National Electrofishing Programme for Scotland (NEPS) 2021: analysis
The National Electrofishing Programme for Scotland (NEPS) is a statistical survey design that ensures collection of unbiased data on the density and status of salmon and the pressures that affect them, including water quality and genetic introgression. This report presents the latest analysis.
References
Bacon PJ, Malcolm IA, Fryer RJ, Glover, RS Millar CP and Youngson AF. 2015. Can Conservation Stocking Enhance Juvenile Emigrant Production in Wild Atlantic Salmon?. Transactions of the American Fisheries Society, 144: 642-654. https://doi.org/10.1080/00028487.2015.1017655
Bates D, Mächler M, Bolker B, Walker S. 2015. Fitting Linear Mixed-Effects Models Using lme4. Journal of Statistical Software, 67(1), 1–48. doi: 10.18637/jss.v067.i01.
Chaput G. 2012. Overview of the status of Atlantic salmon (Salmo salar) in the North Atlantic and trends in marine mortality. ICES Journal of Marine Science 69 (9): 1538–1548 DOI: 10.1093/icesjms/fss013
Charlton MB, Bowes MJ, Hutchins MG, Orr HG, Soley R and Davison P. 2018. Mapping eutrophication risk from climate change: Future phosphorus concentrations in English rivers, Science of The Total Environment, Volumes 613–614, 1510-1526, ISSN 0048-969 https://doi.org/10.1016/j.scitotenv.2017.07.218.
Dauphin G J R. Chaput G, Breau C and Cunjak RA. 2018. Hierarchical model detects decadal changes in calibration relationships of single-pass electrofishing indices of abundance of Atlantic salmon in two large Canadian catchments. Canadian Journal of Fisheries and Aquatic Sciences. https://doi.org/10.1139/cjfas-2017-0456
Dupas R, Minaudo C and Abbott BW. 2019. Stability of spatial patterns in water chemistry across temperate ecoregions. Environmental Research Letters, Volume 14, Number 7 https://doi.org/10.1088/1748-9326/ab24f4
Edwards AC and Withers PJA. 2008. Transport and delivery of suspended solids, nitrogen and phosphorus from various sources to freshwaters in the UK. Journal of Hydrology, Volume 350, Issues 3–4,144-153, ISSN 0022-1694, https://doi.org/10.1016/j.jhydrol.2007.10.053.
Forseth T, Barlaup B T, Finstad B, Fiske P, Gjøsæter H, Falkegård M, Hindar A, Mo T A, Rikardsen A H, Thorstad E B, Vøllestad L A, Wennevik V. 2017. The major threats to Atlantic salmon in Norway. ICES Journal of Marine Science, Volume 74, Issue 6, July-August 2017, Pages 1496–1513, https://doi.org/10.1093/icesjms/fsx020
Gilbey J, Sampayo J, Cauwelier E, Malcolm IA, Millidine K, Jackson FL, & Morris DJ. 2021. A national assessment of the influence of farmed salmon escapes on the genetic integrity of wild Scottish Atlantic salmon populations. Scottish Marine and Freshwater Science Vol 12 No 12, 70pp. DOI: 10.7489/12386-1
Glover RS, Fryer RJ, Soulsby C, Bacon PJ, Malcolm IA. 2018. Incorporating estimates of capture probability and river network covariance in novel habitat - abundance models: assessing the effects of conservation stocking on catchment-scale production of juvenile Atlantic salmon (Salmo salar) from a long-term electrofishing dataset. Ecological Indicators 93 (February): 302–315 DOI: 10.1016/j.ecolind.2018.05.013
Glover, RS, Fryer, RJ, Soulsby, C, Malcolm, IA. 2019. These are not the trends you are looking for: poorly calibrated single‐pass electrofishing data can bias estimates of trends in fish abundance. Journal of Fish Biology. 95: 1223– 1235. https://doi.org/10.1111/jfb.14119
Glover, RS, Soulsby, C, Fryer, RJ, Birkel, C, Malcolm, IA. (2020) Quantifying the relative importance of stock level, river temperature and discharge on the abundance of juvenile Atlantic salmon (Salmo salar). Ecohydrology. e2231. https://doi.org/10.1002/eco.2231
Gurney WS, Bacon PJ, McKenzie E, McGinnity P, Mclean J, Smith G, Youngson A. Form and uncertainty in stock–recruitment relations: observations and implications for Atlantic salmon (Salmo salar) management. Canadian Journal of Fisheries and Aquatic Sciences. 2010 Jun;67(6):1040-55. https://doi.org/10.1139/F10-038
Gurney WSC, Bacon PJ, Malcolm IA, MacLean JC, Youngson A. 2015. The demography of a phenotypically mixed Atlantic salmon (Salmo salar) population as discerned for an eastern Scottish river DOI: 10.7489/1662-1
ICES. 2021. Working Group on North Atlantic Salmon ( WGNAS). ICES Scientific Reports. 3: 29. 407 pp. https://doi.org/10.17895/ices.pub.7923
JNCC (2015) Common Standards Monitoring Guidance for Freshwater Fauna ISSN 1743-8160 (online)
Jackson FL, Fryer RJ, Hannah DM, Malcolm IA. 2017. Can spatial statistical river temperature models be transferred between catchments? Hydrology and Earth System Sciences 21 (9): 4727–4745 DOI: 10.5194/hess-21-4727-2017
Jarvie HP, Smith DR, Norton LR, Edwards FK, Bowes MJ, King SM, Scarlett P, Davies S, Dils RM, Bachiller-Jareno N. 2018. Phosphorus and nitrogen limitation and impairment of headwater streams relative to rivers in Great Britain: A national perspective on eutrophication. Science of the Total Environment, 621, 849-862. doi: 10.1016/j.scitotenv.2017.11.128. Epub 2017 Dec 18. PMID: 29216593.
Kincaid T, Olsen T, Stevens D, Platt C, White D, Remington R. 2020. Package 'spsurvey' Spatial Survey Design and Analysis Available at: https://cran.r-project.org/web/packages/spsurvey/spsurvey.pdf
Malcolm IA, Bacon PJ, Middlemas SJ, Fryer RJ, Shilland EM, Collen P. 2014. Relationships between hydrochemistry and the presence of juvenile brown trout (Salmo trutta) in headwater streams recovering from acidification. Ecological Indicators 37 (PART B): 351–364 DOI: 10.1016/j.ecolind.2012.02.029
Malcolm IA, Millidine KJ, Glover RS, Jackson FL, Millar CP, Fryer RJ. 2019a. Development of a large-scale juvenile density model to inform the assessment and management of Atlantic salmon (Salmo salar) populations in Scotland. Ecological Indicators 96: 303–316 DOI: 10.1016/J.ECOLIND.2018.09.005
Malcolm IA, Millidine KJ, Jackson FL, Glover RS, Fryer RJ. 2019b Assessing the status of Atlantic salmon (Salmo salar) from juvenile electrofishing data collected under the National Electrofishing Programme for Scotland (NEPS) Scottish Marine and Freshwater Science Vol 10 No 2.
Malcolm I.A., Millidine K.J, Jackson F.L, Glover R.S Fryer R.J. 2020. The National Electrofishing Programme for Scotland (NEPS) 2019. Scottish Marine and Freshwater Science Vol 11 No 9, 56pp. DOI: 10.7489/12321-1
Marine Scotland. 2022. Salmon and Sea Trout fishery statistics: 1952 - 2021 season - reported catch by district and method. doi: 10.7489/12414-1
Millar CP, Fryer RJ, Millidine KJ, Malcolm IA. 2016. Modelling capture probability of Atlantic salmon (Salmo salar) from a diverse national electrofishing dataset: Implications for the estimation of abundance. Fisheries Research 177 DOI: 10.1016/j.fishres.2016.01.001
Monteith DT, Henrys PA, Evans CD, Malcolm I, Shilland EM, Pereira MG. 2015. Spatial controls on dissolved organic carbon in upland waters inferred from a simple statistical model. Biogeochemistry 123 (3) DOI: 10.1007/s10533-015-0071-x
PACEC. 2017. An Analysis of the Value of Wild Fisheries in Scotland. (March) Available at: http://www.gov.scot/Topics/marine/Salmon-Trout-Coarse/fishreform/sectorvalue
Rankinen K, Bernal J E C, Holmberg M, Vuorio K, Granlund K. 2019. Identifying multiple stressors that influence eutrophication in a Finnish agricultural river. Science of The Total Environment, Volume 658, 1278-1292, ISSN 0048-9697, https://doi.org/10.1016/j.scitotenv.2018.12.294.
Smart RP, Soulsby C, Cresser MS, Wadec a J, Townend J, Billett MF, Langand S. 2001. Riparian zone influence on stream water chemistry atdifferent spatial scales: a GIS-based modelling approach, an example for the Dee, NE Scotland. The Science of the Total Environment 280: 173–193 DOI: 10.1016/S0048-9697(01)00824-5
Thorley, J.L. Eatherley, D.M.R. Stephen, A.B. Simpson, I. MacLean, J.C. Youngson, A.F. 2005. Congruence between automatic fish counter data and rod catches of Atlantic salmon (Salmo salar) in Scottish rivers, ICES Journal of Marine Science, Volume 62, Issue 4, Pages 808–817, https://doi.org/10.1016/j.icesjms.2005.01.016
Williams KL, Griffiths SW, Nislow KH, McKelvey S, Armstrong JD. 2009. Response of juvenile Atlantic salmon, Salmo salar, to the introduction of salmon carcasses in upland streams. Fisheries Management and Ecology 16 (4): 290–297 DOI: 10.1111/j.1365-2400.2009.00673.x
Contact
Email: neps@gov.scot
There is a problem
Thanks for your feedback