Scottish Marine and Freshwater Science Volume 3 Number 10: Scottish Scallop Stocks - Results of 2011 Assessments
This report presents the results of Scottish regional scallop stock assessments carried out by Marine Scotland Science (MSS) based on commercial catch-at-age and survey data up to and including 2010.
7. Tables
Table 2.1.1
Scottish scallop assessment areas.
Name | Statistical Rectangles |
---|---|
Irish Sea | 35-37 E3-E7; 38 E4-E6 |
Clyde | 39-40 E5; 40 E4 (eastern half) |
West of Kintyre | 39-40 E2-E3; 39 E4; 40 E4 (western half); 41 E4 |
North West | 41-46 E1-E3; 42-46 E4 |
Orkney | 47 E4; 46-47 E5-E6; 47 E7 |
Shetland | 48-51 E7-E9 |
North East | 44 E5-E8; 45 E6-E9; 46 E7-E9; 47 E8-E9 |
East Coast | 39-43 E8-F0; 40-41 E6; 40-43 E7; 44 E9-F0 |
Table 3.1.1
Scottish ( UK vessels into Scotland) dredge landings (tonnes) 1982‑2010.
West of Kintyre | North East | North West | Clyde | Irish Sea | Orkney | East Coast | Shetland | Total | |
---|---|---|---|---|---|---|---|---|---|
1982 | 1510 | 672 | 3173 | 102 | 340 | 42 | 5 | 422 | 6267 |
1983 | 1234 | 645 | 2035 | 68 | 266 | 29 | 0 | 357 | 4634 |
1984 | 1677 | 403 | 2220 | 132 | 594 | 22 | 0 | 402 | 5450 |
1985 | 913 | 388 | 1524 | 180 | 538 | 4 | 0 | 212 | 3759 |
1986 | 688 | 559 | 1437 | 76 | 270 | 109 | 0 | 362 | 3500 |
1987 | 883 | 679 | 1670 | 92 | 415 | 120 | 1 | 311 | 4171 |
1988 | 469 | 671 | 1608 | 79 | 594 | 35 | 0 | 359 | 3815 |
1989 | 577 | 894 | 1581 | 31 | 450 | 293 | 1 | 537 | 4364 |
1990 | 620 | 952 | 1357 | 18 | 451 | 176 | 2 | 447 | 4023 |
1991 | 617 | 385 | 1104 | 48 | 374 | 124 | 540 | 405 | 3598 |
1992 | 781 | 1733 | 1070 | 23 | 234 | 26 | 321 | 534 | 4722 |
1993 | 1014 | 1571 | 976 | 75 | 314 | 0 | 626 | 530 | 5105 |
1994 | 1073 | 2322 | 1845 | 182 | 242 | 110 | 1813 | 603 | 8191 |
1995 | 890 | 3150 | 1366 | 139 | 410 | 214 | 1902 | 743 | 8814 |
1996 | 1154 | 3490 | 2037 | 110 | 605 | 214 | 679 | 674 | 8964 |
1997 | 1360 | 2943 | 2300 | 231 | 397 | 146 | 715 | 932 | 9024 |
1998 | 1528 | 1739 | 2698 | 243 | 682 | 163 | 1006 | 920 | 8979 |
1999 | 1188 | 1682 | 1087 | 201 | 1039 | 291 | 1819 | 748 | 8055 |
2000 | 1630 | 1512 | 3337 | 352 | 458 | 99 | 726 | 338 | 8451 |
2001 | 1069 | 1736 | 4132 | 304 | 732 | 442 | 299 | 492 | 9205 |
2002 | 1308 | 738 | 4261 | 473 | 637 | 268 | 416 | 558 | 8659 |
2003 | 1410 | 1814 | 3441 | 508 | 634 | 175 | 818 | 757 | 9556 |
2004 | 1026 | 1958 | 3163 | 541 | 751 | 148 | 2439 | 894 | 10921 |
2005 | 1021 | 2025 | 2517 | 415 | 839 | 220 | 1571 | 720 | 9328 |
2006 | 785 | 1795 | 1135 | 387 | 733 | 117 | 1769 | 772 | 7494 |
2007 | 974 | 1333 | 1300 | 300 | 831 | 104 | 2593 | 858 | 8293 |
2008 | 1383 | 1385 | 2201 | 439 | 894 | 184 | 1843 | 880 | 9209 |
2009 | 1092 | 2155 | 1318 | 451 | 1450 | 192 | 1528 | 915 | 9100 |
2010 | 1305 | 1267 | 1134 | 528 | 1461 | 176 | 1757 | 1071 | 8698 |
Table 3.1.2
Diver caught landings (tonnes) in Scotland, 1982-2010.
West of Kintyre | North East | North West | Clyde | Irish Sea | Orkney | East Coast | Shetland | Total | |
---|---|---|---|---|---|---|---|---|---|
1982 | 83 | 12 | 163 | 5 | 0 | 7 | 0 | 1 | 270 |
1983 | 106 | 4 | 303 | 3 | 0 | 38 | 0 | 0 | 453 |
1984 | 59 | 0 | 388 | 11 | 0 | 98 | 0 | 0 | 557 |
1985 | 63 | 0 | 310 | 0 | 0 | 71 | 0 | 0 | 444 |
1986 | 94 | 17 | 299 | 0 | 0 | 35 | 0 | 6 | 451 |
1987 | 105 | 1 | 426 | 0 | 0 | 46 | 0 | 0 | 579 |
1988 | 88 | 5 | 244 | 0 | 0 | 49 | 0 | 1 | 388 |
1989 | 59 | 1 | 170 | 1 | 0 | 74 | 0 | 0 | 304 |
1990 | 41 | 3 | 83 | 0 | 0 | 57 | 0 | 0 | 184 |
1991 | 47 | 0 | 175 | 0 | 0 | 70 | 0 | 21 | 312 |
1992 | 47 | 0 | 199 | 0 | 0 | 87 | 0 | 1 | 334 |
1993 | 48 | 0 | 171 | 0 | 0 | 36 | 0 | 47 | 302 |
1994 | 120 | 0 | 157 | 1 | 0 | 92 | 0 | 27 | 397 |
1995 | 38 | 2 | 453 | 0 | 0 | 222 | 0 | 22 | 737 |
1996 | 109 | 3 | 287 | 0 | 0 | 150 | 0 | 0 | 550 |
1997 | 128 | 1 | 481 | 0 | 0 | 139 | 1 | 0 | 750 |
1998 | 135 | 0 | 394 | 0 | 0 | 176 | 0 | 6 | 711 |
1999 | 62 | 0 | 150 | 0 | 0 | 162 | 0 | 7 | 381 |
2000 | 18 | 4 | 142 | 0 | 0 | 162 | 0 | 0 | 325 |
2001 | 113 | 9 | 244 | 15 | 0 | 126 | 0 | 0 | 507 |
2002 | 50 | 3 | 272 | 37 | 0 | 117 | 0 | 14 | 492 |
2003 | 59 | 0 | 296 | 18 | 0 | 113 | 0 | 4 | 490 |
2004 | 43 | 0 | 118 | 27 | 0 | 87 | 0 | 0 | 274 |
2005 | 43 | 3 | 134 | 42 | 0 | 172 | 0 | 0 | 393 |
2006 | 52 | 6 | 196 | 11 | 0 | 100 | 0 | 0 | 365 |
2007 | 48 | 0 | 230 | 4 | 0 | 80 | 0 | 0 | 363 |
2008 | 56 | 1 | 162 | 37 | 0 | 89 | 0 | 0 | 346 |
2009 | 60 | 3 | 205 | 24 | 0 | 101 | 0 | 0 | 392 |
2010 | 73 | 1 | 228 | 6 | 0 | 125 | 0 | 0 | 433 |
Table 3.1.3
Landings (tonnes) into the UK (excluding Scotland), Ireland and the Isle of Man. No UK (non Scotland) data available prior to 2000 for East Coast, North East and West of Kintyre assessment areas. Shaded cells filled in on basis of average proportions (2000-2010) of UK total for use in stock assessments. '+' denotes landings of < 0.5 tonnes.
England, Wales & N. Ireland | Ireland | Isle of Man | ||||
---|---|---|---|---|---|---|
East Coast | Irish Sea | North East | West of Kintyre | West of Kintyre | Irish Sea | |
1982 | + | 581 | + | 126 | 1402 | |
1983 | + | 523 | + | 106 | 1368 | |
1984 | + | 457 | + | 137 | 1977 | |
1985 | + | 328 | + | 2162 | ||
1986 | 575 | + | 62 | 1508 | ||
1987 | + | 485 | + | 78 | 1833 | |
1988 | 609 | + | 44 | 1230 | ||
1989 | + | 846 | 1 | 50 | 1047 | |
1990 | + | 447 | 1 | 52 | 916 | |
1991 | 14 | 403 | + | 52 | 898 | |
1992 | 9 | 373 | 1 | 65 | 633 | |
1993 | 16 | 373 | 1 | 84 | 645 | |
1994 | 47 | 560 | 2 | 95 | 931 | |
1995 | 49 | 403 | 2 | 73 | 931 | |
1996 | 17 | 656 | 2 | 100 | 1064 | |
1997 | 18 | 975 | 2 | 118 | 932 | |
1998 | 26 | 1418 | 1 | 131 | 705 | |
1999 | 47 | 1496 | 1 | 99 | 794 | |
2000 | 18 | 1078 | 73 | 965 | ||
2001 | 14 | 1373 | 58 | 1116 | ||
2002 | 62 | 1070 | 6 | 95 | 1093 | |
2003 | 12 | 1029 | + | 54 | 1105 | |
2004 | 874 | + | 98 | 1106 | ||
2005 | 6 | 1026 | 101 | 1016 | ||
2006 | 24 | 754 | 67 | 1522 | ||
2007 | 27 | 1319 | 85 | 1201 | ||
2008 | 20 | 1559 | 84 | 1453 | ||
2009 | 9 | 2134 | 226 | + | 1434 | |
2010 | 10 | 1892 | 95 | + | 1641 |
Table 3.1.4
Total landings (tonnes) from Scottish assessment areas 1982-2010, as used in the assessments (includes landings into UK, Ireland and the Isle of Man). Note that estimated Irish Sea landings prior to 2000 may include a small amount of landings from elsewhere in ICES Sub-area VIIa ( i.e. from outside the Irish Sea assessment area).
West of Kintyre | North East | North West | Clyde | Irish Sea | Orkney | East Coast | Shetland | Total | |
---|---|---|---|---|---|---|---|---|---|
1982 | 1718 | 685 | 3336 | 107 | 2323 | 49 | 5 | 423 | 8647 |
1983 | 1446 | 650 | 2338 | 71 | 2157 | 67 | 0 | 357 | 7085 |
1984 | 1873 | 403 | 2608 | 143 | 3030 | 121 | 0 | 402 | 8580 |
1985 | 1053 | 388 | 1834 | 180 | 3031 | 76 | 2 | 212 | 6776 |
1986 | 844 | 577 | 1735 | 78 | 2354 | 143 | 0 | 368 | 6099 |
1987 | 1066 | 681 | 2096 | 92 | 2734 | 169 | 1 | 311 | 7150 |
1988 | 601 | 677 | 1852 | 79 | 2433 | 84 | 0 | 360 | 6087 |
1989 | 686 | 895 | 1752 | 32 | 2343 | 367 | 2 | 537 | 6614 |
1990 | 714 | 956 | 1447 | 18 | 1814 | 237 | 4 | 449 | 5639 |
1991 | 716 | 385 | 1288 | 48 | 1675 | 194 | 560 | 426 | 5292 |
1992 | 893 | 1734 | 1270 | 23 | 1240 | 113 | 340 | 535 | 6148 |
1993 | 1146 | 1572 | 1148 | 77 | 1332 | 36 | 643 | 577 | 6530 |
1994 | 1292 | 2327 | 2010 | 184 | 1733 | 202 | 1865 | 634 | 10247 |
1995 | 1002 | 3155 | 1820 | 139 | 1744 | 436 | 1953 | 765 | 11015 |
1996 | 1364 | 3500 | 2324 | 111 | 2325 | 365 | 697 | 675 | 11360 |
1997 | 1605 | 2949 | 2781 | 231 | 2304 | 285 | 738 | 932 | 11825 |
1998 | 1795 | 1740 | 3096 | 243 | 2805 | 340 | 1032 | 926 | 11977 |
1999 | 1349 | 1683 | 1255 | 201 | 3330 | 455 | 1865 | 755 | 10894 |
2000 | 1721 | 1516 | 3481 | 352 | 2501 | 260 | 744 | 338 | 10913 |
2001 | 1250 | 1800 | 4376 | 319 | 3221 | 572 | 312 | 496 | 12345 |
2002 | 1453 | 748 | 4533 | 510 | 2800 | 385 | 478 | 572 | 11480 |
2003 | 1552 | 1814 | 3758 | 528 | 2768 | 291 | 830 | 764 | 12305 |
2004 | 1174 | 1965 | 3297 | 574 | 2731 | 243 | 2445 | 895 | 13324 |
2005 | 1166 | 2028 | 2656 | 456 | 2881 | 393 | 1580 | 720 | 11881 |
2006 | 908 | 1829 | 1356 | 400 | 3010 | 226 | 1806 | 776 | 10310 |
2007 | 1108 | 1338 | 1532 | 305 | 3351 | 203 | 2745 | 861 | 11444 |
2008 | 1541 | 1395 | 2407 | 481 | 3911 | 285 | 1936 | 880 | 12836 |
2009 | 1386 | 2159 | 1548 | 484 | 5058 | 298 | 1642 | 915 | 13489 |
2010 | 1478 | 1274 | 1365 | 534 | 5030 | 314 | 1791 | 1072 | 12858 |
Table 3.2.1
West of Kintyre: Quarterly dredge landings ( UK vessels into Scotland) and sampling levels, 1982-2010.
Landings (tonnes) | Numbers Aged and Measured/Boats Sampled | ||||||||
---|---|---|---|---|---|---|---|---|---|
Qtr1 | Qtr2 | Qtr3 | Qtr4 | Total | Qtr1 | Qtr2 | Qtr3 | Qtr4 | |
1982 | 583 | 368 | 301 | 258 | 1510 | 4239/19 | 1421/7 | 0 | 1764/4 |
1983 | 353 | 447 | 198 | 237 | 1235 | 178/1 | 356/2 | 557/2 | 3794/22 |
1984 | 405 | 552 | 365 | 355 | 1677 | 864/5 | 642/4 | 576/3 | 308/19 |
1985 | 296 | 300 | 147 | 170 | 913 | 2925/17 | 1300/7 | 3565/19 | 1655/9 |
1986 | 187 | 229 | 133 | 138 | 687 | 4888/29 | 1803/10 | 1545/8 | 1930/8 |
1987 | 304 | 225 | 209 | 144 | 882 | 2391/10 | 1494/8 | 1466/7 | 1244/6 |
1988 | 159 | 134 | 61 | 116 | 469 | 1899/9 | 1818/9 | 265/1 | 1624/7 |
1989 | 135 | 126 | 153 | 165 | 578 | 471/2 | 914/4 | 2268/7 | 2555/8 |
1990 | 161 | 60 | 169 | 230 | 620 | 1063/4 | 2360/9 | 3532/15 | 6091/24 |
1991 | 204 | 152 | 138 | 123 | 617 | 5038/23 | 7950/32 | 6408/23 | 5991/24 |
1992 | 151 | 216 | 187 | 225 | 780 | 2841/14 | 2487/12 | 6016/23 | 6229/18 |
1993 | 166 | 269 | 221 | 357 | 1013 | 3173/12 | 4580/16 | 3581/13 | 5827/23 |
1994 | 290 | 322 | 173 | 288 | 1073 | 6834/29 | 1212/9 | 5669/21 | 4753/20 |
1995 | 153 | 192 | 215 | 330 | 890 | 5843/22 | 2164/8 | 1500/6 | 1966/7 |
1996 | 283 | 329 | 280 | 262 | 1154 | 4612/18 | 2309/9 | 2306/9 | 2752/11 |
1997 | 379 | 218 | 257 | 506 | 1360 | 3142/12 | 765/4 | 2498/9 | 1288/5 |
1998 | 459 | 308 | 279 | 482 | 1528 | 2469/10 | 2311/9 | 1538/7 | 3584/16 |
1999 | 314 | 335 | 374 | 165 | 1188 | 1385/5 | 1727/8 | 1440/6 | 1475/7 |
2000 | 174 | 489 | 442 | 525 | 1630 | 1280/6 | 3176/15 | 1251/6 | 3340/15 |
2001 | 367 | 331 | 192 | 180 | 1070 | 3239/15 | 2145/10 | 1680/9 | 1234/6 |
2002 | 315 | 261 | 314 | 417 | 1307 | 2453/12 | 1026/5 | 930/5 | 1654/8 |
2003 | 331 | 335 | 397 | 347 | 1410 | 1605/8 | 1553/8 | 2543/14 | 2724/15 |
2004 | 313 | 216 | 205 | 292 | 1026 | 1608/7 | 173/1 | 703/4 | 1434/9 |
2005 | 258 | 277 | 174 | 312 | 1021 | 2508/16 | 1607/8 | 1537/7 | 486/3 |
2006 | 257 | 167 | 140 | 220 | 784 | 527/3 | 379/2 | 467/3 | 0 |
2007 | 270 | 243 | 192 | 270 | 975 | 918/6 | 1242/6 | 1538/7 | 694/4 |
2008 | 278 | 581 | 214 | 310 | 1383 | 1557/8 | 634/4 | 1888/9 | 538/3 |
2009 | 337 | 287 | 196 | 270 | 1090 | 1207/6 | 1833/9 | 1695/7 | 1214/5 |
2010 | 341 | 276 | 284 | 404 | 1305 | 145/1 | 663/3 | 792/4 | 524/2 |
Table 3.2.2
West of Kintyre: Total catch-at-age numbers (in thousands).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1982 | 570 | 1184 | 1050 | 746 | 878 | 1011 | 928 | 869 | 1914 |
1983 | 34 | 905 | 1287 | 1026 | 815 | 1030 | 1104 | 909 | 1339 |
1984 | 155 | 877 | 1274 | 1537 | 1307 | 1298 | 1072 | 580 | 1521 |
1985 | 184 | 465 | 641 | 652 | 580 | 600 | 614 | 517 | 1227 |
1986 | 74 | 381 | 527 | 567 | 584 | 434 | 409 | 429 | 1099 |
1987 | 217 | 982 | 893 | 877 | 781 | 488 | 377 | 299 | 958 |
1988 | 29 | 378 | 416 | 430 | 309 | 336 | 324 | 293 | 769 |
1989 | 1146 | 787 | 595 | 578 | 378 | 132 | 209 | 138 | 371 |
1990 | 194 | 1350 | 618 | 548 | 409 | 328 | 285 | 120 | 299 |
1991 | 115 | 614 | 1021 | 406 | 350 | 319 | 267 | 163 | 562 |
1992 | 28 | 483 | 1429 | 1142 | 515 | 307 | 302 | 240 | 695 |
1993 | 115 | 1408 | 1947 | 1217 | 775 | 373 | 255 | 180 | 407 |
1994 | 10 | 363 | 1508 | 1768 | 1111 | 609 | 361 | 172 | 1023 |
1995 | 17 | 823 | 1439 | 1298 | 785 | 449 | 185 | 82 | 407 |
1996 | 6 | 1287 | 2288 | 1564 | 1098 | 628 | 356 | 187 | 456 |
1997 | 24 | 1678 | 2531 | 1485 | 1298 | 838 | 433 | 303 | 451 |
1998 | 7 | 560 | 2260 | 2043 | 1806 | 1440 | 793 | 340 | 625 |
1999 | 16 | 932 | 2036 | 1712 | 868 | 660 | 498 | 250 | 578 |
2000 | 0 | 837 | 1946 | 1905 | 1433 | 1215 | 803 | 518 | 738 |
2001 | 0 | 35 | 1125 | 1636 | 1060 | 767 | 614 | 485 | 845 |
2002 | 1 | 168 | 1147 | 2251 | 1529 | 1045 | 718 | 527 | 550 |
2003 | 4 | 735 | 2951 | 1489 | 1317 | 781 | 613 | 407 | 609 |
2004 | 28 | 640 | 1375 | 2074 | 797 | 672 | 404 | 159 | 457 |
2005 | 5 | 686 | 1564 | 1471 | 1076 | 586 | 365 | 164 | 327 |
2006 | 0 | 28 | 1745 | 1395 | 859 | 518 | 319 | 174 | 92 |
2007 | 1 | 337 | 1287 | 1293 | 987 | 919 | 580 | 236 | 227 |
2008 | 11 | 466 | 1219 | 1965 | 1955 | 1208 | 721 | 369 | 200 |
2009 | 0 | 672 | 1819 | 1488 | 1723 | 1126 | 640 | 293 | 512 |
2010 | 0 | 1181 | 2297 | 2139 | 1325 | 718 | 469 | 216 | 491 |
Table 3.2.3
West of Kintyre: Mean weights-at-age (muscle) (kg) in total catch (also used for stock weights).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1982 | 0.014 | 0.017 | 0.019 | 0.020 | 0.024 | 0.025 | 0.028 | 0.029 | 0.033 |
1983 | 0.011 | 0.014 | 0.017 | 0.018 | 0.019 | 0.020 | 0.022 | 0.025 | 0.029 |
1984 | 0.011 | 0.015 | 0.019 | 0.022 | 0.024 | 0.025 | 0.026 | 0.028 | 0.031 |
1985 | 0.013 | 0.016 | 0.019 | 0.022 | 0.023 | 0.024 | 0.025 | 0.026 | 0.028 |
1986 | 0.012 | 0.014 | 0.017 | 0.020 | 0.023 | 0.024 | 0.024 | 0.025 | 0.028 |
1987 | 0.012 | 0.015 | 0.018 | 0.021 | 0.023 | 0.025 | 0.026 | 0.027 | 0.029 |
1988 | 0.012 | 0.015 | 0.016 | 0.020 | 0.021 | 0.023 | 0.025 | 0.026 | 0.028 |
1989 | 0.014 | 0.016 | 0.018 | 0.020 | 0.022 | 0.025 | 0.025 | 0.026 | 0.029 |
1990 | 0.012 | 0.016 | 0.019 | 0.022 | 0.024 | 0.025 | 0.026 | 0.028 | 0.032 |
1991 | 0.013 | 0.016 | 0.020 | 0.022 | 0.024 | 0.025 | 0.027 | 0.028 | 0.031 |
1992 | 0.014 | 0.015 | 0.016 | 0.020 | 0.023 | 0.025 | 0.026 | 0.027 | 0.030 |
1993 | 0.013 | 0.015 | 0.018 | 0.022 | 0.024 | 0.027 | 0.028 | 0.028 | 0.030 |
1994 | 0.015 | 0.016 | 0.017 | 0.019 | 0.022 | 0.026 | 0.028 | 0.029 | 0.033 |
1995 | 0.016 | 0.017 | 0.019 | 0.022 | 0.024 | 0.027 | 0.029 | 0.030 | 0.030 |
1996 | 0.013 | 0.016 | 0.018 | 0.021 | 0.023 | 0.026 | 0.028 | 0.029 | 0.030 |
1997 | 0.014 | 0.016 | 0.019 | 0.022 | 0.024 | 0.026 | 0.027 | 0.029 | 0.027 |
1998 | 0.011 | 0.016 | 0.018 | 0.020 | 0.022 | 0.025 | 0.026 | 0.028 | 0.029 |
1999 | 0.015 | 0.017 | 0.018 | 0.021 | 0.024 | 0.026 | 0.027 | 0.028 | 0.029 |
2000 | 0.014 | 0.016 | 0.019 | 0.020 | 0.023 | 0.024 | 0.026 | 0.028 | 0.031 |
2001 | 0.013 | 0.015 | 0.018 | 0.021 | 0.023 | 0.025 | 0.026 | 0.026 | 0.028 |
2002 | 0.016 | 0.017 | 0.018 | 0.020 | 0.023 | 0.024 | 0.025 | 0.026 | 0.029 |
2003 | 0.015 | 0.016 | 0.017 | 0.019 | 0.023 | 0.025 | 0.027 | 0.028 | 0.031 |
2004 | 0.015 | 0.017 | 0.018 | 0.020 | 0.023 | 0.025 | 0.028 | 0.029 | 0.030 |
2005 | 0.017 | 0.017 | 0.020 | 0.021 | 0.023 | 0.026 | 0.030 | 0.031 | 0.035 |
2006 | 0.016 | 0.014 | 0.017 | 0.019 | 0.024 | 0.027 | 0.030 | 0.034 | 0.034 |
2007 | 0.017 | 0.016 | 0.019 | 0.022 | 0.024 | 0.024 | 0.027 | 0.032 | 0.032 |
2008 | 0.014 | 0.015 | 0.018 | 0.021 | 0.023 | 0.026 | 0.029 | 0.033 | 0.036 |
2009 | 0.015 | 0.016 | 0.017 | 0.018 | 0.020 | 0.023 | 0.025 | 0.026 | 0.030 |
2010 | 0.015 | 0.016 | 0.018 | 0.019 | 0.021 | 0.023 | 0.025 | 0.027 | 0.030 |
Table 3.2.4
Summary of Marine Scotland Science West Coast scallop dredge surveys 1988-2010. Data from greyed out surveys are not used in the assessment.
Vessel | Cruise dates | Dredge type | No. of dredges | Width (m) | No. of hauls | No. of scallops | ||
---|---|---|---|---|---|---|---|---|
From | To | WK | NW | |||||
R.V. Goldseeker (not used in the assessment) |
08-Jun-88 | 12-Aug-88 | A | 2 | 2.25 | 115 | 3543 | |
B | 1 | |||||||
R.V. Goldseeker (not used in the assessment) |
10-Jun-89 | 13-Jul-89 | A | 2 | 2.25 | 94 | 2124 | |
B | 1 | |||||||
R.V. Aora (not used in the assessment) |
14-Jun-90 | 30-Jun-90 | A | 3 | 4.5 | 85 | 4951 | |
B | 3 | |||||||
R.V. Aora (not used in the assessment) |
15-Jun-92 | 03-Jul-92 | A | 3 | 4.5 | 103 | 7671 | |
B | 3 | |||||||
R.V. Aora (not used in the assessment) |
21-Jun-93 | 09-Jul-93 | A | 3 | 4.5 | 31 | 78 | 11989 |
B | 3 | |||||||
R.V. Aora | 20-Jun-94 | 08-Jul-94 | A | 3 | 4.5 | 25 | 88 | 12068 |
B | 3 | |||||||
R.V. Aora | 19-Jun-95 | 07-Jul-95 | A | 3 | 4.5 | 25 | 92 | 10807 |
B | 3 | |||||||
R.V. Aora | 17-Jun-96 | 05-Jul-96 | A | 3 | 4.5 | 26 | 85 | 10124 |
B | 3 | |||||||
R.V. Aora | 16-Jun-97 | 04-Jul-97 | A | 3 | 4.5 | 24 | 79 | 9813 |
B | 3 | |||||||
R.V. Aora | 15-Jun-98 | 03-Jul-98 | A | 3 | 4.5 | 24 | 88 | 11561 |
B | 3 | |||||||
R.V. Aora | 14-Jun-99 | 30-Jun-99 | A | 3 | 4.5 | 26 | 90 | 10373 |
B | 3 | |||||||
R.V. Aora | 12-Jun-00 | 30-Jun-00 | A | 3 | 4.5 | 28 | 84 | 12073 |
B | 3 | |||||||
R.V. Aora | 09-Jul-01 | 27-Jul-01 | A | 3 | 4.5 | 26 | 96 | 11180 |
B | 3 | |||||||
F.V. Golden Promise (not used in the assessment) |
20-May-02 | 30-May-02 | A | 10 | 15 | 15 | 61 | 11124 |
A | 10 | |||||||
R.V. Aora | 10-Jun-02 | 26-Jun-02 | A | 3 | 4.5 | 26 | 83 | 11259 |
B | 3 | |||||||
R.V. Aora II | 04-Aug-03 | 22-Aug-03 | A | 6 | 9 | 24 | 78 | 21134 |
B | 6 | |||||||
R.V. Aora II | 09-Aug-04 | 27-Aug-04 | A | 6 | 9 | 24 | 76 | 18963 |
B | 6 | |||||||
R.V. Aora II | 08-Aug-05 | 27-Aug-05 | A | 6 | 9 | 23 | 74 | 17912 |
B | 6 | |||||||
R.V. Aora II | 07-Aug-06 | 26-Aug-06 | A | 6 | 9 | 23 | 82 | 22190 |
B | 6 | |||||||
R.V. Aora II | 21-May-07 | 07-Jun-07 | A | 6 | 9 | 22 | 75 | 13404 |
B | 6 | |||||||
R.V. Alba na Mara | 24-Apr-08 | 15-May-08 | A | 6 | 9 | 22 | 70 | 12608 |
B | 6 | |||||||
R.V. Alba na Mara | 19-Apr-09 | 08-May-09 | A | 6 | 9 | 22 | 69 | 13817 |
B | 6 | |||||||
R.V. Alba na Mara | 02-Apr-10 | 20-Apr-10 | A | 6 | 9 | 21 | 68 | 12293 |
B | 6 |
Dredge Type A: Standard commercial dredge. 2.5' wide. 9 tooth bar. Large belly rings.
Dredge Type B: Laboratory sampling dredge. 2.5' wide. 11 tooth bar. Small belly rings.
Table 3.2.5
West of Kintyre: Available research-vessel survey data (numbers hour -1metre -1 by age class and year).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1993 | 0.82 | 10.65 | 10.01 | 5.95 | 4.41 | 1.85 | 1.24 | 1.12 | 3.48 |
1994 | 0.13 | 4.30 | 13.52 | 9.84 | 4.73 | 3.70 | 1.23 | 0.78 | 2.21 |
1995 | 0.40 | 10.12 | 11.62 | 8.88 | 4.34 | 2.14 | 1.19 | 0.54 | 1.70 |
1996 | 0.12 | 4.14 | 9.11 | 7.15 | 5.49 | 2.79 | 1.37 | 0.96 | 2.11 |
1997 | 0.24 | 5.69 | 12.58 | 9.59 | 5.81 | 3.71 | 1.78 | 0.92 | 1.70 |
1998 | 0.21 | 7.88 | 11.71 | 9.98 | 5.95 | 4.37 | 2.14 | 1.20 | 1.65 |
1999 | 0.05 | 4.59 | 6.80 | 7.14 | 5.37 | 4.27 | 3.26 | 1.82 | 1.96 |
2000 | 0.05 | 6.63 | 13.23 | 8.58 | 5.82 | 4.16 | 2.83 | 1.49 | 1.45 |
2001 | 0.80 | 2.19 | 10.23 | 8.28 | 4.24 | 2.65 | 2.02 | 1.22 | 1.88 |
2002 | 0.02 | 9.91 | 5.13 | 10.23 | 7.60 | 3.45 | 2.42 | 1.23 | 4.31 |
2003 | 0.42 | 5.61 | 13.01 | 4.90 | 6.12 | 3.06 | 1.93 | 1.61 | 2.25 |
2004 | 1.18 | 5.28 | 6.35 | 9.71 | 3.56 | 3.84 | 2.12 | 1.62 | 2.44 |
2005 | 0.15 | 9.75 | 10.00 | 6.77 | 6.17 | 3.34 | 2.27 | 1.48 | 2.13 |
2006 | 0.04 | 4.39 | 9.80 | 12.55 | 8.68 | 4.90 | 3.83 | 2.38 | 2.35 |
2007 | 0.02 | 2.19 | 8.02 | 8.45 | 7.75 | 4.99 | 3.47 | 2.72 | 3.72 |
2008 | 0.07 | 2.12 | 5.67 | 7.07 | 5.69 | 3.92 | 2.02 | 1.45 | 2.06 |
2009 | 0.07 | 4.61 | 14.12 | 8.99 | 5.01 | 3.31 | 2.33 | 0.74 | 4.63 |
2010 | 0.03 | 10.35 | 15.16 | 8.80 | 3.98 | 2.32 | 1.05 | 0.26 | 4.29 |
Table 3.2.6
West of Kintyre: Final TSA run parameter estimates.
Parameter | Notation | Description | 2011 |
---|---|---|---|
Initial fishing mortality | F(3, 1982) | Fishing mortality at age a in year y | 0.12 |
F(4, 1982) | 0.16 | ||
F(6, 1982) | 0.16 | ||
Survey selectivities | Ф(3) | Survey selectivity at age a | 0.06 |
Ф(4) | 0.13 | ||
Ф(5) | 0.15 | ||
Ф(6) | 0.15 | ||
Ф(7) | 0.16 | ||
Ф(8) | 0.17 | ||
Ф(9) | 0.17 | ||
Fishing mortality standard deviations | σ F | Transitory changes in overall F | 0.00 |
σ U | Persistent changes in selection (age effect in F) | 0.16 | |
σ V | Transitory changes in the year effect in F | 0.03 | |
σ Y | Persistent changes in the year effect in F | 0.20 | |
Survey catchability standard deviations | σ Ω | Transitory changes in survey catchability | 0.00 |
σ β | Persistent changes in survey catchability | 0.13 | |
Measurement coefficients of variation | cv landings | Coefficient of variation of landings-at-age data | 0.27 |
cv survey | Coefficient of variation of survey data | 0.31 | |
Recruitment | η² | Mean | 10.19 |
cv rec | Coefficient of variation of recruitment curve | 0.22 |
Table 3.2.7
West of Kintyre: Estimated population abundance by age and year (in thousands) from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1982 | 11935 | 9121 | 8052 | 7492 | 5850 | 5246 | 4325 | 7462 |
1983 | 9526 | 9301 | 6926 | 6067 | 5300 | 4059 | 3635 | 7996 |
1984 | 8232 | 7346 | 6888 | 5045 | 4119 | 3582 | 2721 | 7773 |
1985 | 7597 | 6237 | 5252 | 4732 | 3144 | 2554 | 2223 | 6517 |
1986 | 7782 | 5914 | 4645 | 3780 | 3176 | 2110 | 1715 | 5867 |
1987 | 7620 | 6109 | 4458 | 3383 | 2599 | 2184 | 1452 | 5209 |
1988 | 5557 | 5729 | 4478 | 3133 | 2295 | 1766 | 1484 | 4523 |
1989 | 6274 | 4239 | 4264 | 3271 | 2230 | 1632 | 1256 | 4270 |
1990 | 9999 | 4734 | 3113 | 3087 | 2438 | 1664 | 1212 | 4104 |
1991 | 10909 | 7619 | 3421 | 2181 | 2265 | 1802 | 1228 | 3929 |
1992 | 11865 | 8611 | 5526 | 2414 | 1557 | 1636 | 1313 | 3755 |
1993 | 14157 | 9413 | 5999 | 3683 | 1643 | 1052 | 1120 | 3498 |
1994 | 13338 | 11223 | 6494 | 3993 | 2507 | 1117 | 715 | 3171 |
1995 | 14453 | 10597 | 7866 | 4193 | 2476 | 1546 | 689 | 2408 |
1996 | 14631 | 11654 | 7762 | 5494 | 2855 | 1686 | 1053 | 2106 |
1997 | 14025 | 11537 | 8277 | 5315 | 3634 | 1891 | 1115 | 2088 |
1998 | 12396 | 11029 | 8006 | 5602 | 3372 | 2332 | 1211 | 2034 |
1999 | 12498 | 9798 | 7577 | 5217 | 3355 | 1991 | 1374 | 1887 |
2000 | 12215 | 10047 | 6930 | 5055 | 3449 | 2220 | 1319 | 2158 |
2001 | 9099 | 9796 | 6968 | 4320 | 2806 | 1919 | 1234 | 1930 |
2002 | 12611 | 7437 | 7082 | 4552 | 2555 | 1654 | 1137 | 1880 |
2003 | 10729 | 10332 | 5230 | 4460 | 2503 | 1394 | 901 | 1644 |
2004 | 10644 | 8646 | 6756 | 3117 | 2317 | 1306 | 727 | 1329 |
2005 | 11272 | 8638 | 5907 | 4250 | 1863 | 1385 | 781 | 1230 |
2006 | 9344 | 9222 | 6008 | 3797 | 2629 | 1151 | 859 | 1248 |
2007 | 7946 | 7726 | 6605 | 4020 | 2499 | 1720 | 752 | 1365 |
2008 | 9687 | 6525 | 5454 | 4244 | 2326 | 1428 | 975 | 1188 |
2009 | 10029 | 7841 | 4413 | 3105 | 1985 | 1053 | 641 | 960 |
2010 | 12485 | 7983 | 5060 | 2370 | 1237 | 765 | 395 | 603 |
Table 3.2.8
West of Kintyre: Standard errors of estimates of population abundance by age and year (in thousands) from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1982 | 1140 | 873 | 755 | 797 | 878 | 972 | 1034 | 1886 |
1983 | 991 | 909 | 680 | 588 | 599 | 668 | 737 | 1571 |
1984 | 935 | 787 | 707 | 529 | 423 | 434 | 485 | 1284 |
1985 | 884 | 737 | 602 | 532 | 342 | 281 | 284 | 944 |
1986 | 897 | 717 | 581 | 467 | 382 | 257 | 212 | 809 |
1987 | 904 | 737 | 576 | 459 | 348 | 293 | 201 | 732 |
1988 | 651 | 730 | 576 | 438 | 334 | 258 | 220 | 653 |
1989 | 629 | 531 | 588 | 456 | 337 | 262 | 205 | 637 |
1990 | 836 | 512 | 426 | 466 | 360 | 268 | 211 | 616 |
1991 | 802 | 659 | 405 | 331 | 365 | 286 | 214 | 590 |
1992 | 839 | 644 | 524 | 320 | 259 | 288 | 228 | 557 |
1993 | 955 | 680 | 485 | 393 | 240 | 197 | 222 | 510 |
1994 | 814 | 771 | 470 | 337 | 282 | 175 | 145 | 434 |
1995 | 980 | 655 | 563 | 324 | 219 | 185 | 116 | 319 |
1996 | 972 | 812 | 495 | 396 | 220 | 152 | 128 | 248 |
1997 | 968 | 774 | 575 | 333 | 258 | 147 | 102 | 205 |
1998 | 891 | 750 | 533 | 392 | 202 | 159 | 92 | 164 |
1999 | 922 | 702 | 521 | 363 | 202 | 115 | 89 | 127 |
2000 | 885 | 734 | 486 | 355 | 231 | 143 | 85 | 147 |
2001 | 676 | 702 | 512 | 315 | 180 | 126 | 83 | 131 |
2002 | 968 | 551 | 526 | 357 | 175 | 110 | 80 | 135 |
2003 | 863 | 808 | 407 | 360 | 196 | 105 | 70 | 131 |
2004 | 862 | 710 | 547 | 232 | 189 | 115 | 65 | 123 |
2005 | 982 | 711 | 497 | 364 | 152 | 134 | 85 | 135 |
2006 | 882 | 815 | 510 | 331 | 247 | 108 | 97 | 154 |
2007 | 959 | 740 | 634 | 392 | 257 | 198 | 88 | 194 |
2008 | 1236 | 802 | 564 | 487 | 289 | 198 | 153 | 207 |
2009 | 1486 | 1029 | 615 | 428 | 336 | 207 | 142 | 242 |
2010 | 1764 | 1241 | 842 | 477 | 294 | 232 | 141 | 242 |
Table 3.2.9
West of Kintyre: Estimates of fishing mortality by age and year from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1982 | 0.100 | 0.124 | 0.126 | 0.208 | 0.208 | 0.208 | 0.208 | 0.208 |
1983 | 0.110 | 0.151 | 0.167 | 0.244 | 0.244 | 0.244 | 0.244 | 0.244 |
1984 | 0.126 | 0.185 | 0.226 | 0.324 | 0.324 | 0.324 | 0.324 | 0.324 |
1985 | 0.099 | 0.144 | 0.178 | 0.248 | 0.248 | 0.248 | 0.248 | 0.248 |
1986 | 0.092 | 0.130 | 0.164 | 0.222 | 0.222 | 0.222 | 0.222 | 0.222 |
1987 | 0.125 | 0.157 | 0.199 | 0.236 | 0.236 | 0.236 | 0.236 | 0.236 |
1988 | 0.107 | 0.133 | 0.160 | 0.184 | 0.184 | 0.184 | 0.184 | 0.184 |
1989 | 0.113 | 0.138 | 0.159 | 0.140 | 0.140 | 0.140 | 0.140 | 0.140 |
1990 | 0.121 | 0.156 | 0.178 | 0.146 | 0.146 | 0.146 | 0.146 | 0.146 |
1991 | 0.085 | 0.165 | 0.175 | 0.156 | 0.156 | 0.156 | 0.156 | 0.156 |
1992 | 0.080 | 0.211 | 0.235 | 0.201 | 0.201 | 0.201 | 0.201 | 0.201 |
1993 | 0.085 | 0.218 | 0.259 | 0.225 | 0.225 | 0.225 | 0.225 | 0.225 |
1994 | 0.075 | 0.206 | 0.288 | 0.326 | 0.326 | 0.326 | 0.326 | 0.326 |
1995 | 0.065 | 0.154 | 0.210 | 0.234 | 0.234 | 0.234 | 0.234 | 0.234 |
1996 | 0.084 | 0.189 | 0.208 | 0.258 | 0.258 | 0.258 | 0.258 | 0.258 |
1997 | 0.090 | 0.207 | 0.228 | 0.277 | 0.277 | 0.277 | 0.277 | 0.277 |
1998 | 0.082 | 0.220 | 0.271 | 0.343 | 0.343 | 0.343 | 0.343 | 0.343 |
1999 | 0.066 | 0.186 | 0.244 | 0.253 | 0.253 | 0.253 | 0.253 | 0.253 |
2000 | 0.069 | 0.211 | 0.308 | 0.409 | 0.409 | 0.409 | 0.409 | 0.409 |
2001 | 0.050 | 0.170 | 0.272 | 0.359 | 0.359 | 0.359 | 0.359 | 0.359 |
2002 | 0.049 | 0.201 | 0.312 | 0.449 | 0.449 | 0.449 | 0.449 | 0.449 |
2003 | 0.066 | 0.275 | 0.343 | 0.498 | 0.498 | 0.498 | 0.498 | 0.498 |
2004 | 0.059 | 0.228 | 0.315 | 0.364 | 0.364 | 0.364 | 0.364 | 0.364 |
2005 | 0.053 | 0.211 | 0.284 | 0.329 | 0.329 | 0.329 | 0.329 | 0.329 |
2006 | 0.040 | 0.184 | 0.251 | 0.274 | 0.274 | 0.274 | 0.274 | 0.274 |
2007 | 0.047 | 0.195 | 0.294 | 0.395 | 0.395 | 0.395 | 0.395 | 0.395 |
2008 | 0.062 | 0.241 | 0.413 | 0.592 | 0.592 | 0.592 | 0.592 | 0.592 |
2009 | 0.079 | 0.287 | 0.465 | 0.747 | 0.747 | 0.747 | 0.747 | 0.747 |
2010 | 0.106 | 0.352 | 0.561 | 0.887 | 0.887 | 0.887 | 0.887 | 0.887 |
Table 3.2.10
West of Kintyre: Standard errors of estimates of log fishing mortality by age and year from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1982 | 0.181 | 0.183 | 0.189 | 0.112 | 0.112 | 0.112 | 0.112 | 0.112 |
1983 | 0.174 | 0.175 | 0.177 | 0.111 | 0.111 | 0.111 | 0.111 | 0.111 |
1984 | 0.172 | 0.171 | 0.171 | 0.111 | 0.111 | 0.111 | 0.111 | 0.111 |
1985 | 0.173 | 0.174 | 0.175 | 0.128 | 0.128 | 0.128 | 0.128 | 0.128 |
1986 | 0.172 | 0.174 | 0.175 | 0.124 | 0.124 | 0.124 | 0.124 | 0.124 |
1987 | 0.169 | 0.171 | 0.171 | 0.120 | 0.120 | 0.120 | 0.120 | 0.120 |
1988 | 0.170 | 0.171 | 0.173 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 |
1989 | 0.167 | 0.169 | 0.170 | 0.121 | 0.121 | 0.121 | 0.121 | 0.121 |
1990 | 0.166 | 0.167 | 0.168 | 0.115 | 0.115 | 0.115 | 0.115 | 0.115 |
1991 | 0.170 | 0.166 | 0.167 | 0.110 | 0.110 | 0.110 | 0.110 | 0.110 |
1992 | 0.171 | 0.161 | 0.163 | 0.104 | 0.104 | 0.104 | 0.104 | 0.104 |
1993 | 0.169 | 0.159 | 0.161 | 0.104 | 0.104 | 0.104 | 0.104 | 0.104 |
1994 | 0.172 | 0.164 | 0.156 | 0.099 | 0.099 | 0.099 | 0.099 | 0.099 |
1995 | 0.173 | 0.166 | 0.163 | 0.107 | 0.107 | 0.107 | 0.107 | 0.107 |
1996 | 0.170 | 0.162 | 0.161 | 0.104 | 0.104 | 0.104 | 0.104 | 0.104 |
1997 | 0.169 | 0.161 | 0.163 | 0.101 | 0.101 | 0.101 | 0.101 | 0.101 |
1998 | 0.171 | 0.161 | 0.158 | 0.094 | 0.094 | 0.094 | 0.094 | 0.094 |
1999 | 0.173 | 0.165 | 0.162 | 0.112 | 0.112 | 0.112 | 0.112 | 0.112 |
2000 | 0.171 | 0.164 | 0.156 | 0.092 | 0.092 | 0.092 | 0.092 | 0.092 |
2001 | 0.173 | 0.170 | 0.162 | 0.102 | 0.102 | 0.102 | 0.102 | 0.102 |
2002 | 0.174 | 0.166 | 0.157 | 0.097 | 0.097 | 0.097 | 0.097 | 0.097 |
2003 | 0.172 | 0.158 | 0.154 | 0.100 | 0.100 | 0.100 | 0.100 | 0.100 |
2004 | 0.174 | 0.168 | 0.162 | 0.117 | 0.117 | 0.117 | 0.117 | 0.117 |
2005 | 0.176 | 0.170 | 0.167 | 0.119 | 0.119 | 0.119 | 0.119 | 0.119 |
2006 | 0.179 | 0.176 | 0.175 | 0.129 | 0.129 | 0.129 | 0.129 | 0.129 |
2007 | 0.180 | 0.179 | 0.175 | 0.117 | 0.117 | 0.117 | 0.117 | 0.117 |
2008 | 0.187 | 0.188 | 0.178 | 0.117 | 0.117 | 0.117 | 0.117 | 0.117 |
2009 | 0.204 | 0.210 | 0.205 | 0.144 | 0.144 | 0.144 | 0.144 | 0.144 |
2010 | 0.243 | 0.253 | 0.254 | 0.211 | 0.211 | 0.211 | 0.211 | 0.211 |
Table 3.2.11
West of Kintyre: Stock summary from the final TSA run.
Catch (t) | Catch estimate (t) | SSB (t) | Recruitment (1000s) | Mean F(4-6) | |
---|---|---|---|---|---|
1982 | 216 | 202 | 1382 | 11935 | 0.153 |
1983 | 175 | 179 | 1049 | 9526 | 0.187 |
1984 | 226 | 228 | 1049 | 8232 | 0.245 |
1985 | 125 | 143 | 844 | 7597 | 0.190 |
1986 | 101 | 111 | 723 | 7782 | 0.172 |
1987 | 125 | 119 | 708 | 7620 | 0.197 |
1988 | 72 | 82 | 593 | 5557 | 0.159 |
1989 | 66 | 70 | 587 | 6274 | 0.145 |
1990 | 84 | 83 | 662 | 9999 | 0.160 |
1991 | 85 | 88 | 716 | 10909 | 0.165 |
1992 | 108 | 107 | 711 | 11865 | 0.215 |
1993 | 136 | 131 | 812 | 14157 | 0.234 |
1994 | 154 | 157 | 837 | 13338 | 0.273 |
1995 | 121 | 131 | 925 | 14453 | 0.199 |
1996 | 165 | 152 | 948 | 14631 | 0.218 |
1997 | 193 | 172 | 987 | 14025 | 0.238 |
1998 | 214 | 184 | 918 | 12396 | 0.278 |
1999 | 164 | 147 | 907 | 12498 | 0.228 |
2000 | 209 | 193 | 886 | 12215 | 0.309 |
2001 | 151 | 150 | 765 | 9099 | 0.267 |
2002 | 176 | 166 | 781 | 12611 | 0.321 |
2003 | 187 | 179 | 726 | 10729 | 0.372 |
2004 | 142 | 138 | 699 | 10644 | 0.302 |
2005 | 141 | 135 | 743 | 11272 | 0.275 |
2006 | 110 | 113 | 670 | 9344 | 0.236 |
2007 | 135 | 147 | 690 | 7946 | 0.295 |
2008 | 187 | 182 | 652 | 9687 | 0.415 |
2009 | 168 | 159 | 553 | 10029 | 0.500 |
2010 | 178 | 167 | 566 | 12485 | 0.600 |
Table 3.3.1
North West: Quarterly dredge landings ( UK vessels into Scotland) and sampling levels, 1982-2010.
Landings (tonnes) | Numbers Aged and Measured/Boats Sampled | ||||||||
---|---|---|---|---|---|---|---|---|---|
Qtr1 | Qtr2 | Qtr3 | Qtr4 | Total | Qtr1 | Qtr2 | Qtr3 | Qtr4 | |
1982 | 834 | 1280 | 599 | 460 | 3173 | 3078/11 | 1407/6 | 175/1 | 172/1 |
1983 | 334 | 797 | 519 | 385 | 2035 | 1899/11 | 473/3 | 1490/8 | 851/6 |
1984 | 447 | 872 | 519 | 381 | 2219 | 1503/9 | 605/3 | 3433/19 | 1166/5 |
1985 | 359 | 580 | 339 | 246 | 1524 | 1239/7 | 844/4 | 974/5 | 2240/13 |
1986 | 465 | 326 | 355 | 291 | 1437 | 569/3 | 3624/16 | 1640/9 | 1251/6 |
1987 | 365 | 547 | 365 | 393 | 1670 | 2145/11 | 3774/19 | 2117/11 | 285/2 |
1988 | 374 | 493 | 324 | 417 | 1608 | 179/1 | 1341/7 | 244/2 | 267/2 |
1989 | 201 | 593 | 396 | 391 | 1581 | 448/2 | 1089/7 | 1610/11 | 593/3 |
1990 | 177 | 467 | 356 | 357 | 1357 | 0 | 3081/18 | 702/3 | 3727/14 |
1991 | 361 | 195 | 244 | 304 | 1104 | 3115/11 | 2631/12 | 10104/15 | 4617/16 |
1992 | 238 | 238 | 262 | 332 | 1070 | 9098/26 | 7461/13 | 4637/13 | 3958/15 |
1993 | 158 | 265 | 292 | 261 | 976 | 7826/22 | 3659/14 | 4911/17 | 2671/12 |
1994 | 428 | 361 | 430 | 626 | 1845 | 1855/9 | 3335/16 | 3166/13 | 3386/14 |
1995 | 308 | 154 | 371 | 533 | 1366 | 3273/14 | 2133/8 | 1431/7 | 6054/28 |
1996 | 473 | 335 | 694 | 535 | 2037 | 3449/16 | 2942/12 | 4790/23 | 6873/30 |
1997 | 311 | 262 | 435 | 1292 | 2300 | 2382/10 | 266/2 | 1384/7 | 9011/41 |
1998 | 562 | 605 | 804 | 727 | 2698 | 1646/11 | 1367/8 | 4097/20 | 4895/27 |
1999 | 550 | 483 | 50 | 4 | 1087 | 1347/8 | 360/2 | 0 | 0 |
2000 | 869 | 1148 | 521 | 799 | 3337 | 5022/22 | 3010/15 | 2399/11 | 1100/5 |
2001 | 1253 | 1017 | 933 | 929 | 4132 | 5378/26 | 4060/19 | 2707/13 | 4730/25 |
2002 | 626 | 1228 | 1269 | 1139 | 4262 | 3203/15 | 4536/24 | 1397/7 | 2101/12 |
2003 | 980 | 1031 | 607 | 822 | 3440 | 2589/12 | 2161/12 | 1785/7 | 3410/16 |
2004 | 859 | 802 | 735 | 767 | 3163 | 762/3 | 1138/6 | 1471/6 | 615/4 |
2005 | 729 | 947 | 402 | 439 | 2517 | 0 | 195/9 | 0 | 977/6 |
2006 | 250 | 368 | 256 | 261 | 1135 | 494/3 | 1428/7 | 204/1 | 295/2 |
2007 | 454 | 218 | 205 | 422 | 1299 | 654/2 | 278/2 | 0 | 1157/5 |
2008 | 1078 | 419 | 358 | 347 | 2202 | 250/1 | 851/4 | 252/1 | 1566/7 |
2009 | 252 | 437 | 332 | 297 | 1318 | 0 | 2125/9 | 759/3 | 715/3 |
2010 | 252 | 303 | 246 | 334 | 1135 | 263/1 | 2161/15 | 485/3 | 2233/12 |
Table 3.3.2
North West: Total catch-at-age numbers (in thousands).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1982 | 432 | 1561 | 2029 | 2707 | 2746 | 2554 | 2215 | 1154 | 2641 |
1983 | 34 | 334 | 514 | 1000 | 2024 | 2247 | 2395 | 1659 | 2870 |
1984 | 399 | 1392 | 1760 | 1640 | 1903 | 1760 | 1721 | 955 | 2514 |
1985 | 192 | 724 | 1302 | 1113 | 1124 | 1261 | 1142 | 897 | 2139 |
1986 | 116 | 567 | 984 | 991 | 1290 | 1142 | 1333 | 1111 | 2299 |
1987 | 51 | 725 | 1107 | 1206 | 1518 | 1087 | 1571 | 1265 | 4038 |
1988 | 22 | 415 | 988 | 1230 | 1128 | 980 | 1318 | 1061 | 3317 |
1989 | 15 | 243 | 891 | 1401 | 1418 | 1451 | 1173 | 950 | 2444 |
1990 | 203 | 1143 | 791 | 669 | 859 | 945 | 833 | 650 | 2126 |
1991 | 129 | 822 | 1597 | 1013 | 1042 | 883 | 628 | 360 | 1061 |
1992 | 94 | 879 | 1258 | 1505 | 932 | 535 | 584 | 424 | 1221 |
1993 | 198 | 803 | 1726 | 1284 | 1054 | 486 | 363 | 257 | 537 |
1994 | 8 | 667 | 2371 | 3332 | 1709 | 892 | 565 | 257 | 1273 |
1995 | 28 | 528 | 1430 | 2234 | 2319 | 1174 | 786 | 328 | 1218 |
1996 | 4 | 538 | 1976 | 2705 | 2675 | 1656 | 1167 | 553 | 1714 |
1997 | 73 | 1242 | 2408 | 2771 | 2676 | 2453 | 1665 | 1010 | 1173 |
1998 | 185 | 1178 | 2822 | 2852 | 2738 | 1981 | 2173 | 1249 | 2008 |
1999 | 16 | 589 | 1523 | 1288 | 1020 | 889 | 663 | 299 | 464 |
2000 | 25 | 1557 | 3511 | 3456 | 2980 | 2562 | 2038 | 1279 | 1475 |
2001 | 6 | 1089 | 5099 | 4696 | 3884 | 2800 | 2505 | 1613 | 2924 |
2002 | 6 | 1353 | 6210 | 6936 | 3689 | 2672 | 1786 | 909 | 1855 |
2003 | 15 | 754 | 3259 | 5299 | 4301 | 2949 | 1809 | 1163 | 1651 |
2004 | 9 | 696 | 3092 | 4555 | 4073 | 2312 | 1399 | 871 | 1500 |
2005 | 8 | 662 | 2417 | 3168 | 3373 | 2119 | 963 | 586 | 1240 |
2006 | 0 | 59 | 448 | 1111 | 1881 | 1548 | 1137 | 551 | 719 |
2007 | 0 | 121 | 1446 | 1756 | 1485 | 1823 | 1039 | 712 | 966 |
2008 | 0 | 364 | 1969 | 4261 | 3518 | 1609 | 588 | 205 | 160 |
2009 | 9 | 483 | 925 | 1401 | 1573 | 1570 | 1138 | 696 | 436 |
2010 | 0 | 150 | 1139 | 1444 | 1193 | 1197 | 896 | 488 | 545 |
Table 3.3.3
North West: Mean weights-at-age (muscle) (kg) in total catch (also used for stock weights).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1982 | 0.015 | 0.019 | 0.022 | 0.027 | 0.029 | 0.031 | 0.034 | 0.036 | 0.040 |
1983 | 0.016 | 0.018 | 0.021 | 0.023 | 0.024 | 0.027 | 0.028 | 0.031 | 0.034 |
1984 | 0.019 | 0.021 | 0.024 | 0.026 | 0.028 | 0.030 | 0.030 | 0.032 | 0.039 |
1985 | 0.017 | 0.020 | 0.023 | 0.026 | 0.029 | 0.030 | 0.030 | 0.033 | 0.036 |
1986 | 0.016 | 0.019 | 0.022 | 0.023 | 0.025 | 0.027 | 0.029 | 0.031 | 0.033 |
1987 | 0.016 | 0.018 | 0.021 | 0.023 | 0.024 | 0.026 | 0.026 | 0.027 | 0.030 |
1988 | 0.019 | 0.021 | 0.023 | 0.025 | 0.026 | 0.027 | 0.029 | 0.029 | 0.031 |
1989 | 0.019 | 0.020 | 0.023 | 0.024 | 0.025 | 0.027 | 0.028 | 0.029 | 0.032 |
1990 | 0.017 | 0.021 | 0.024 | 0.027 | 0.025 | 0.027 | 0.027 | 0.029 | 0.033 |
1991 | 0.017 | 0.019 | 0.022 | 0.025 | 0.027 | 0.030 | 0.031 | 0.033 | 0.033 |
1992 | 0.019 | 0.020 | 0.023 | 0.025 | 0.027 | 0.029 | 0.029 | 0.030 | 0.032 |
1993 | 0.020 | 0.021 | 0.024 | 0.026 | 0.028 | 0.030 | 0.032 | 0.033 | 0.035 |
1994 | 0.019 | 0.020 | 0.023 | 0.027 | 0.030 | 0.032 | 0.033 | 0.035 | 0.037 |
1995 | 0.020 | 0.022 | 0.023 | 0.025 | 0.028 | 0.031 | 0.032 | 0.034 | 0.037 |
1996 | 0.017 | 0.020 | 0.023 | 0.026 | 0.028 | 0.030 | 0.031 | 0.031 | 0.032 |
1997 | 0.019 | 0.021 | 0.022 | 0.025 | 0.028 | 0.031 | 0.032 | 0.034 | 0.037 |
1998 | 0.020 | 0.021 | 0.023 | 0.026 | 0.029 | 0.030 | 0.030 | 0.031 | 0.034 |
1999 | 0.017 | 0.020 | 0.024 | 0.028 | 0.031 | 0.033 | 0.034 | 0.035 | 0.039 |
2000 | 0.018 | 0.022 | 0.024 | 0.027 | 0.030 | 0.031 | 0.033 | 0.034 | 0.035 |
2001 | 0.017 | 0.020 | 0.023 | 0.025 | 0.028 | 0.030 | 0.031 | 0.032 | 0.034 |
2002 | 0.016 | 0.020 | 0.023 | 0.026 | 0.029 | 0.032 | 0.034 | 0.035 | 0.037 |
2003 | 0.017 | 0.020 | 0.022 | 0.025 | 0.028 | 0.031 | 0.033 | 0.034 | 0.036 |
2004 | 0.016 | 0.019 | 0.022 | 0.026 | 0.028 | 0.031 | 0.032 | 0.034 | 0.035 |
2005 | 0.016 | 0.020 | 0.023 | 0.027 | 0.029 | 0.031 | 0.034 | 0.036 | 0.035 |
2006 | 0.017 | 0.020 | 0.022 | 0.024 | 0.027 | 0.029 | 0.031 | 0.033 | 0.036 |
2007 | 0.016 | 0.016 | 0.020 | 0.024 | 0.024 | 0.027 | 0.030 | 0.030 | 0.029 |
2008 | 0.016 | 0.021 | 0.024 | 0.028 | 0.031 | 0.034 | 0.038 | 0.042 | 0.041 |
2009 | 0.021 | 0.021 | 0.023 | 0.027 | 0.029 | 0.031 | 0.033 | 0.035 | 0.039 |
2010 | 0.018 | 0.020 | 0.023 | 0.027 | 0.030 | 0.032 | 0.035 | 0.039 | 0.045 |
Table 3.3.4
North West: Available research-vessel survey data by age and year (numbers hour -1metre -1).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1993 | 0.12 | 6.42 | 12.51 | 9.20 | 5.89 | 3.67 | 2.53 | 3.07 | 8.84 |
1994 | 0.05 | 3.69 | 9.16 | 11.07 | 7.55 | 4.36 | 2.77 | 2.17 | 9.94 |
1995 | 0.13 | 5.24 | 7.70 | 10.37 | 8.02 | 4.30 | 2.85 | 2.30 | 5.61 |
1996 | 0.13 | 3.47 | 7.67 | 7.65 | 8.09 | 6.20 | 2.82 | 1.61 | 6.53 |
1997 | 0.07 | 2.84 | 9.43 | 8.75 | 6.46 | 5.74 | 3.60 | 2.13 | 5.09 |
1998 | 0.22 | 7.53 | 8.34 | 8.50 | 5.84 | 4.95 | 4.19 | 3.01 | 5.26 |
1999 | 0.12 | 4.60 | 9.63 | 6.22 | 5.23 | 4.16 | 3.83 | 3.09 | 4.49 |
2000 | 0.08 | 9.72 | 11.32 | 9.14 | 4.65 | 4.72 | 3.47 | 3.20 | 4.51 |
2001 | 0.37 | 6.22 | 14.29 | 8.26 | 5.01 | 2.94 | 2.70 | 1.59 | 2.88 |
2002 | 0.02 | 6.29 | 9.69 | 13.82 | 5.76 | 3.44 | 2.64 | 2.02 | 2.76 |
2003 | 0.90 | 7.89 | 10.48 | 9.35 | 7.93 | 3.76 | 2.26 | 1.87 | 4.22 |
2004 | 0.61 | 4.82 | 7.88 | 8.62 | 7.58 | 5.45 | 2.85 | 2.13 | 4.14 |
2005 | 0.02 | 2.27 | 5.05 | 6.38 | 7.24 | 6.02 | 4.80 | 3.68 | 5.77 |
2006 | 0.02 | 2.44 | 6.43 | 6.42 | 6.51 | 5.59 | 4.39 | 3.35 | 4.82 |
2007 | 0.01 | 0.86 | 3.80 | 4.05 | 4.66 | 4.38 | 3.67 | 2.93 | 4.40 |
2008 | 0.02 | 0.29 | 1.33 | 3.69 | 4.37 | 4.38 | 3.45 | 2.68 | 7.96 |
2009 | 0.03 | 0.78 | 2.73 | 3.89 | 4.43 | 3.58 | 3.12 | 1.57 | 7.94 |
2010 | 0.01 | 1.36 | 3.59 | 3.44 | 3.28 | 2.86 | 2.04 | 0.84 | 7.55 |
Table 3.3.5
North West: Final TSA run parameter estimates.
Parameter | Notation | Description | 2011 |
---|---|---|---|
Initial fishing mortality | F(3, 1982) | Fishing mortality at age a in year y | 0.06 |
F(4, 1982) | 0.12 | ||
F(6, 1982) | 0.41 | ||
Survey selectivities | Ф(3) | Survey selectivity at age a | 0.22 |
Ф(4) | 0.43 | ||
Ф(5) | 0.57 | ||
Ф(6) | 0.65 | ||
Ф(7) | 0.71 | ||
Ф(8) | 0.79 | ||
Ф(9) | 0.97 | ||
Fishing mortality standard deviations | σ F | Transitory changes in overall F | 0.00 |
σ U | Persistent changes in selection (age effect in F) | 0.07 | |
σ V | Transitory changes in the year effect in F | 0.25 | |
σ Y | Persistent changes in the year effect in F | 0.08 | |
Survey catchability standard deviations | σ Ω | Transitory changes in survey catchability | 0.04 |
σ β | Persistent changes in survey catchability | 0.09 | |
Measurement coefficients of variation | cv landings | Coefficient of variation of landings-at-age data | 0.27 |
cv survey | Coefficient of variation of survey data | 0.22 | |
Recruitment | η² | Mean | 2.75 |
cv rec | Coefficient of variation of recruitment curve | 0.32 |
Table 3.3.6
North West: Estimated population abundance by age and year (in thousands) from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1982 | 25773 | 24132 | 21787 | 16933 | 14438 | 12324 | 7194 | 15533 |
1983 | 22764 | 21149 | 19063 | 16619 | 11629 | 10070 | 8620 | 15687 |
1984 | 20825 | 18814 | 16986 | 15012 | 12542 | 8772 | 7602 | 18348 |
1985 | 17599 | 16987 | 14704 | 12950 | 10805 | 9028 | 6315 | 18681 |
1986 | 16670 | 14541 | 13530 | 11488 | 9660 | 8059 | 6730 | 18629 |
1987 | 16231 | 13776 | 11548 | 10483 | 8439 | 7109 | 5922 | 18620 |
1988 | 12176 | 13298 | 10723 | 8664 | 7243 | 5862 | 4917 | 16936 |
1989 | 13955 | 10014 | 10417 | 8069 | 6045 | 5030 | 4066 | 15079 |
1990 | 19259 | 11475 | 7702 | 7669 | 5460 | 4062 | 3373 | 12838 |
1991 | 23120 | 15873 | 9046 | 5792 | 5411 | 3814 | 2809 | 11182 |
1992 | 32073 | 19192 | 12342 | 6837 | 4129 | 3863 | 2704 | 9838 |
1993 | 32862 | 26784 | 15253 | 9233 | 5016 | 3002 | 2806 | 9013 |
1994 | 28782 | 27609 | 21558 | 11849 | 6939 | 3800 | 2267 | 8893 |
1995 | 29783 | 24007 | 21729 | 16104 | 8577 | 4993 | 2749 | 8028 |
1996 | 30171 | 25001 | 19123 | 16559 | 11805 | 6288 | 3648 | 7876 |
1997 | 29861 | 25197 | 19567 | 14183 | 11651 | 8288 | 4415 | 8071 |
1998 | 34775 | 24794 | 19219 | 14010 | 9458 | 7756 | 5512 | 8302 |
1999 | 37694 | 28869 | 18674 | 13536 | 9074 | 6125 | 5019 | 8939 |
2000 | 49776 | 31884 | 23326 | 14588 | 10180 | 6824 | 4607 | 10499 |
2001 | 41878 | 41483 | 23925 | 16299 | 9223 | 6453 | 4327 | 9578 |
2002 | 37230 | 34510 | 29957 | 15580 | 9248 | 5181 | 3655 | 7852 |
2003 | 32572 | 30870 | 25075 | 19717 | 9138 | 5424 | 3031 | 6737 |
2004 | 27286 | 27140 | 22965 | 16901 | 12113 | 5566 | 3307 | 5951 |
2005 | 26563 | 22828 | 20628 | 15966 | 10970 | 7863 | 3603 | 5997 |
2006 | 25644 | 22299 | 17673 | 14783 | 10906 | 7493 | 5371 | 6558 |
2007 | 19127 | 21701 | 17885 | 13447 | 10914 | 8054 | 5533 | 8809 |
2008 | 17487 | 16162 | 17255 | 13405 | 9867 | 8022 | 5920 | 10542 |
2009 | 20874 | 14695 | 12532 | 12320 | 9569 | 7045 | 5728 | 11755 |
2010 | 18031 | 17619 | 11664 | 9311 | 9143 | 7101 | 5228 | 12975 |
Table 3.3.7
North West: Standard errors of estimates of population abundance by age and year (in thousands) from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1982 | 282 | 239 | 217 | 150 | 121 | 110 | 84 | 144 |
1983 | 261 | 233 | 190 | 161 | 99 | 86 | 77 | 136 |
1984 | 278 | 217 | 192 | 155 | 132 | 86 | 76 | 177 |
1985 | 248 | 230 | 175 | 151 | 120 | 104 | 70 | 200 |
1986 | 235 | 206 | 187 | 141 | 119 | 96 | 85 | 214 |
1987 | 203 | 195 | 168 | 152 | 112 | 95 | 78 | 231 |
1988 | 139 | 167 | 158 | 135 | 116 | 87 | 75 | 233 |
1989 | 130 | 116 | 137 | 127 | 104 | 91 | 69 | 231 |
1990 | 191 | 109 | 95 | 110 | 98 | 81 | 71 | 220 |
1991 | 182 | 160 | 89 | 77 | 86 | 77 | 65 | 209 |
1992 | 224 | 153 | 132 | 72 | 60 | 67 | 61 | 194 |
1993 | 208 | 189 | 126 | 106 | 57 | 47 | 53 | 177 |
1994 | 173 | 175 | 156 | 102 | 83 | 45 | 37 | 156 |
1995 | 187 | 145 | 141 | 121 | 78 | 64 | 35 | 129 |
1996 | 182 | 157 | 118 | 112 | 93 | 60 | 49 | 110 |
1997 | 183 | 152 | 126 | 91 | 83 | 70 | 45 | 98 |
1998 | 230 | 153 | 121 | 94 | 64 | 60 | 51 | 88 |
1999 | 226 | 193 | 119 | 89 | 64 | 45 | 43 | 86 |
2000 | 297 | 192 | 159 | 95 | 69 | 50 | 36 | 91 |
2001 | 257 | 249 | 148 | 116 | 61 | 45 | 33 | 78 |
2002 | 260 | 213 | 190 | 104 | 64 | 35 | 27 | 61 |
2003 | 260 | 217 | 160 | 135 | 60 | 39 | 22 | 52 |
2004 | 235 | 220 | 171 | 120 | 90 | 42 | 27 | 50 |
2005 | 235 | 200 | 178 | 132 | 89 | 68 | 32 | 56 |
2006 | 244 | 200 | 164 | 143 | 106 | 73 | 56 | 70 |
2007 | 217 | 208 | 167 | 135 | 117 | 88 | 61 | 102 |
2008 | 244 | 184 | 173 | 137 | 111 | 97 | 73 | 133 |
2009 | 350 | 207 | 152 | 144 | 115 | 93 | 81 | 169 |
2010 | 517 | 297 | 173 | 127 | 122 | 98 | 79 | 206 |
Table 3.3.8
North West: Estimates of fishing mortality by age and year from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1982 | 0.050 | 0.084 | 0.109 | 0.156 | 0.156 | 0.156 | 0.156 | 0.156 |
1983 | 0.040 | 0.069 | 0.089 | 0.131 | 0.131 | 0.131 | 0.131 | 0.131 |
1984 | 0.054 | 0.096 | 0.121 | 0.179 | 0.179 | 0.179 | 0.179 | 0.179 |
1985 | 0.041 | 0.076 | 0.097 | 0.144 | 0.144 | 0.144 | 0.144 | 0.144 |
1986 | 0.041 | 0.078 | 0.102 | 0.157 | 0.157 | 0.157 | 0.157 | 0.157 |
1987 | 0.049 | 0.098 | 0.132 | 0.210 | 0.210 | 0.210 | 0.210 | 0.210 |
1988 | 0.044 | 0.091 | 0.127 | 0.198 | 0.198 | 0.198 | 0.198 | 0.198 |
1989 | 0.045 | 0.099 | 0.140 | 0.214 | 0.214 | 0.214 | 0.214 | 0.214 |
1990 | 0.039 | 0.087 | 0.124 | 0.179 | 0.179 | 0.179 | 0.179 | 0.179 |
1991 | 0.035 | 0.085 | 0.124 | 0.165 | 0.165 | 0.165 | 0.165 | 0.165 |
1992 | 0.030 | 0.078 | 0.117 | 0.149 | 0.149 | 0.149 | 0.149 | 0.149 |
1993 | 0.024 | 0.067 | 0.102 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 |
1994 | 0.030 | 0.090 | 0.141 | 0.172 | 0.172 | 0.172 | 0.172 | 0.172 |
1995 | 0.025 | 0.077 | 0.122 | 0.160 | 0.160 | 0.160 | 0.160 | 0.160 |
1996 | 0.029 | 0.095 | 0.148 | 0.202 | 0.202 | 0.202 | 0.202 | 0.202 |
1997 | 0.036 | 0.121 | 0.184 | 0.257 | 0.257 | 0.257 | 0.257 | 0.257 |
1998 | 0.037 | 0.134 | 0.201 | 0.285 | 0.285 | 0.285 | 0.285 | 0.285 |
1999 | 0.017 | 0.064 | 0.096 | 0.135 | 0.135 | 0.135 | 0.135 | 0.135 |
2000 | 0.033 | 0.134 | 0.208 | 0.302 | 0.302 | 0.302 | 0.302 | 0.302 |
2001 | 0.041 | 0.175 | 0.276 | 0.412 | 0.412 | 0.412 | 0.412 | 0.412 |
2002 | 0.037 | 0.166 | 0.267 | 0.368 | 0.368 | 0.368 | 0.368 | 0.368 |
2003 | 0.033 | 0.145 | 0.242 | 0.337 | 0.337 | 0.337 | 0.337 | 0.337 |
2004 | 0.028 | 0.125 | 0.213 | 0.280 | 0.280 | 0.280 | 0.280 | 0.280 |
2005 | 0.024 | 0.105 | 0.183 | 0.231 | 0.231 | 0.231 | 0.231 | 0.231 |
2006 | 0.016 | 0.069 | 0.123 | 0.153 | 0.153 | 0.153 | 0.153 | 0.153 |
2007 | 0.018 | 0.076 | 0.137 | 0.158 | 0.158 | 0.158 | 0.158 | 0.158 |
2008 | 0.024 | 0.101 | 0.185 | 0.187 | 0.187 | 0.187 | 0.187 | 0.187 |
2009 | 0.019 | 0.080 | 0.146 | 0.148 | 0.148 | 0.148 | 0.148 | 0.148 |
2010 | 0.017 | 0.072 | 0.131 | 0.131 | 0.131 | 0.131 | 0.131 | 0.131 |
Table 3.3.9
North West: Standard errors of estimates of log fishing mortality by age and year from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1982 | 0.155 | 0.159 | 0.162 | 0.152 | 0.152 | 0.152 | 0.152 | 0.152 |
1983 | 0.155 | 0.161 | 0.166 | 0.169 | 0.169 | 0.169 | 0.169 | 0.169 |
1984 | 0.143 | 0.145 | 0.147 | 0.128 | 0.128 | 0.128 | 0.128 | 0.128 |
1985 | 0.142 | 0.144 | 0.146 | 0.128 | 0.128 | 0.128 | 0.128 | 0.128 |
1986 | 0.140 | 0.142 | 0.144 | 0.123 | 0.123 | 0.123 | 0.123 | 0.123 |
1987 | 0.138 | 0.139 | 0.140 | 0.115 | 0.115 | 0.115 | 0.115 | 0.115 |
1988 | 0.137 | 0.138 | 0.139 | 0.112 | 0.112 | 0.112 | 0.112 | 0.112 |
1989 | 0.136 | 0.136 | 0.136 | 0.108 | 0.108 | 0.108 | 0.108 | 0.108 |
1990 | 0.136 | 0.136 | 0.136 | 0.107 | 0.107 | 0.107 | 0.107 | 0.107 |
1991 | 0.136 | 0.135 | 0.135 | 0.105 | 0.105 | 0.105 | 0.105 | 0.105 |
1992 | 0.137 | 0.135 | 0.135 | 0.104 | 0.104 | 0.104 | 0.104 | 0.104 |
1993 | 0.137 | 0.136 | 0.135 | 0.104 | 0.104 | 0.104 | 0.104 | 0.104 |
1994 | 0.137 | 0.135 | 0.134 | 0.103 | 0.103 | 0.103 | 0.103 | 0.103 |
1995 | 0.138 | 0.136 | 0.134 | 0.104 | 0.104 | 0.104 | 0.104 | 0.104 |
1996 | 0.137 | 0.135 | 0.132 | 0.101 | 0.101 | 0.101 | 0.101 | 0.101 |
1997 | 0.136 | 0.133 | 0.130 | 0.098 | 0.098 | 0.098 | 0.098 | 0.098 |
1998 | 0.136 | 0.132 | 0.130 | 0.097 | 0.097 | 0.097 | 0.097 | 0.097 |
1999 | 0.141 | 0.139 | 0.137 | 0.106 | 0.106 | 0.106 | 0.106 | 0.106 |
2000 | 0.138 | 0.133 | 0.130 | 0.095 | 0.095 | 0.095 | 0.095 | 0.095 |
2001 | 0.135 | 0.130 | 0.126 | 0.088 | 0.088 | 0.088 | 0.088 | 0.088 |
2002 | 0.137 | 0.133 | 0.129 | 0.095 | 0.095 | 0.095 | 0.095 | 0.095 |
2003 | 0.141 | 0.140 | 0.136 | 0.106 | 0.106 | 0.106 | 0.106 | 0.106 |
2004 | 0.145 | 0.147 | 0.144 | 0.119 | 0.119 | 0.119 | 0.119 | 0.119 |
2005 | 0.150 | 0.157 | 0.154 | 0.132 | 0.132 | 0.132 | 0.132 | 0.132 |
2006 | 0.154 | 0.165 | 0.163 | 0.139 | 0.139 | 0.139 | 0.139 | 0.139 |
2007 | 0.158 | 0.173 | 0.171 | 0.146 | 0.146 | 0.146 | 0.146 | 0.146 |
2008 | 0.166 | 0.183 | 0.181 | 0.155 | 0.155 | 0.155 | 0.155 | 0.155 |
2009 | 0.180 | 0.201 | 0.199 | 0.167 | 0.167 | 0.167 | 0.167 | 0.167 |
2010 | 0.201 | 0.219 | 0.217 | 0.176 | 0.176 | 0.176 | 0.176 | 0.176 |
Table 3.3.10
North West: Stock summary from the final TSA run.
Catch (t) | Catch estimate (t) | SSB (t) | Recruitment (1000s) | Mean F(4-6) | |
---|---|---|---|---|---|
1982 | 529 | 419 | 3847 | 25773 | 0.116 |
1983 | 365 | 283 | 3088 | 22764 | 0.096 |
1984 | 400 | 414 | 3349 | 20825 | 0.132 |
1985 | 285 | 304 | 2976 | 17599 | 0.106 |
1986 | 267 | 279 | 2553 | 16670 | 0.112 |
1987 | 325 | 311 | 2221 | 16231 | 0.147 |
1988 | 290 | 275 | 2088 | 12176 | 0.139 |
1989 | 272 | 260 | 1866 | 13955 | 0.151 |
1990 | 220 | 207 | 1858 | 19259 | 0.130 |
1991 | 197 | 193 | 1913 | 23120 | 0.125 |
1992 | 194 | 185 | 2204 | 32073 | 0.115 |
1993 | 175 | 190 | 2643 | 32862 | 0.098 |
1994 | 312 | 301 | 2904 | 28782 | 0.134 |
1995 | 283 | 285 | 3018 | 29783 | 0.120 |
1996 | 359 | 363 | 3054 | 30171 | 0.148 |
1997 | 430 | 466 | 3143 | 29861 | 0.187 |
1998 | 475 | 493 | 3176 | 34775 | 0.206 |
1999 | 196 | 266 | 3421 | 37694 | 0.098 |
2000 | 543 | 598 | 3993 | 49776 | 0.215 |
2001 | 678 | 749 | 3787 | 41878 | 0.288 |
2002 | 704 | 694 | 3660 | 37230 | 0.267 |
2003 | 590 | 593 | 3317 | 32572 | 0.241 |
2004 | 512 | 492 | 3060 | 27286 | 0.206 |
2005 | 415 | 418 | 3023 | 26563 | 0.173 |
2006 | 213 | 264 | 2789 | 25644 | 0.115 |
2007 | 238 | 260 | 2450 | 19127 | 0.124 |
2008 | 375 | 394 | 2975 | 17487 | 0.158 |
2009 | 242 | 273 | 2660 | 20874 | 0.125 |
2010 | 217 | 251 | 2689 | 18031 | 0.111 |
Table 3.4.1
Clyde: Quarterly dredge landings ( UK vessels into Scotland) and market sample details 1985-2010.
Landings (tonnes) | Numbers Aged and Measured/Boats Sampled | ||||||||
---|---|---|---|---|---|---|---|---|---|
Qtr1 | Qtr2 | Qtr3 | Qtr4 | Total | Qtr1 | Qtr2 | Qtr3 | Qtr4 | |
1985 | 80 | 24 | 27 | 48 | 180 | 0 | 0 | 0 | 154/1 |
1986 | 24 | 28 | 11 | 12 | 76 | 0 | 0 | 0 | 0 |
1987 | 25 | 22 | 5 | 40 | 92 | 0 | 0 | 0 | 0 |
1988 | 57 | 8 | 5 | 9 | 79 | 0 | 0 | 0 | 0 |
1989 | 21 | 4 | 0 | 6 | 31 | 0 | 0 | 0 | 221/1 |
1990 | 6 | 12 | 0 | 0 | 18 | 0 | 0 | 0 | 0 |
1991 | 6 | 11 | 11 | 20 | 49 | 0 | 0 | 0 | 396/2 |
1992 | 8 | 5 | 4 | 7 | 23 | 0 | 0 | 0 | 245/1 |
1993 | 21 | 2 | 0 | 51 | 75 | 231/1 | 406/2 | 0 | 394/2 |
1994 | 86 | 9 | 38 | 49 | 182 | 0 | 0 | 279/2 | 324/1 |
1995 | 51 | 56 | 8 | 23 | 139 | 189/1 | 330/2 | 0 | 0 |
1996 | 25 | 16 | 27 | 43 | 110 | 220/1 | 0 | 234/1 | 525/2 |
1997 | 56 | 41 | 18 | 116 | 231 | 0 | 594/3 | 0 | 2024/9 |
1998 | 52 | 48 | 56 | 87 | 243 | 390/2 | 147/1 | 0 | 244/1 |
1999 | 67 | 36 | 33 | 66 | 201 | 280/1 | 0 | 0 | 377/2 |
2000 | 19 | 43 | 103 | 187 | 352 | 257/1 | 364/2 | 0 | 0 |
2001 | 78 | 75 | 25 | 126 | 304 | 0 | 0 | 230/1 | 913/5 |
2002 | 115 | 83 | 97 | 178 | 473 | 128/1 | 303/2 | 125/1 | 327/2 |
2003 | 99 | 69 | 148 | 192 | 508 | 0 | 296/2 | 645/4 | 200/1 |
2004 | 140 | 87 | 109 | 205 | 541 | 509/2 | 136/1 | 0 | 1721/9 |
2005 | 120 | 63 | 50 | 181 | 414 | 151/1 | 221/1 | 0 | 815/5 |
2006 | 164 | 48 | 60 | 115 | 387 | 261/2 | 0 | 0 | 0 |
2007 | 79 | 56 | 36 | 128 | 299 | 238/2 | 0 | 0 | 112/1 |
2008 | 107 | 120 | 119 | 93 | 439 | 295/2 | 0 | 0 | 948/5 |
2009 | 103 | 112 | 112 | 124 | 451 | 170/1 | 0 | 0 | 301/2 |
2010 | 101 | 95 | 165 | 167 | 528 | 800/3 | 930/4 | 852/4 | 0 |
Table 3.5.1
Irish Sea: Quarterly dredge landings ( UK vessels into Scotland) and market sample details 1985-2010.
Landings (tonnes) | Numbers Aged and Measured/Boats Sampled | ||||||||
---|---|---|---|---|---|---|---|---|---|
Qtr1 | Qtr2 | Qtr3 | Qtr4 | Total | Qtr1 | Qtr2 | Qtr3 | Qtr4 | |
1985 | 251 | 196 | 19 | 72 | 538 | 0 | 0 | 0 | 0 |
1986 | 135 | 82 | 1 | 52 | 270 | 0 | 120/1 | 0 | 431/3 |
1987 | 160 | 192 | 0 | 63 | 415 | 0 | 232/2 | 238/1 | 315/2 |
1988 | 194 | 254 | 0 | 146 | 594 | 0 | 1348/6 | 0 | 0 |
1989 | 97 | 155 | 0 | 198 | 450 | 0 | 0 | 0 | 0 |
1990 | 86 | 312 | 1 | 52 | 451 | 0 | 620/3 | 0 | 0 |
1991 | 171 | 78 | 0 | 126 | 374 | 0 | 0 | 628/3 | 277/1 |
1992 | 152 | 6 | 0 | 76 | 234 | 650/2 | 0 | 286/1 | 325/1 |
1993 | 134 | 118 | 0 | 62 | 314 | 1988/7 | 817/3 | 1613/7 | 260/1 |
1994 | 81 | 16 | 0 | 146 | 242 | 817/3 | 551/2 | 326/1 | |
1995 | 136 | 107 | 0 | 167 | 410 | 1206/5 | 1140/4 | 1190/5 | |
1996 | 251 | 94 | 0 | 260 | 605 | 231/1 | 452/2 | 676/3 | 525/2 |
1997 | 219 | 62 | 0 | 115 | 397 | 1110/5 | 919/4 | 0 | 0 |
1998 | 215 | 67 | 8 | 392 | 682 | 941/4 | 270/1 | 0 | 1652/8 |
1999 | 518 | 145 | 10 | 366 | 1039 | 1045/5 | 432/2 | 206/2 | 0 |
2000 | 191 | 70 | 0 | 197 | 458 | 1257/7 | 0 | 390/2 | 339/2 |
2001 | 202 | 149 | 1 | 381 | 732 | 0 | 122/1 | 0 | 1180/5 |
2002 | 221 | 158 | 2 | 256 | 637 | 0 | 0 | 330/2 | 0 |
2003 | 236 | 122 | 0 | 276 | 634 | 0 | 441/2 | 702/3 | 211/1 |
2004 | 190 | 11 | 0 | 549 | 751 | 0 | 0 | 0 | 1273/7 |
2005 | 309 | 159 | 0 | 371 | 839 | 142/1 | 0 | 0 | 194/1 |
2006 | 308 | 73 | 0 | 351 | 733 | 0 | 285/2 | 0 | 701/4 |
2007 | 413 | 44 | 0 | 375 | 831 | 0 | 422/2 | 0 | 422/2 |
2008 | 179 | 281 | 1 | 433 | 894 | 227/1 | 0 | 0 | 389/1 |
2009 | 451 | 215 | 0 | 784 | 1450 | 0 | 0 | 0 | 1923/7 |
2010 | 707 | 266 | 0 | 487 | 1461 | 947/5 | 0 | 0 | 0 |
Table 3.6.1
North East: Quarterly dredge landings ( UK vessels into Scotland) and market sample details 1984-2010.
Landings (tonnes) | Numbers Aged and Measured/Boats Sampled | ||||||||
---|---|---|---|---|---|---|---|---|---|
Qtr1 | Qtr2 | Qtr3 | Qtr4 | Total | Qtr1 | Qtr2 | Qtr3 | Qtr4 | |
1984 | 91 | 110 | 131 | 71 | 403 | 0 | 0 | 0 | 144/1 |
1985 | 83 | 79 | 155 | 71 | 388 | 0 | 158/1 | 0 | 0 |
1986 | 55 | 198 | 138 | 168 | 559 | 623/4 | 906/6 | 1119/7 | 0 |
1987 | 119 | 187 | 259 | 114 | 679 | 485 | 364/2 | 0 | 0 |
1988 | 51 | 163 | 312 | 145 | 671 | 0 | 0 | 305/2 | 0 |
1989 | 87 | 352 | 352 | 103 | 894 | 0 | 298/2 | 706/4 | 176/1 |
1990 | 66 | 480 | 266 | 140 | 952 | 0 | 324/2 | 1089/5 | 789/5 |
1991 | 91 | 111 | 97 | 86 | 385 | 1305/7 | 162/1 | 1056/5 | 2450/10 |
1992 | 106 | 932 | 509 | 186 | 1733 | 594/3 | 2749/12 | 2467/9 | 2576/12 |
1993 | 214 | 562 | 427 | 368 | 1571 | 997/4 | 2103/9 | 2657/13 | 1677/8 |
1994 | 184 | 879 | 881 | 378 | 2322 | 418/2 | 4490/17 | 4768/20 | 928/4 |
1995 | 458 | 1265 | 300 | 1127 | 3150 | 855/4 | 1553/7 | 379/2 | 3255/13 |
1996 | 833 | 1403 | 658 | 597 | 3491 | 1624/8 | 2067/8 | 2411/11 | 2228/10 |
1997 | 572 | 851 | 1044 | 477 | 2944 | 2592/9 | 1619/7 | 2165/10 | 788/4 |
1998 | 394 | 571 | 514 | 259 | 1738 | 713/4 | 1369/7 | 618/4 | 827/5 |
1999 | 211 | 346 | 869 | 256 | 1682 | 203/1 | 1109/7 | 3031/15 | 1104/6 |
2000 | 335 | 548 | 350 | 278 | 1511 | 1056/6 | 1469/10 | 1321/8 | 2100/12 |
2001 | 606 | 544 | 456 | 130 | 1736 | 1211/8 | 1403/8 | 1291/7 | 556/3 |
2002 | 146 | 163 | 275 | 153 | 737 | 185/1 | 542/3 | 1315/6 | 0 |
2003 | 177 | 346 | 930 | 361 | 1814 | 352/2 | 1020/5 | 1013/5 | 580/3 |
2004 | 438 | 444 | 702 | 374 | 1958 | 326/2 | 176/1 | 1539/6 | 377/2 |
2005 | 224 | 365 | 1038 | 399 | 2026 | 359/2 | 138/1 | 378/2 | 347/2 |
2006 | 270 | 591 | 773 | 162 | 1796 | 165/1 | 388/2 | 967/6 | 0 |
2007 | 92 | 436 | 584 | 221 | 1333 | 0 | 0 | 784/3 | 164/1 |
2008 | 100 | 358 | 736 | 191 | 1385 | 838/4 | 1561/7 | 1397/6 | 643/4 |
2009 | 129 | 939 | 936 | 151 | 2155 | 471/2 | 944/4 | 159/1 | 0 |
2010 | 63 | 590 | 515 | 99 | 1267 | 0 | 441/2 | 702/3 | 211/1 |
Table 3.6.2
North East: Total catch-at-age numbers (in thousands).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1984 | 0 | 27 | 68 | 82 | 187 | 384 | 471 | 361 | 393 |
1985 | 3 | 29 | 32 | 90 | 140 | 333 | 411 | 376 | 521 |
1986 | 5 | 97 | 145 | 80 | 161 | 427 | 488 | 433 | 1099 |
1987 | 0 | 100 | 274 | 214 | 212 | 428 | 515 | 310 | 796 |
1988 | 0 | 104 | 659 | 541 | 190 | 181 | 348 | 330 | 1838 |
1989 | 0 | 39 | 218 | 464 | 618 | 759 | 697 | 542 | 1108 |
1990 | 244 | 316 | 337 | 553 | 660 | 601 | 613 | 526 | 1094 |
1991 | 134 | 338 | 389 | 195 | 130 | 140 | 144 | 154 | 481 |
1992 | 15 | 272 | 2703 | 2018 | 880 | 487 | 593 | 441 | 2798 |
1993 | 17 | 232 | 2710 | 2271 | 1097 | 570 | 346 | 181 | 1216 |
1994 | 14 | 375 | 2686 | 6766 | 3243 | 1249 | 486 | 180 | 1195 |
1995 | 10 | 470 | 3210 | 7334 | 5677 | 1869 | 700 | 389 | 959 |
1996 | 9 | 166 | 1134 | 3800 | 5910 | 4336 | 1826 | 567 | 948 |
1997 | 3 | 130 | 1143 | 3091 | 4781 | 4117 | 1919 | 475 | 511 |
1998 | 0 | 203 | 299 | 616 | 1186 | 2063 | 1489 | 1106 | 1080 |
1999 | 4 | 213 | 512 | 795 | 1353 | 1898 | 2102 | 1183 | 1127 |
2000 | 1 | 528 | 1669 | 793 | 658 | 896 | 1297 | 1375 | 1565 |
2001 | 3 | 102 | 1283 | 1017 | 531 | 423 | 899 | 744 | 1821 |
2002 | 0 | 200 | 1533 | 888 | 669 | 340 | 271 | 200 | 328 |
2003 | 0 | 24 | 1051 | 3319 | 2926 | 1908 | 1076 | 497 | 1269 |
2004 | 1 | 208 | 1594 | 2411 | 2048 | 1326 | 767 | 403 | 930 |
2005 | 9 | 299 | 861 | 1391 | 1459 | 2484 | 1188 | 702 | 1781 |
2006 | 0 | 559 | 570 | 1173 | 1288 | 1533 | 935 | 645 | 1528 |
2007 | 1 | 282 | 2120 | 1722 | 1008 | 1019 | 616 | 250 | 336 |
2008 | 6 | 481 | 1150 | 2364 | 1358 | 1011 | 599 | 277 | 360 |
2009 | 31 | 203 | 1632 | 3843 | 2422 | 999 | 873 | 750 | 573 |
2010 | 0 | 203 | 1281 | 1553 | 1629 | 1169 | 622 | 361 | 354 |
Table 3.6.3
North East: Mean weights-at-age (muscle) (kg) in total catch (also used for stock weights).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1984 | 0.012 | 0.012 | 0.017 | 0.018 | 0.020 | 0.021 | 0.024 | 0.023 | 0.025 |
1985 | 0.011 | 0.013 | 0.016 | 0.016 | 0.018 | 0.020 | 0.022 | 0.023 | 0.025 |
1986 | 0.013 | 0.015 | 0.018 | 0.021 | 0.023 | 0.024 | 0.025 | 0.026 | 0.028 |
1987 | 0.012 | 0.016 | 0.017 | 0.020 | 0.023 | 0.025 | 0.028 | 0.028 | 0.029 |
1988 | 0.012 | 0.012 | 0.016 | 0.019 | 0.019 | 0.020 | 0.019 | 0.022 | 0.022 |
1989 | 0.012 | 0.013 | 0.017 | 0.018 | 0.019 | 0.022 | 0.024 | 0.025 | 0.027 |
1990 | 0.015 | 0.018 | 0.018 | 0.020 | 0.022 | 0.023 | 0.024 | 0.026 | 0.029 |
1991 | 0.015 | 0.016 | 0.017 | 0.021 | 0.024 | 0.025 | 0.026 | 0.028 | 0.030 |
1992 | 0.014 | 0.014 | 0.015 | 0.018 | 0.020 | 0.022 | 0.024 | 0.026 | 0.027 |
1993 | 0.013 | 0.014 | 0.016 | 0.020 | 0.023 | 0.025 | 0.026 | 0.028 | 0.031 |
1994 | 0.014 | 0.015 | 0.015 | 0.017 | 0.020 | 0.022 | 0.023 | 0.025 | 0.027 |
1995 | 0.012 | 0.014 | 0.016 | 0.018 | 0.020 | 0.023 | 0.024 | 0.025 | 0.028 |
1996 | 0.014 | 0.016 | 0.017 | 0.018 | 0.020 | 0.023 | 0.025 | 0.028 | 0.030 |
1997 | 0.013 | 0.014 | 0.016 | 0.017 | 0.019 | 0.020 | 0.022 | 0.024 | 0.026 |
1998 | 0.013 | 0.017 | 0.017 | 0.019 | 0.020 | 0.022 | 0.024 | 0.025 | 0.027 |
1999 | 0.011 | 0.014 | 0.017 | 0.019 | 0.020 | 0.022 | 0.023 | 0.025 | 0.028 |
2000 | 0.013 | 0.016 | 0.018 | 0.022 | 0.023 | 0.025 | 0.026 | 0.028 | 0.031 |
2001 | 0.011 | 0.014 | 0.017 | 0.019 | 0.021 | 0.023 | 0.024 | 0.026 | 0.029 |
2002 | 0.012 | 0.015 | 0.016 | 0.019 | 0.023 | 0.025 | 0.025 | 0.027 | 0.029 |
2003 | 0.012 | 0.013 | 0.016 | 0.018 | 0.019 | 0.021 | 0.022 | 0.025 | 0.026 |
2004 | 0.015 | 0.015 | 0.017 | 0.020 | 0.021 | 0.023 | 0.024 | 0.024 | 0.027 |
2005 | 0.010 | 0.014 | 0.016 | 0.021 | 0.024 | 0.024 | 0.026 | 0.026 | 0.031 |
2006 | 0.012 | 0.016 | 0.016 | 0.019 | 0.021 | 0.023 | 0.025 | 0.026 | 0.030 |
2007 | 0.013 | 0.015 | 0.017 | 0.019 | 0.021 | 0.025 | 0.028 | 0.030 | 0.034 |
2008 | 0.018 | 0.020 | 0.018 | 0.018 | 0.022 | 0.026 | 0.028 | 0.031 | 0.035 |
2009 | 0.015 | 0.016 | 0.018 | 0.020 | 0.023 | 0.025 | 0.027 | 0.027 | 0.030 |
2010 | 0.015 | 0.017 | 0.018 | 0.018 | 0.020 | 0.022 | 0.025 | 0.027 | 0.030 |
Table 3.6.4
Summary of Marine Scotland Science North Sea scallop dredge surveys 1993-2010. Data from greyed out surveys are not used in the assessment.
Vessel | Cruise dates | Dredge Type | No. of dredges | Width (m) | No. of hauls | No. of scallops | ||
---|---|---|---|---|---|---|---|---|
From | To | NE | EC | |||||
R.V. Clupea (not used in the assessment) |
17-May-93 | 25-May-93 | A | 3 | 4.5 | 30 | 1565 | |
B | 3 | |||||||
M.F.V. Aspire | 01-Aug-94 | 26-Aug-94 | C | 6 | 7.35 | 66 | 49 | 23749 |
B | 5 | |||||||
M.F.V. Argo | 07-Aug-95 | 01-Sep-95 | A | 6 | 9 | 74 | 48 | 14677 |
B | 6 | |||||||
M.F.V. Aspire (not used in the assessment) |
18-Sep-95 | 20-Sep-95 | C | 6 | 7.35 | 20 | 3990 | |
B | 5 | |||||||
M.F.V. Argo | 12-Aug-96 | 06-Sep-96 | A | 6 | 9 | 77 | 46 | 15566 |
B | 6 | |||||||
M.F.V. Star of Annan (not used in the assessment) |
07-Oct-96 | 10-Oct-96 | A | 8 | 12 | 20 | 3466 | |
B | 8 | |||||||
R.V. Clupea | 11-Nov-97 | 01-Dec-97 | A | 3 | 4.5 | 58 | 0 | 3750 |
B | 3 | |||||||
R.V. Clupea | 21-Jan-99 | 09-Feb-99 | A | 3 | 4.5 | 71 | 38 | 5035 |
B | 3 | |||||||
R.V. Clupea | 23-Sep-99 | 30-Sep-99 | A | 3 | 4.5 | 77 | 39 | 4908 |
B | 3 | |||||||
R.V. Clupea | 25-Sep-00 | 13-Oct-00 | A | 3 | 4.5 | 65 | 36 | 4043 |
B | 3 | |||||||
R.V. Clupea | 15-Jun-01 | 02-Jul-01 | A | 3 | 4.5 | 75 | 45 | 4674 |
B | 3 | |||||||
R.V. Clupea | 15-Jul-02 | 02-Aug-02 | A | 3 | 4.5 | 96 | 45 | 6980 |
B | 3 | |||||||
R.V. Clupea | 02-Jul-03 | 21-Jul-03 | A | 3 | 4.5 | 87 | 46 | 7965 |
B | 3 | |||||||
R.V. Clupea | 23-Jun-04 | 12-Jul-04 | A | 3 | 4.5 | 71 | 40 | 5214 |
B | 3 | |||||||
R.V. Clupea | 17-Jun-05 | 11-Jul-05 | A | 3 | 4.5 | 88 | 44 | 6681 |
B | 3 | |||||||
R.V. Clupea | 23-May-06 | 12-Jun-06 | A | 3 | 4.5 | 84 | 44 | 8736 |
B | 3 | |||||||
R.V. Clupea | 18-Jun-07 | 08-Jul-07 | A | 3 | 4.5 | 77 | 46 | 6548 |
B | 3 | |||||||
R.V. Alba na Mara | 27-Jun-08 | 16-Jul-08 | A | 6 | 9 | 62 | 32 | 13110 |
B | 6 | |||||||
R.V. Alba na Mara | 01-Jul-09 | 20-Jul-09 | A | 6 | 9 | 56 | 43 | 11932 |
B | 6 | |||||||
R.V. Alba na Mara | 25-Jun-10 | 14-Jul-10 | A | 6 | 9 | 69 | 45 | 13913 |
B | 6 |
Dredge Type A: Standard commercial dredge. 2.5' wide. 9 tooth bar. Large belly rings.
Dredge Type B: Laboratory sampling dredge. 2.5' wide. 11 tooth bar. Small belly rings.
Dredge Type C: Small commercial dredge. 2' wide. 7 tooth bar. Large belly rings.
Table 3.6.5
North East: Available research-vessel survey data by age and year (numbers hour -1metre -1).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1994 | 0.09 | 1.18 | 12.38 | 16.74 | 8.60 | 3.62 | 1.71 | 1.10 | 6.85 |
1995 | 0.02 | 2.10 | 5.98 | 13.82 | 10.33 | 4.02 | 1.41 | 0.63 | 2.95 |
1996 | 0.00 | 0.22 | 4.47 | 7.12 | 11.53 | 7.90 | 2.20 | 0.68 | 2.30 |
1997 | 0.11 | 1.00 | 2.33 | 3.75 | 6.00 | 7.41 | 4.34 | 1.31 | 2.46 |
1998 | 0.12 | 1.28 | 1.32 | 1.77 | 1.59 | 3.18 | 4.39 | 4.14 | 3.63 |
1999 | 0.08 | 2.41 | 2.61 | 1.56 | 1.30 | 2.93 | 3.48 | 3.44 | 3.36 |
2000 | 0.10 | 2.77 | 4.93 | 2.18 | 1.21 | 1.85 | 2.52 | 2.77 | 2.41 |
2001 | 0.02 | 1.67 | 4.03 | 3.85 | 1.05 | 1.66 | 2.17 | 2.12 | 2.58 |
2002 | 0.04 | 4.40 | 7.12 | 4.97 | 2.22 | 1.51 | 1.87 | 2.16 | 2.16 |
2003 | 0.11 | 1.06 | 5.83 | 8.32 | 2.85 | 3.56 | 1.36 | 0.81 | 4.43 |
2004 | 0.47 | 1.62 | 2.64 | 5.23 | 4.05 | 2.12 | 1.05 | 1.10 | 2.46 |
2005 | 0.16 | 2.50 | 2.77 | 2.91 | 4.66 | 4.04 | 2.09 | 1.42 | 1.76 |
2006 | 0.01 | 3.34 | 5.00 | 4.50 | 3.53 | 4.46 | 3.09 | 2.65 | 3.51 |
2007 | 0.04 | 0.93 | 4.20 | 4.31 | 3.17 | 2.74 | 2.30 | 1.81 | 2.58 |
2008 | 0.05 | 1.43 | 5.39 | 7.58 | 4.52 | 3.50 | 2.64 | 1.28 | 3.94 |
2009 | 0.00 | 0.62 | 2.42 | 4.13 | 5.43 | 3.27 | 2.02 | 0.88 | 4.77 |
2010 | 0.01 | 1.79 | 3.50 | 5.57 | 4.98 | 4.32 | 2.62 | 0.87 | 4.65 |
Table 3.6.6
North East: Final TSA run parameter estimates.
Parameter | Notation | Description | 2011 |
---|---|---|---|
Initial fishing mortality | F(3, 1982) | Fishing mortality at age a in year y | 0.004 |
F(4, 1982) | 0.03 | ||
F(6, 1982) | 0.05 | ||
Survey selectivities | Ф(3) | Survey selectivity at age a | 0.01 |
Ф(4) | 0.03 | ||
Ф(5) | 0.05 | ||
Ф(6) | 0.05 | ||
Ф(7) | 0.07 | ||
Ф(8) | 0.09 | ||
Ф(9) | 0.10 | ||
Fishing mortality standard deviations | σ F | Transitory changes in overall F | 0.00 |
σ U | Persistent changes in selection (age effect in F) | 0.06 | |
σ V | Transitory changes in the year effect in F | 0.24 | |
σ Y | Persistent changes in the year effect in F | 0.26 | |
Survey catchability standard deviations | σ Ω | Transitory changes in survey catchability | 0.15 |
σ β | Persistent changes in survey catchability | 0.0 | |
Measurement coefficients of variation | cv landings | Coefficient of variation of landings-at-age data | 0.56 |
cv survey | Coefficient of variation of survey data | 0.32 | |
Recruitment | η² | Mean | 19.52 |
cv rec | Coefficient of variation of recruitment curve | 0.63 |
Table 3.6.7
North East: Estimated population abundance by age and year (in thousands) from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1984 | 8794 | 5384 | 4736 | 5640 | 7982 | 9571 | 7184 | 7217 |
1985 | 8943 | 7549 | 4549 | 3972 | 4612 | 6533 | 7834 | 11790 |
1986 | 9600 | 7672 | 6398 | 3826 | 3223 | 3745 | 5306 | 15939 |
1987 | 10550 | 8219 | 6422 | 5314 | 2963 | 2499 | 2906 | 16480 |
1988 | 6966 | 9019 | 6797 | 5263 | 4040 | 2259 | 1907 | 14785 |
1989 | 7910 | 5941 | 7356 | 5415 | 3866 | 2957 | 1663 | 12298 |
1990 | 14207 | 6720 | 4718 | 5516 | 3551 | 2642 | 2039 | 9660 |
1991 | 28094 | 12018 | 5371 | 3498 | 3482 | 2302 | 1774 | 7957 |
1992 | 47048 | 23965 | 9735 | 4305 | 2489 | 2451 | 1653 | 7160 |
1993 | 43852 | 39644 | 18541 | 6809 | 2661 | 1544 | 1536 | 5491 |
1994 | 26980 | 37174 | 31442 | 13956 | 4759 | 1802 | 1049 | 4785 |
1995 | 17956 | 22765 | 28417 | 22084 | 8144 | 2746 | 1067 | 3445 |
1996 | 10721 | 15084 | 16919 | 19184 | 12359 | 4610 | 1554 | 2532 |
1997 | 7749 | 9015 | 11448 | 11757 | 11442 | 7349 | 2767 | 2418 |
1998 | 8985 | 6553 | 6927 | 8167 | 7393 | 7174 | 4562 | 3194 |
1999 | 15444 | 7643 | 5143 | 5114 | 5450 | 4951 | 4813 | 5191 |
2000 | 18973 | 13116 | 6075 | 3770 | 3401 | 3650 | 3311 | 6672 |
2001 | 23493 | 16121 | 10403 | 4481 | 2474 | 2241 | 2425 | 6613 |
2002 | 22245 | 19906 | 12811 | 7799 | 3063 | 1694 | 1537 | 6205 |
2003 | 14118 | 18946 | 16051 | 9852 | 5615 | 2209 | 1220 | 5574 |
2004 | 14479 | 11884 | 14195 | 10844 | 5699 | 3254 | 1277 | 3928 |
2005 | 17965 | 12231 | 9114 | 10037 | 6727 | 3518 | 2013 | 3216 |
2006 | 24360 | 15139 | 9258 | 6270 | 5984 | 3998 | 2082 | 3100 |
2007 | 19416 | 20558 | 11604 | 6501 | 3851 | 3656 | 2447 | 3172 |
2008 | 16715 | 16445 | 16098 | 8446 | 4270 | 2529 | 2400 | 3689 |
2009 | 13544 | 14151 | 12868 | 11675 | 5539 | 2797 | 1658 | 3989 |
2010 | 14914 | 11398 | 10716 | 8805 | 7038 | 3339 | 1687 | 3405 |
Table 3.6.8
North East: Standard errors of estimates of population abundance by age and year (in thousands) from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1984 | 1.370 | 0.835 | 0.654 | 0.811 | 1.090 | 1.151 | 1.412 | 2.440 |
1985 | 2.194 | 1.176 | 0.703 | 0.547 | 0.670 | 0.907 | 0.957 | 2.351 |
1986 | 3.554 | 1.883 | 0.999 | 0.595 | 0.451 | 0.554 | 0.752 | 2.193 |
1987 | 3.536 | 3.043 | 1.590 | 0.841 | 0.469 | 0.360 | 0.444 | 2.021 |
1988 | 1.281 | 3.026 | 2.572 | 1.338 | 0.647 | 0.367 | 0.286 | 1.791 |
1989 | 1.191 | 1.094 | 2.531 | 2.126 | 0.986 | 0.480 | 0.279 | 1.535 |
1990 | 3.061 | 1.018 | 0.918 | 2.116 | 1.577 | 0.753 | 0.379 | 1.367 |
1991 | 4.161 | 2.618 | 0.852 | 0.757 | 1.529 | 1.157 | 0.562 | 1.234 |
1992 | 4.155 | 3.563 | 2.210 | 0.713 | 0.573 | 1.187 | 0.902 | 1.242 |
1993 | 3.502 | 3.507 | 2.823 | 1.688 | 0.431 | 0.347 | 0.737 | 1.155 |
1994 | 2.277 | 2.974 | 2.839 | 2.245 | 1.073 | 0.292 | 0.236 | 1.055 |
1995 | 2.012 | 1.928 | 2.430 | 2.201 | 1.375 | 0.657 | 0.192 | 0.746 |
1996 | 0.972 | 1.695 | 1.483 | 1.760 | 1.249 | 0.742 | 0.355 | 0.474 |
1997 | 0.880 | 0.818 | 1.276 | 1.070 | 1.039 | 0.736 | 0.414 | 0.377 |
1998 | 1.184 | 0.742 | 0.634 | 0.886 | 0.626 | 0.636 | 0.445 | 0.387 |
1999 | 1.946 | 1.002 | 0.569 | 0.463 | 0.535 | 0.419 | 0.438 | 0.515 |
2000 | 2.178 | 1.646 | 0.762 | 0.401 | 0.283 | 0.336 | 0.286 | 0.613 |
2001 | 2.230 | 1.841 | 1.253 | 0.524 | 0.235 | 0.186 | 0.223 | 0.600 |
2002 | 2.730 | 1.889 | 1.443 | 0.923 | 0.338 | 0.165 | 0.140 | 0.593 |
2003 | 1.304 | 2.333 | 1.557 | 1.138 | 0.683 | 0.254 | 0.130 | 0.571 |
2004 | 1.649 | 1.101 | 1.789 | 1.133 | 0.654 | 0.411 | 0.159 | 0.452 |
2005 | 2.170 | 1.398 | 0.859 | 1.275 | 0.703 | 0.406 | 0.260 | 0.379 |
2006 | 2.962 | 1.837 | 1.051 | 0.611 | 0.744 | 0.450 | 0.257 | 0.385 |
2007 | 2.376 | 2.518 | 1.443 | 0.777 | 0.408 | 0.513 | 0.327 | 0.436 |
2008 | 2.743 | 2.018 | 2.009 | 1.091 | 0.530 | 0.296 | 0.372 | 0.535 |
2009 | 2.347 | 2.332 | 1.641 | 1.565 | 0.777 | 0.390 | 0.228 | 0.639 |
2010 | 5.396 | 1.980 | 1.823 | 1.247 | 1.083 | 0.547 | 0.285 | 0.612 |
Table 3.6.9
North East: Estimates of fishing mortality by age and year from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1984 | 0.003 | 0.013 | 0.019 | 0.050 | 0.050 | 0.050 | 0.050 | 0.050 |
1985 | 0.003 | 0.015 | 0.022 | 0.058 | 0.058 | 0.058 | 0.058 | 0.058 |
1986 | 0.006 | 0.028 | 0.041 | 0.104 | 0.104 | 0.104 | 0.104 | 0.104 |
1987 | 0.007 | 0.034 | 0.049 | 0.121 | 0.121 | 0.121 | 0.121 | 0.121 |
1988 | 0.009 | 0.045 | 0.067 | 0.154 | 0.154 | 0.154 | 0.154 | 0.154 |
1989 | 0.012 | 0.064 | 0.097 | 0.220 | 0.220 | 0.220 | 0.220 | 0.220 |
1990 | 0.013 | 0.071 | 0.111 | 0.235 | 0.235 | 0.235 | 0.235 | 0.235 |
1991 | 0.009 | 0.049 | 0.077 | 0.155 | 0.155 | 0.155 | 0.155 | 0.155 |
1992 | 0.018 | 0.105 | 0.170 | 0.324 | 0.324 | 0.324 | 0.324 | 0.324 |
1993 | 0.013 | 0.077 | 0.127 | 0.237 | 0.237 | 0.237 | 0.237 | 0.237 |
1994 | 0.021 | 0.122 | 0.206 | 0.372 | 0.372 | 0.372 | 0.372 | 0.372 |
1995 | 0.024 | 0.144 | 0.241 | 0.428 | 0.428 | 0.428 | 0.428 | 0.428 |
1996 | 0.021 | 0.126 | 0.212 | 0.368 | 0.368 | 0.368 | 0.368 | 0.368 |
1997 | 0.019 | 0.113 | 0.190 | 0.318 | 0.318 | 0.318 | 0.318 | 0.318 |
1998 | 0.015 | 0.089 | 0.149 | 0.245 | 0.245 | 0.245 | 0.245 | 0.245 |
1999 | 0.015 | 0.092 | 0.154 | 0.247 | 0.247 | 0.247 | 0.247 | 0.247 |
2000 | 0.016 | 0.096 | 0.162 | 0.254 | 0.254 | 0.254 | 0.254 | 0.254 |
2001 | 0.014 | 0.084 | 0.143 | 0.225 | 0.225 | 0.225 | 0.225 | 0.225 |
2002 | 0.011 | 0.065 | 0.113 | 0.179 | 0.179 | 0.179 | 0.179 | 0.179 |
2003 | 0.023 | 0.138 | 0.242 | 0.397 | 0.397 | 0.397 | 0.397 | 0.397 |
2004 | 0.019 | 0.114 | 0.200 | 0.328 | 0.328 | 0.328 | 0.328 | 0.328 |
2005 | 0.021 | 0.126 | 0.221 | 0.371 | 0.371 | 0.371 | 0.371 | 0.371 |
2006 | 0.020 | 0.116 | 0.205 | 0.339 | 0.339 | 0.339 | 0.339 | 0.339 |
2007 | 0.016 | 0.094 | 0.168 | 0.270 | 0.270 | 0.270 | 0.270 | 0.270 |
2008 | 0.017 | 0.096 | 0.172 | 0.272 | 0.272 | 0.272 | 0.272 | 0.272 |
2009 | 0.022 | 0.127 | 0.229 | 0.356 | 0.356 | 0.356 | 0.356 | 0.356 |
2010 | 0.016 | 0.095 | 0.170 | 0.263 | 0.263 | 0.263 | 0.263 | 0.263 |
Table 3.6.10
North East: Standard errors of estimates of log fishing mortality by age and year from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|
1984 | 0.258 | 0.268 | 0.276 | 0.214 | 0.214 | 0.214 | 0.214 | 0.214 |
1985 | 0.250 | 0.259 | 0.266 | 0.209 | 0.209 | 0.209 | 0.209 | 0.209 |
1986 | 0.242 | 0.247 | 0.252 | 0.200 | 0.200 | 0.200 | 0.200 | 0.200 |
1987 | 0.239 | 0.242 | 0.245 | 0.199 | 0.199 | 0.199 | 0.199 | 0.199 |
1988 | 0.236 | 0.237 | 0.239 | 0.197 | 0.197 | 0.197 | 0.197 | 0.197 |
1989 | 0.234 | 0.235 | 0.236 | 0.198 | 0.198 | 0.198 | 0.198 | 0.198 |
1990 | 0.228 | 0.226 | 0.225 | 0.187 | 0.187 | 0.187 | 0.187 | 0.187 |
1991 | 0.232 | 0.229 | 0.228 | 0.190 | 0.190 | 0.190 | 0.190 | 0.190 |
1992 | 0.224 | 0.221 | 0.218 | 0.177 | 0.177 | 0.177 | 0.177 | 0.177 |
1993 | 0.228 | 0.226 | 0.221 | 0.181 | 0.181 | 0.181 | 0.181 | 0.181 |
1994 | 0.219 | 0.216 | 0.211 | 0.168 | 0.168 | 0.168 | 0.168 | 0.168 |
1995 | 0.211 | 0.207 | 0.202 | 0.157 | 0.157 | 0.157 | 0.157 | 0.157 |
1996 | 0.213 | 0.209 | 0.203 | 0.160 | 0.160 | 0.160 | 0.160 | 0.160 |
1997 | 0.213 | 0.208 | 0.203 | 0.161 | 0.161 | 0.161 | 0.161 | 0.161 |
1998 | 0.220 | 0.216 | 0.212 | 0.175 | 0.175 | 0.175 | 0.175 | 0.175 |
1999 | 0.218 | 0.213 | 0.209 | 0.169 | 0.169 | 0.169 | 0.169 | 0.169 |
2000 | 0.218 | 0.214 | 0.210 | 0.170 | 0.170 | 0.170 | 0.170 | 0.170 |
2001 | 0.224 | 0.222 | 0.217 | 0.181 | 0.181 | 0.181 | 0.181 | 0.181 |
2002 | 0.231 | 0.229 | 0.225 | 0.188 | 0.188 | 0.188 | 0.188 | 0.188 |
2003 | 0.215 | 0.211 | 0.206 | 0.157 | 0.157 | 0.157 | 0.157 | 0.157 |
2004 | 0.223 | 0.219 | 0.213 | 0.169 | 0.169 | 0.169 | 0.169 | 0.169 |
2005 | 0.224 | 0.220 | 0.214 | 0.169 | 0.169 | 0.169 | 0.169 | 0.169 |
2006 | 0.232 | 0.229 | 0.224 | 0.180 | 0.180 | 0.180 | 0.180 | 0.180 |
2007 | 0.239 | 0.238 | 0.233 | 0.187 | 0.187 | 0.187 | 0.187 | 0.187 |
2008 | 0.248 | 0.248 | 0.244 | 0.195 | 0.195 | 0.195 | 0.195 | 0.195 |
2009 | 0.256 | 0.257 | 0.253 | 0.201 | 0.201 | 0.201 | 0.201 | 0.201 |
2010 | 0.291 | 0.293 | 0.291 | 0.241 | 0.241 | 0.241 | 0.241 | 0.241 |
Table 3.6.11
North East: Stock summary from the final TSA run.
Catch (t) | Catch estimate (t) | SSB (t) | Recruitment (1000s) | Mean F(4-6) | |
---|---|---|---|---|---|
1984 | 44 | 42 | 1138 | 8794 | 0.028 |
1985 | 42 | 45 | 1092 | 8943 | 0.032 |
1986 | 74 | 87 | 1260 | 9600 | 0.058 |
1987 | 72 | 98 | 1263 | 10550 | 0.068 |
1988 | 84 | 93 | 948 | 6966 | 0.089 |
1989 | 101 | 135 | 969 | 7910 | 0.127 |
1990 | 111 | 137 | 1071 | 14207 | 0.139 |
1991 | 45 | 90 | 1286 | 28094 | 0.094 |
1992 | 210 | 182 | 1629 | 47048 | 0.200 |
1993 | 183 | 186 | 2096 | 43852 | 0.147 |
1994 | 301 | 328 | 2078 | 26980 | 0.233 |
1995 | 400 | 419 | 1945 | 17956 | 0.271 |
1996 | 398 | 345 | 1635 | 10721 | 0.235 |
1997 | 313 | 236 | 1191 | 7749 | 0.207 |
1998 | 182 | 169 | 1094 | 8985 | 0.161 |
1999 | 205 | 149 | 1046 | 15444 | 0.164 |
2000 | 214 | 162 | 1239 | 18973 | 0.171 |
2001 | 157 | 136 | 1260 | 23493 | 0.151 |
2002 | 90 | 125 | 1415 | 22245 | 0.119 |
2003 | 242 | 260 | 1305 | 14118 | 0.259 |
2004 | 205 | 221 | 1277 | 14479 | 0.214 |
2005 | 246 | 249 | 1284 | 17965 | 0.240 |
2006 | 189 | 201 | 1324 | 24360 | 0.220 |
2007 | 156 | 179 | 1378 | 19416 | 0.178 |
2008 | 167 | 200 | 1491 | 16715 | 0.180 |
2009 | 251 | 262 | 1376 | 13544 | 0.237 |
2010 | 149 | 170 | 1214 | 14914 | 0.176 |
Table 3.7.1
Shetland: Quarterly dredge landings ( UK vessels into Scotland) and market sample details 1985-2010.
Landings (tonnes) | Numbers Aged and Measured/Boats Sampled | ||||||||
---|---|---|---|---|---|---|---|---|---|
Qtr1 | Qtr2 | Qtr3 | Qtr4 | Total | Qtr1 | Qtr2 | Qtr3 | Qtr4 | |
1985 | 80 | 28 | 22 | 82 | 212 | 710/7 | 1547/15 | 700/7 | 691/6 |
1986 | 125 | 110 | 61 | 66 | 362 | 1923/19 | 1604/15 | 1899/19 | 579/6 |
1987 | 118 | 72 | 26 | 95 | 311 | 1356/13 | 844/7 | 905/8 | 1706/17 |
1988 | 123 | 98 | 59 | 79 | 359 | 0 | 749/7 | 1480/15 | 748/7 |
1989 | 91 | 208 | 130 | 108 | 537 | 0 | 1722/15 | 3146/26 | 1078/11 |
1990 | 87 | 167 | 89 | 104 | 447 | 712/7 | 2493/18 | 2615/19 | 1225/9 |
1991 | 114 | 94 | 95 | 102 | 405 | 1688/17 | 1127/11 | 1998/19 | 1307/13 |
1992 | 80 | 156 | 130 | 168 | 534 | 1752/17 | 1558/13 | 2278/21 | 834/7 |
1993 | 70 | 141 | 103 | 216 | 530 | 1382/10 | 925/8 | 4288/39 | 2372/16 |
1994 | 134 | 162 | 199 | 108 | 603 | 1394/13 | 2437/19 | 3375/30 | 2098/17 |
1995 | 178 | 234 | 174 | 157 | 743 | 1432/10 | 1034/9 | 4210/23 | 2289/15 |
1996 | 136 | 214 | 154 | 170 | 674 | 2837/24 | 1513/12 | 2219/19 | 3294/22 |
1997 | 107 | 168 | 205 | 453 | 933 | 1003/7 | 1321/10 | 5072/37 | 813/7 |
1998 | 244 | 156 | 188 | 332 | 920 | 1399/12 | 367/3 | 3511/27 | 1250/12 |
1999 | 171 | 182 | 214 | 181 | 748 | 1565/16 | 1317/12 | 4196/41 | 1201/10 |
2000 | 79 | 104 | 73 | 82 | 338 | 1352/13 | 637/6 | 977/7 | 1596/14 |
2001 | 100 | 138 | 128 | 125 | 491 | 1636/16 | 303/3 | 3479/33 | 1984/17 |
2002 | 123 | 143 | 182 | 111 | 559 | 940/6 | 1112/11 | 3807/35 | 1656/15 |
2003 | 170 | 200 | 198 | 188 | 756 | 1638/15 | 1546/12 | 2478/23 | 3654/33 |
2004 | 247 | 213 | 228 | 207 | 895 | 2819/24 | 628/6 | 3131/28 | 2120/19 |
2005 | 149 | 220 | 170 | 181 | 720 | 3127/26 | 1938/17 | 2897/25 | 816/7 |
2006 | 153 | 247 | 203 | 169 | 772 | 3339/29 | 1632/15 | 4081/37 | 2265/20 |
2007 | 205 | 200 | 210 | 242 | 857 | 2965/28 | 3881/36 | 3175/29 | 1804/17 |
2008 | 169 | 260 | 247 | 203 | 879 | 2194/21 | 1778/17 | 549/23 | 3479/33 |
2009 | 191 | 273 | 233 | 217 | 914 | 565/6 | 1807/18 | 1867/18 | 1737/17 |
2010 | 231 | 310 | 290 | 240 | 1071 | 1480/15 | 1797/18 | 1800/18 | 1435/14 |
Table 3.7.2
Shetland: Total catch-at-age numbers (in thousands).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1986 | 0 | 26 | 85 | 274 | 463 | 379 | 244 | 250 | 308 |
1987 | 3 | 70 | 224 | 219 | 200 | 204 | 177 | 120 | 325 |
1988 | 5 | 127 | 284 | 306 | 266 | 186 | 159 | 125 | 373 |
1989 | 17 | 126 | 305 | 346 | 374 | 411 | 378 | 273 | 559 |
1990 | 19 | 222 | 209 | 262 | 334 | 291 | 253 | 226 | 574 |
1991 | 9 | 118 | 208 | 242 | 267 | 285 | 316 | 200 | 609 |
1992 | 123 | 543 | 479 | 382 | 297 | 189 | 221 | 176 | 660 |
1993 | 1 | 113 | 1175 | 882 | 338 | 160 | 138 | 150 | 485 |
1994 | 0 | 112 | 868 | 1736 | 441 | 176 | 105 | 83 | 376 |
1995 | 0 | 108 | 843 | 1638 | 1221 | 279 | 133 | 101 | 309 |
1996 | 0 | 3 | 348 | 1120 | 1146 | 698 | 222 | 115 | 297 |
1997 | 0 | 67 | 804 | 1522 | 1213 | 911 | 574 | 192 | 304 |
1998 | 0 | 26 | 246 | 668 | 1076 | 1087 | 909 | 635 | 619 |
1999 | 1 | 39 | 181 | 426 | 901 | 927 | 677 | 426 | 496 |
2000 | 14 | 82 | 190 | 217 | 272 | 345 | 348 | 176 | 219 |
2001 | 0 | 24 | 723 | 540 | 260 | 271 | 344 | 179 | 480 |
2002 | 0 | 9 | 248 | 1089 | 665 | 304 | 289 | 211 | 461 |
2003 | 0 | 46 | 566 | 973 | 969 | 484 | 278 | 173 | 620 |
2004 | 0 | 149 | 772 | 1358 | 1069 | 708 | 305 | 138 | 369 |
2005 | 3 | 408 | 651 | 783 | 854 | 566 | 330 | 167 | 216 |
2006 | 11 | 335 | 904 | 667 | 659 | 568 | 395 | 192 | 495 |
2007 | 0 | 78 | 872 | 1078 | 579 | 438 | 331 | 169 | 207 |
2008 | 0 | 72 | 535 | 1269 | 808 | 648 | 519 | 334 | 430 |
2009 | 0 | 131 | 508 | 859 | 986 | 602 | 500 | 402 | 462 |
2010 | 0 | 144 | 792 | 1166 | 1098 | 926 | 629 | 318 | 339 |
Table 3.7.3
Shetland: Mean weights-at-age (muscle) (kg) in total catch (also used for stock weights).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1986 | 0.015 | 0.019 | 0.020 | 0.021 | 0.022 | 0.023 | 0.026 | 0.033 | 0.031 |
1987 | 0.017 | 0.019 | 0.022 | 0.024 | 0.027 | 0.028 | 0.029 | 0.031 | 0.037 |
1988 | 0.018 | 0.020 | 0.022 | 0.025 | 0.027 | 0.028 | 0.029 | 0.030 | 0.034 |
1989 | 0.016 | 0.019 | 0.020 | 0.022 | 0.024 | 0.026 | 0.028 | 0.030 | 0.034 |
1990 | 0.016 | 0.018 | 0.020 | 0.022 | 0.024 | 0.026 | 0.028 | 0.030 | 0.031 |
1991 | 0.014 | 0.018 | 0.020 | 0.023 | 0.024 | 0.026 | 0.027 | 0.029 | 0.031 |
1992 | 0.015 | 0.018 | 0.020 | 0.022 | 0.025 | 0.027 | 0.028 | 0.029 | 0.031 |
1993 | 0.012 | 0.017 | 0.019 | 0.021 | 0.024 | 0.026 | 0.028 | 0.029 | 0.033 |
1994 | 0.014 | 0.017 | 0.019 | 0.021 | 0.024 | 0.028 | 0.028 | 0.030 | 0.032 |
1995 | 0.014 | 0.016 | 0.019 | 0.022 | 0.022 | 0.027 | 0.030 | 0.030 | 0.032 |
1996 | 0.013 | 0.016 | 0.018 | 0.020 | 0.023 | 0.026 | 0.030 | 0.030 | 0.033 |
1997 | 0.014 | 0.017 | 0.018 | 0.020 | 0.023 | 0.025 | 0.027 | 0.030 | 0.032 |
1998 | 0.018 | 0.017 | 0.019 | 0.020 | 0.022 | 0.024 | 0.026 | 0.028 | 0.030 |
1999 | 0.018 | 0.017 | 0.019 | 0.021 | 0.023 | 0.025 | 0.027 | 0.030 | 0.033 |
2000 | 0.018 | 0.019 | 0.020 | 0.021 | 0.023 | 0.025 | 0.027 | 0.030 | 0.032 |
2001 | 0.018 | 0.017 | 0.019 | 0.022 | 0.024 | 0.026 | 0.027 | 0.028 | 0.032 |
2002 | 0.018 | 0.017 | 0.019 | 0.021 | 0.023 | 0.026 | 0.027 | 0.028 | 0.031 |
2003 | 0.018 | 0.018 | 0.020 | 0.023 | 0.025 | 0.027 | 0.028 | 0.030 | 0.034 |
2004 | 0.020 | 0.018 | 0.020 | 0.023 | 0.026 | 0.028 | 0.029 | 0.031 | 0.035 |
2005 | 0.016 | 0.019 | 0.021 | 0.023 | 0.025 | 0.028 | 0.029 | 0.032 | 0.036 |
2006 | 0.017 | 0.019 | 0.022 | 0.023 | 0.025 | 0.027 | 0.029 | 0.030 | 0.034 |
2007 | 0.018 | 0.018 | 0.020 | 0.025 | 0.027 | 0.030 | 0.032 | 0.035 | 0.038 |
2008 | 0.017 | 0.019 | 0.021 | 0.023 | 0.026 | 0.028 | 0.030 | 0.032 | 0.035 |
2009 | 0.017 | 0.020 | 0.022 | 0.025 | 0.027 | 0.030 | 0.032 | 0.034 | 0.036 |
2010 | 0.017 | 0.020 | 0.022 | 0.025 | 0.027 | 0.030 | 0.032 | 0.033 | 0.035 |
Table 3.7.4
Summary of Marine Scotland Science Shetland scallop dredge surveys 1988-2010.
Vessel | Cruise dates | Dredge type | No. of dredges | Width (m) | No. of hauls | No. of scallops | |
---|---|---|---|---|---|---|---|
From | To | ||||||
M.F.V. Cornucopia | 09-May-95 | 20-May-95 | A | 5 | 7.62 | 89 | 8342 |
B | 5 | ||||||
M.F.V. Cornucopia | 08-May-96 | 17-May-96 | A | 5 | 7.62 | 102 | 8350 |
B | 5 | ||||||
R.V. Clupea | 28-Jan-98 | 11-Feb-98 | A | 3 | 4.5 | 90 | 5511 |
B | 3 | ||||||
R.V. Clupea | 10-Mar-99 | 23-Mar-99 | A | 3 | 4.5 | 80 | 4893 |
B | 3 | ||||||
R.V. Clupea | 02-Mar-00 | 13-Mar-00 | A | 3 | 4.5 | 41 | 2855 |
B | 3 | ||||||
R.V. Clupea | 14-Feb-01 | 27-Feb-01 | A | 3 | 4.5 | 86 | 5601 |
B | 3 | ||||||
R.V. Clupea | 04-Dec-01 | 17-Dec-01 | A | 3 | 4.5 | 91 | 5402 |
B | 3 | ||||||
R.V. Clupea | 04-Mar-03 | 17-Mar-03 | A | 3 | 4.5 | 91 | 5339 |
B | 3 | ||||||
R.V. Clupea | 27-Jan-04 | 09-Feb-04 | A | 3 | 4.5 | 50 | 2447 |
B | 3 | ||||||
R.V. Clupea | 15-Feb-05 | 01-Mar-05 | A | 3 | 4.5 | 93 | 5667 |
B | 3 | ||||||
R.V. Clupea | 09-Mar-06 | 27-Mar-06 | A | 3 | 4.5 | 89 | 5630 |
B | 3 | ||||||
R.V. Clupea | 15-Mar-07 | 31-Mar-07 | A | 3 | 4.5 | 82 | 5542 |
B | 3 | ||||||
R.V. Clupea | 24-Jan-08 | 06-Feb-08 | A | 3 | 4.5 | 49 | 3219 |
B | 3 | ||||||
R.V. Alba na Mara | 17-Feb-09 | 03-Mar-09 | A | 6 | 9 | 53 | 6432 |
B | 6 | ||||||
R.V. Alba na Mara | 15-Mar-10 | 27-Mar-10 | A | 6 | 9 | 87 | 12870 |
B | 6 |
Dredge Type A: Standard commercial dredge. 2.5' wide. 9 tooth bar. Large belly rings.
Dredge Type B: Laboratory sampling dredge. 2.5' wide. 11 tooth bar. Small belly rings.
Table 3.7.5
Shetland: Available research-vessel survey data by age and year (numbers hour -1metre -1).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1995 | 0.161 | 2.902 | 6.975 | 9.199 | 2.609 | 0.936 | 0.778 | 0.441 | 2.275 |
1996 | 0.013 | 1.133 | 4.302 | 7.692 | 5.003 | 0.946 | 0.561 | 0.306 | 1.735 |
1997 | NA | NA | NA | NA | NA | NA | NA | NA | NA |
1998 | 0.033 | 0.531 | 1.927 | 2.410 | 5.709 | 5.097 | 5.192 | 3.074 | 2.228 |
1999 | 0.072 | 1.202 | 1.099 | 2.208 | 3.282 | 6.404 | 5.480 | 3.416 | 2.585 |
2000 | 0.032 | 2.643 | 5.000 | 1.975 | 3.227 | 5.616 | 6.062 | 3.832 | 1.921 |
2001 | 0.025 | 1.066 | 8.413 | 3.953 | 1.890 | 2.892 | 3.249 | 2.728 | 3.552 |
2002 | 0.070 | 2.534 | 6.798 | 3.731 | 1.931 | 3.142 | 3.128 | 2.179 | 1.744 |
2003 | 0.009 | 0.611 | 4.298 | 5.423 | 4.914 | 2.422 | 2.273 | 2.539 | 2.427 |
2004 | 0.009 | 0.556 | 1.876 | 5.118 | 4.854 | 3.315 | 2.031 | 1.020 | 3.506 |
2005 | 0.051 | 3.931 | 3.128 | 4.381 | 4.372 | 3.764 | 2.316 | 1.532 | 2.826 |
2006 | 0.015 | 2.026 | 3.602 | 4.188 | 3.927 | 3.592 | 3.222 | 2.887 | 4.698 |
2007 | 0.032 | 1.489 | 5.316 | 4.710 | 3.892 | 3.312 | 3.216 | 3.158 | 4.338 |
2008 | 0.009 | 0.726 | 2.168 | 7.764 | 6.349 | 2.104 | 2.694 | 2.812 | 4.535 |
2009 | 0.046 | 1.092 | 2.332 | 4.922 | 4.560 | 3.547 | 2.686 | 0.949 | 6.897 |
2010 | 0.017 | 1.834 | 3.525 | 5.465 | 5.362 | 4.070 | 2.435 | 0.860 | 8.158 |
Table 3.7.6
Shetland: Final TSA run parameter estimates.
Parameter | Notation | Description | 2011 |
---|---|---|---|
Initial fishing mortality | F(3, 1986) | Fishing mortality at age a in year y | 0.004 |
F(4, 1986) | 0.02 | ||
F(7, 1986) | 0.31 | ||
Survey selectivities | Ф(3) | Survey selectivity at age a | 0.03 |
Ф(4) | 0.08 | ||
Ф(5) | 0.12 | ||
Ф(6) | 0.14 | ||
Ф(7) | 0.20 | ||
Ф(8) | 0.27 | ||
Ф(9) | 0.12 | ||
Fishing mortality standard deviations | σ F | Transitory changes in overall F | 0.15 |
σ U | Persistent changes in selection (age effect in F) | 0.37 | |
σ V | Transitory changes in the year effect in F | 0.00 | |
σ Y | Persistent changes in the year effect in F | 0.26 | |
Survey catchability standard deviations | σ Ω | Transitory changes in survey catchability | 0.16 |
σ β | Persistent changes in survey catchability | 0.03 | |
Measurement coefficients of variation | cv landings | Coefficient of variation of landings-at-age data | 0.13 |
cv survey | Coefficient of variation of survey data | 0.33 | |
Recruitment | η² | Mean | 7.41 |
cv rec | Coefficient of variation of recruitment curve | 0.35 |
Table 3.7.7
Shetland: Estimated population abundance by age and year (in thousands) from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | |
---|---|---|---|---|---|---|---|
1986 | 5834 | 4470 | 4350 | 3936 | 2235 | 1547 | 3505 |
1987 | 4750 | 4995 | 3762 | 3495 | 2980 | 1587 | 3603 |
1988 | 3117 | 3979 | 4024 | 2999 | 2745 | 2252 | 3982 |
1989 | 2609 | 2526 | 3150 | 3179 | 2314 | 2133 | 4766 |
1990 | 3419 | 2125 | 1893 | 2372 | 2384 | 1477 | 4512 |
1991 | 7435 | 2694 | 1652 | 1381 | 1713 | 1675 | 4195 |
1992 | 14898 | 6258 | 2098 | 1188 | 938 | 1152 | 4010 |
1993 | 12457 | 11752 | 4534 | 1500 | 789 | 611 | 3461 |
1994 | 11063 | 10359 | 9028 | 2454 | 998 | 533 | 2786 |
1995 | 10354 | 9321 | 8193 | 6111 | 1688 | 693 | 2309 |
1996 | 8225 | 8793 | 7401 | 5603 | 3936 | 1222 | 2207 |
1997 | 4871 | 7029 | 7126 | 5293 | 3805 | 2626 | 2286 |
1998 | 3507 | 4134 | 4784 | 4720 | 3430 | 2424 | 3166 |
1999 | 5453 | 2991 | 3078 | 3412 | 3113 | 1918 | 2861 |
2000 | 9391 | 4655 | 2327 | 2231 | 2139 | 1828 | 2734 |
2001 | 7822 | 8009 | 3743 | 1792 | 1610 | 1490 | 3129 |
2002 | 8342 | 6695 | 6218 | 2726 | 1301 | 1111 | 3053 |
2003 | 6947 | 7157 | 5512 | 4346 | 1751 | 830 | 2658 |
2004 | 6967 | 5923 | 5521 | 3819 | 2795 | 1038 | 1994 |
2005 | 9389 | 5766 | 4329 | 3489 | 2253 | 1702 | 1844 |
2006 | 9448 | 7644 | 4294 | 3029 | 2223 | 1442 | 2312 |
2007 | 7096 | 7824 | 5669 | 3064 | 2063 | 1392 | 2281 |
2008 | 6239 | 5964 | 5943 | 3860 | 2105 | 1385 | 2466 |
2009 | 6639 | 5268 | 4619 | 3886 | 2527 | 1155 | 2008 |
2010 | 7206 | 5593 | 4063 | 3184 | 2372 | 1395 | 1516 |
Table 3.7.8
Shetland: Standard errors of estimates of population abundance by age and year (in thousands) from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | |
---|---|---|---|---|---|---|---|
1986 | 0.591 | 0.361 | 0.424 | 0.454 | 0.219 | 0.170 | 0.313 |
1987 | 0.720 | 0.508 | 0.310 | 0.362 | 0.383 | 0.174 | 0.330 |
1988 | 0.637 | 0.621 | 0.431 | 0.254 | 0.299 | 0.317 | 0.390 |
1989 | 0.486 | 0.548 | 0.527 | 0.366 | 0.218 | 0.244 | 0.479 |
1990 | 0.508 | 0.417 | 0.468 | 0.450 | 0.316 | 0.185 | 0.472 |
1991 | 0.472 | 0.437 | 0.354 | 0.398 | 0.381 | 0.260 | 0.488 |
1992 | 0.664 | 0.404 | 0.374 | 0.303 | 0.337 | 0.312 | 0.512 |
1993 | 0.512 | 0.586 | 0.322 | 0.308 | 0.249 | 0.273 | 0.496 |
1994 | 0.513 | 0.432 | 0.491 | 0.261 | 0.255 | 0.205 | 0.429 |
1995 | 0.533 | 0.437 | 0.371 | 0.372 | 0.218 | 0.213 | 0.355 |
1996 | 0.422 | 0.460 | 0.383 | 0.296 | 0.269 | 0.170 | 0.260 |
1997 | 0.315 | 0.362 | 0.390 | 0.307 | 0.227 | 0.193 | 0.181 |
1998 | 0.197 | 0.270 | 0.294 | 0.285 | 0.227 | 0.159 | 0.190 |
1999 | 0.324 | 0.169 | 0.212 | 0.232 | 0.231 | 0.158 | 0.227 |
2000 | 0.519 | 0.278 | 0.135 | 0.167 | 0.178 | 0.174 | 0.244 |
2001 | 0.416 | 0.447 | 0.235 | 0.112 | 0.139 | 0.149 | 0.264 |
2002 | 0.457 | 0.357 | 0.378 | 0.191 | 0.093 | 0.110 | 0.248 |
2003 | 0.387 | 0.393 | 0.309 | 0.303 | 0.148 | 0.076 | 0.215 |
2004 | 0.436 | 0.332 | 0.325 | 0.239 | 0.233 | 0.107 | 0.181 |
2005 | 0.745 | 0.373 | 0.257 | 0.235 | 0.174 | 0.167 | 0.169 |
2006 | 0.843 | 0.651 | 0.299 | 0.205 | 0.181 | 0.132 | 0.185 |
2007 | 0.777 | 0.724 | 0.546 | 0.250 | 0.178 | 0.146 | 0.226 |
2008 | 0.834 | 0.664 | 0.622 | 0.455 | 0.210 | 0.149 | 0.268 |
2009 | 1.285 | 0.711 | 0.560 | 0.536 | 0.385 | 0.156 | 0.282 |
2010 | 1.730 | 1.100 | 0.608 | 0.493 | 0.456 | 0.303 | 0.338 |
Table 3.7.9
Shetland: Estimates of fishing mortality by age and year from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | |
---|---|---|---|---|---|---|---|
1986 | 0.005 | 0.023 | 0.066 | 0.128 | 0.171 | 0.159 | 0.160 |
1987 | 0.022 | 0.066 | 0.068 | 0.091 | 0.131 | 0.112 | 0.113 |
1988 | 0.040 | 0.072 | 0.086 | 0.099 | 0.096 | 0.100 | 0.127 |
1989 | 0.037 | 0.087 | 0.109 | 0.136 | 0.298 | 0.291 | 0.260 |
1990 | 0.062 | 0.075 | 0.104 | 0.142 | 0.201 | 0.207 | 0.205 |
1991 | 0.022 | 0.067 | 0.120 | 0.141 | 0.201 | 0.216 | 0.222 |
1992 | 0.087 | 0.170 | 0.148 | 0.191 | 0.187 | 0.195 | 0.222 |
1993 | 0.023 | 0.114 | 0.446 | 0.208 | 0.178 | 0.179 | 0.182 |
1994 | 0.017 | 0.073 | 0.240 | 0.205 | 0.161 | 0.162 | 0.155 |
1995 | 0.013 | 0.080 | 0.221 | 0.285 | 0.172 | 0.162 | 0.154 |
1996 | 0.006 | 0.059 | 0.183 | 0.220 | 0.229 | 0.221 | 0.221 |
1997 | 0.013 | 0.234 | 0.252 | 0.273 | 0.263 | 0.242 | 0.236 |
1998 | 0.009 | 0.145 | 0.184 | 0.263 | 0.417 | 0.494 | 0.529 |
1999 | 0.008 | 0.095 | 0.171 | 0.312 | 0.381 | 0.417 | 0.402 |
2000 | 0.009 | 0.068 | 0.102 | 0.175 | 0.212 | 0.235 | 0.221 |
2001 | 0.005 | 0.103 | 0.167 | 0.158 | 0.219 | 0.276 | 0.258 |
2002 | 0.003 | 0.044 | 0.207 | 0.293 | 0.296 | 0.328 | 0.288 |
2003 | 0.009 | 0.108 | 0.213 | 0.291 | 0.370 | 0.439 | 0.400 |
2004 | 0.039 | 0.153 | 0.303 | 0.371 | 0.345 | 0.359 | 0.336 |
2005 | 0.055 | 0.142 | 0.192 | 0.291 | 0.286 | 0.254 | 0.258 |
2006 | 0.038 | 0.147 | 0.186 | 0.229 | 0.314 | 0.334 | 0.355 |
2007 | 0.023 | 0.124 | 0.232 | 0.225 | 0.247 | 0.273 | 0.234 |
2008 | 0.018 | 0.101 | 0.275 | 0.267 | 0.447 | 0.577 | 0.461 |
2009 | 0.021 | 0.105 | 0.219 | 0.343 | 0.443 | 0.584 | 0.582 |
2010 | 0.022 | 0.164 | 0.418 | 0.519 | 0.571 | 0.626 | 0.608 |
Table 3.7.10
Shetland: Standard errors of estimates of log fishing mortality by age and year from the final TSA run.
3 | 4 | 5 | 6 | 7 | 8 | 9 | |
---|---|---|---|---|---|---|---|
1986 | 0.151 | 0.146 | 0.140 | 0.158 | 0.169 | 0.192 | 0.170 |
1987 | 0.151 | 0.147 | 0.145 | 0.146 | 0.164 | 0.200 | 0.188 |
1988 | 0.145 | 0.141 | 0.158 | 0.177 | 0.150 | 0.165 | 0.152 |
1989 | 0.137 | 0.139 | 0.148 | 0.165 | 0.154 | 0.171 | 0.142 |
1990 | 0.137 | 0.138 | 0.141 | 0.150 | 0.152 | 0.172 | 0.160 |
1991 | 0.137 | 0.135 | 0.144 | 0.147 | 0.137 | 0.153 | 0.140 |
1992 | 0.133 | 0.126 | 0.133 | 0.143 | 0.132 | 0.145 | 0.127 |
1993 | 0.141 | 0.133 | 0.117 | 0.147 | 0.140 | 0.152 | 0.120 |
1994 | 0.140 | 0.139 | 0.126 | 0.136 | 0.137 | 0.153 | 0.117 |
1995 | 0.141 | 0.142 | 0.121 | 0.119 | 0.122 | 0.140 | 0.116 |
1996 | 0.135 | 0.137 | 0.135 | 0.130 | 0.118 | 0.143 | 0.127 |
1997 | 0.130 | 0.118 | 0.122 | 0.129 | 0.119 | 0.138 | 0.151 |
1998 | 0.127 | 0.133 | 0.138 | 0.137 | 0.118 | 0.140 | 0.133 |
1999 | 0.131 | 0.133 | 0.135 | 0.133 | 0.130 | 0.150 | 0.139 |
2000 | 0.139 | 0.137 | 0.144 | 0.152 | 0.142 | 0.148 | 0.140 |
2001 | 0.135 | 0.130 | 0.132 | 0.145 | 0.131 | 0.137 | 0.123 |
2002 | 0.137 | 0.144 | 0.127 | 0.130 | 0.132 | 0.146 | 0.122 |
2003 | 0.133 | 0.129 | 0.126 | 0.131 | 0.124 | 0.145 | 0.122 |
2004 | 0.134 | 0.128 | 0.121 | 0.122 | 0.124 | 0.150 | 0.135 |
2005 | 0.154 | 0.136 | 0.143 | 0.141 | 0.134 | 0.145 | 0.145 |
2006 | 0.164 | 0.142 | 0.148 | 0.156 | 0.142 | 0.157 | 0.151 |
2007 | 0.161 | 0.164 | 0.147 | 0.154 | 0.152 | 0.164 | 0.155 |
2008 | 0.165 | 0.182 | 0.168 | 0.159 | 0.139 | 0.156 | 0.146 |
2009 | 0.204 | 0.219 | 0.214 | 0.187 | 0.180 | 0.202 | 0.192 |
2010 | 0.259 | 0.252 | 0.260 | 0.248 | 0.241 | 0.256 | 0.254 |
Table 3.7.11
Shetland: Stock summary from the final TSA run (in thousands).
Catch (t) | Catch estimate (t) | SSB (t) | Recruitment (1000s) | Mean F(4-6) | |
---|---|---|---|---|---|
1986 | 51 | 46 | 582 | 5834 | 0.072 |
1987 | 44 | 48 | 642 | 4750 | 0.075 |
1988 | 50 | 50 | 605 | 3117 | 0.085 |
1989 | 74 | 83 | 521 | 2609 | 0.111 |
1990 | 61 | 59 | 445 | 3419 | 0.107 |
1991 | 59 | 54 | 477 | 7435 | 0.109 |
1992 | 72 | 82 | 649 | 14898 | 0.170 |
1993 | 79 | 88 | 715 | 12457 | 0.256 |
1994 | 88 | 81 | 764 | 11063 | 0.173 |
1995 | 105 | 98 | 797 | 10354 | 0.195 |
1996 | 93 | 95 | 777 | 8225 | 0.154 |
1997 | 128 | 131 | 711 | 4871 | 0.253 |
1998 | 128 | 132 | 575 | 3507 | 0.197 |
1999 | 104 | 102 | 513 | 5453 | 0.193 |
2000 | 46 | 54 | 560 | 9391 | 0.115 |
2001 | 69 | 69 | 589 | 7822 | 0.142 |
2002 | 79 | 80 | 618 | 8342 | 0.181 |
2003 | 106 | 111 | 662 | 6947 | 0.204 |
2004 | 123 | 128 | 646 | 6967 | 0.275 |
2005 | 99 | 99 | 662 | 9389 | 0.208 |
2006 | 107 | 105 | 700 | 9448 | 0.187 |
2007 | 99 | 101 | 699 | 7096 | 0.193 |
2008 | 122 | 131 | 664 | 6239 | 0.214 |
2009 | 126 | 133 | 652 | 6639 | 0.222 |
2010 | 149 | 156 | 622 | 7206 | 0.367 |
Table 3.8.1
East Coast: Quarterly dredge landings ( UK vessels into Scotland) and market sample details, 1985-2010.
Landings (tonnes) | Numbers Aged and Measured/Boats Sampled | ||||||||
---|---|---|---|---|---|---|---|---|---|
Qtr1 | Qtr2 | Qtr3 | Qtr4 | Total | Qtr1 | Qtr2 | Qtr3 | Qtr4 | |
1985 | 0 | 0 | 0 | 0 | 0 | ||||
1986 | 0 | 0 | 0 | 0 | 0 | ||||
1987 | 0 | 0 | 0 | 0 | 0 | ||||
1988 | 0 | 0 | 0 | 0 | 0 | ||||
1989 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 |
1990 | 0 | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
1991 | 0 | 90 | 445 | 5 | 540 | 0 | 594/4 | 1433/8 | 0 |
1992 | 68 | 151 | 100 | 2 | 321 | 550/4 | 226/1 | 0 | 169/1 |
1993 | 25 | 118 | 476 | 8 | 626 | 459/2 | 288/1 | 2336/10 | 245/1 |
1994 | 80 | 1142 | 513 | 78 | 1813 | 227/1 | 6954/26 | 1808/6 | 866/3 |
1995 | 351 | 850 | 561 | 139 | 1902 | 3821/15 | 6380/26 | 5851/24 | 1249/5 |
1996 | 238 | 345 | 43 | 53 | 679 | 1126/5 | 3335/16 | 760/3 | 698/3 |
1997 | 131 | 457 | 74 | 53 | 715 | 832/4 | 2626/11 | 176/1 | 415/2 |
1998 | 276 | 608 | 75 | 47 | 1006 | 320/3 | 850/5 | 383/2 | 206/1 |
1999 | 379 | 857 | 276 | 307 | 1819 | 116/1 | 1326/7 | 0 | 1497/10 |
2000 | 222 | 341 | 112 | 51 | 726 | 106/1 | 688/5 | 0 | 352/2 |
2001 | 61 | 201 | 24 | 11 | 299 | 0 | 0 | 0 | 0 |
2002 | 80 | 220 | 83 | 32 | 416 | 0 | 340/2 | 0 | 0 |
2003 | 89 | 227 | 293 | 209 | 818 | 0 | 145/1 | 570/2 | 0 |
2004 | 660 | 1134 | 261 | 384 | 2439 | 681/3 | 1356/7 | 0 | 258/1 |
2005 | 336 | 456 | 513 | 266 | 1571 | 219/1 | 543/3 | 277/1 | 0 |
2006 | 314 | 966 | 291 | 199 | 1769 | 149/1 | 479/2 | 469/2 | 0 |
2007 | 405 | 1061 | 954 | 174 | 2593 | 788/3 | 1498/6 | 1305/6 | 669/3 |
2008 | 272 | 618 | 697 | 256 | 1843 | 1285/5 | 936/4 | 1303/6 | 455/2 |
2009 | 200 | 554 | 623 | 151 | 1528 | 0 | 1929/7 | 168/1 | 1003/4 |
2010 | 188 | 920 | 569 | 80 | 1757 | 515/2 | 562/3 | 0 | 210/1 |
Table 3.8.2
East Coast: Total catch-at-age numbers (in thousands).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1991 | 109 | 191 | 198 | 234 | 165 | 262 | 208 | 188 | 862 |
1992 | 1 | 13 | 282 | 232 | 250 | 220 | 157 | 109 | 496 |
1993 | 27 | 337 | 1711 | 826 | 255 | 172 | 90 | 75 | 189 |
1994 | 0 | 361 | 3528 | 4365 | 1343 | 376 | 205 | 146 | 553 |
1995 | 7 | 246 | 1788 | 3144 | 3280 | 1137 | 541 | 218 | 589 |
1996 | 2 | 52 | 357 | 755 | 1181 | 844 | 197 | 46 | 155 |
1997 | 5 | 69 | 520 | 732 | 1022 | 938 | 353 | 66 | 94 |
1998 | 0 | 20 | 103 | 486 | 809 | 1295 | 939 | 352 | 270 |
1999 | 0 | 204 | 367 | 518 | 781 | 1225 | 1546 | 1641 | 2547 |
2000 | 0 | 15 | 343 | 108 | 101 | 290 | 597 | 667 | 1177 |
2001 | 0 | 0 | 5 | 9 | 9 | 36 | 68 | 74 | 98 |
2002 | 0 | 559 | 547 | 84 | 32 | 65 | 176 | 202 | 238 |
2003 | 0 | 304 | 2475 | 918 | 123 | 201 | 178 | 195 | 359 |
2004 | 0 | 18 | 1344 | 4175 | 2986 | 1077 | 662 | 543 | 2013 |
2005 | 0 | 298 | 786 | 2169 | 2793 | 844 | 253 | 193 | 805 |
2006 | 0 | 190 | 537 | 1474 | 2577 | 2392 | 1513 | 509 | 777 |
2007 | 0 | 916 | 6912 | 3116 | 1724 | 1066 | 540 | 236 | 686 |
2008 | 43 | 812 | 2590 | 3060 | 1246 | 889 | 583 | 299 | 519 |
2009 | 10 | 284 | 1293 | 2016 | 1449 | 1174 | 852 | 451 | 832 |
2010 | 0 | 7 | 436 | 1770 | 4335 | 1538 | 886 | 449 | 355 |
Table 3.8.3
East Coast: Mean weights-at-age (muscle) (kg) in total catch (also used for stock weights).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1991 | 0.015 | 0.019 | 0.020 | 0.023 | 0.025 | 0.027 | 0.029 | 0.030 | 0.034 |
1992 | 0.013 | 0.015 | 0.015 | 0.020 | 0.022 | 0.023 | 0.024 | 0.027 | 0.027 |
1993 | 0.013 | 0.015 | 0.017 | 0.021 | 0.025 | 0.029 | 0.031 | 0.032 | 0.036 |
1994 | 0.014 | 0.015 | 0.017 | 0.019 | 0.023 | 0.027 | 0.028 | 0.030 | 0.033 |
1995 | 0.015 | 0.016 | 0.018 | 0.019 | 0.020 | 0.023 | 0.026 | 0.027 | 0.030 |
1996 | 0.014 | 0.015 | 0.017 | 0.020 | 0.022 | 0.025 | 0.029 | 0.033 | 0.033 |
1997 | 0.014 | 0.015 | 0.018 | 0.020 | 0.022 | 0.025 | 0.028 | 0.030 | 0.036 |
1998 | 0.014 | 0.017 | 0.019 | 0.023 | 0.026 | 0.028 | 0.031 | 0.034 | 0.036 |
1999 | 0.014 | 0.018 | 0.020 | 0.021 | 0.022 | 0.023 | 0.025 | 0.026 | 0.027 |
2000 | 0.014 | 0.016 | 0.020 | 0.021 | 0.024 | 0.023 | 0.025 | 0.027 | 0.031 |
2001 | 0.014 | 0.017 | 0.015 | 0.019 | 0.020 | 0.022 | 0.024 | 0.026 | 0.028 |
2002 | 0.014 | 0.016 | 0.019 | 0.027 | 0.027 | 0.030 | 0.032 | 0.033 | 0.037 |
2003 | 0.014 | 0.015 | 0.018 | 0.020 | 0.024 | 0.026 | 0.028 | 0.030 | 0.031 |
2004 | 0.014 | 0.013 | 0.016 | 0.019 | 0.021 | 0.024 | 0.028 | 0.030 | 0.032 |
2005 | 0.014 | 0.012 | 0.015 | 0.019 | 0.023 | 0.026 | 0.028 | 0.030 | 0.036 |
2006 | 0.014 | 0.015 | 0.016 | 0.017 | 0.020 | 0.022 | 0.024 | 0.026 | 0.029 |
2007 | 0.014 | 0.015 | 0.017 | 0.021 | 0.025 | 0.029 | 0.032 | 0.032 | 0.038 |
2008 | 0.015 | 0.018 | 0.019 | 0.021 | 0.024 | 0.027 | 0.028 | 0.031 | 0.036 |
2009 | 0.015 | 0.016 | 0.017 | 0.019 | 0.022 | 0.025 | 0.027 | 0.031 | 0.035 |
2010 | 0.015 | 0.015 | 0.017 | 0.019 | 0.021 | 0.022 | 0.024 | 0.025 | 0.031 |
Table 3.8.4
East Coast: Available research-vessel survey data by age and year (numbers hour -1metre -1).
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10+ | |
---|---|---|---|---|---|---|---|---|---|
1994 | 0.01 | 0.24 | 4.68 | 13.36 | 4.32 | 1.36 | 0.93 | 0.61 | 2.28 |
1995 | 0.01 | 0.80 | 1.10 | 4.39 | 6.01 | 1.18 | 0.51 | 0.18 | 0.72 |
1996 | 0.00 | 0.08 | 2.65 | 1.21 | 4.51 | 4.53 | 1.01 | 0.33 | 0.76 |
1997 | NA | NA | NA | NA | NA | NA | NA | NA | NA |
1998 | 0.00 | 0.38 | 0.27 | 0.49 | 0.43 | 2.64 | 2.33 | 4.26 | 4.32 |
1999 | 0.10 | 0.62 | 0.38 | 0.32 | 0.33 | 2.46 | 2.18 | 2.48 | 2.08 |
2000 | 0.60 | 0.96 | 0.79 | 0.22 | 0.44 | 0.84 | 2.55 | 3.04 | 3.63 |
2001 | 0.03 | 3.16 | 1.21 | 0.65 | 0.35 | 0.67 | 1.71 | 2.41 | 2.94 |
2002 | 0.02 | 3.85 | 6.16 | 1.16 | 0.79 | 0.50 | 1.28 | 2.05 | 2.50 |
2003 | 0.00 | 1.27 | 5.23 | 4.37 | 1.58 | 0.79 | 0.96 | 0.79 | 3.58 |
2004 | 0.20 | 1.42 | 2.74 | 4.98 | 3.80 | 0.78 | 0.59 | 1.00 | 3.13 |
2005 | 0.11 | 2.53 | 2.20 | 3.14 | 4.55 | 3.32 | 0.84 | 0.58 | 3.51 |
2006 | 0.00 | 5.88 | 3.84 | 3.19 | 3.13 | 3.35 | 2.49 | 1.88 | 2.72 |
2007 | 0.02 | 0.68 | 3.80 | 4.84 | 2.89 | 2.66 | 2.10 | 2.01 | 3.38 |
2008 | 0.00 | 1.07 | 4.52 | 8.40 | 3.50 | 2.23 | 1.60 | 0.62 | 3.68 |
2009 | 0.00 | 0.62 | 2.42 | 4.13 | 5.43 | 3.27 | 2.02 | 0.88 | 4.77 |
2010 | 0.00 | 0.78 | 2.05 | 2.95 | 3.94 | 4.08 | 2.28 | 0.83 | 4.08 |
Table 3.9.1
Orkney: Quarterly dredge landings ( UK vessels into Scotland) and market sample details 1985-2010.
Landings (tonnes) | Numbers Aged and Measured/Boats Sampled | ||||||||
---|---|---|---|---|---|---|---|---|---|
Qtr1 | Qtr2 | Qtr3 | Qtr4 | Total | Qtr1 | Qtr2 | Qtr3 | Qtr4 | |
1985 | 3 | 0 | 1 | 0 | 4 | 0 | 0 | 0 | 0 |
1986 | 4 | 88 | 9 | 7 | 109 | 0 | 0 | 0 | 0 |
1987 | 9 | 21 | 13 | 78 | 120 | 0 | 0 | 0 | 0 |
1988 | 4 | 26 | 5 | 0 | 35 | 0 | 0 | 0 | 0 |
1989 | 7 | 43 | 235 | 8 | 293 | 0 | 0 | 441/2 | 0 |
1990 | 1 | 157 | 12 | 6 | 176 | 0 | 249/1 | 0 | 0 |
1991 | 29 | 86 | 9 | 0 | 124 | 0 | 389/2 | 502/2 | 0 |
1992 | 0 | 0 | 0 | 26 | 26 | 0 | 0 | 0 | 0 |
1993 | 0 | 0 | 0 | 0 | 0 | 0 | 730/3 | 0 | 0 |
1994 | 28 | 34 | 42 | 6 | 110 | 0 | 0 | 487/2 | 338/2 |
1995 | 33 | 72 | 37 | 72 | 214 | 0 | 659/5 | 188/1 | 332/1 |
1996 | 61 | 81 | 31 | 41 | 214 | 454/4 | 559/2 | 0 | 293/2 |
1997 | 25 | 47 | 41 | 33 | 146 | 0 | 0 | 1613/2 | 172/1 |
1998 | 48 | 52 | 25 | 39 | 163 | 0 | 500/3 | 130/1 | 275/2 |
1999 | 42 | 152 | 55 | 42 | 291 | 432/2 | 1046/4 | 166/1 | 0 |
2000 | 30 | 23 | 24 | 22 | 99 | 0 | 0 | 361/2 | 451/2 |
2001 | 49 | 54 | 265 | 74 | 442 | 174/1 | 0 | 1087/5 | 303/2 |
2002 | 15 | 119 | 33 | 101 | 268 | 0 | 172/1 | 171/1 | 321/2 |
2003 | 78 | 74 | 15 | 8 | 175 | 0 | 175/1 | 0 | 174/1 |
2004 | 29 | 55 | 26 | 39 | 148 | 0 | 681/3 | 0 | 0 |
2005 | 65 | 82 | 22 | 51 | 220 | 0 | 0 | 0 | 0 |
2006 | 50 | 19 | 42 | 6 | 117 | 0 | 0 | 0 | 0 |
2007 | 29 | 37 | 12 | 26 | 104 | 239/1 | 351/2 | 0 | 0 |
2008 | 34 | 74 | 61 | 14 | 184 | 0 | 709/4 | 81/1 | 278/1 |
2009 | 25 | 105 | 12 | 50 | 192 | 0 | 491/4 | 0 | 599/4 |
2010 | 30 | 59 | 37 | 49 | 176 | 331/2 | 414/3 | 499/4 | 0 |
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