Scottish fish farm production survey 2018

Appendix 2

Glossary and Abbreviations

Active Fish farms in a production growing cycle which may contain stock or be fallow.

Alevin Young fish, at stage from hatching to end of dependence on yolk sacs as primary source of nutrition.

Broodstock Adult fish held until maturation for breeding purposes.

Diploid Fish with the normal two sets of chromosomes.

EEA European Economic Area.

EFTA European Free Trade Association.

ERM Enteric redmouth disease.

EU European Union.

Eyed-ova/eggs Fish egg(s) at the stage of development when the heavily pigmented eyes of the embryo are sufficiently developed to be clearly visible.

Fallow Fish farm having no stock, but still part of a growing cycle.

Fingerling A term commonly applied to young stages of salmonid fish.

Fry The life stage of a young salmon from independence of the yolk sac as the primary source of nutrition to dispersal from the redd.

Gamete Reproductive cells.

Grilse Salmon harvested between 1^st January and 31^st August after one winter at sea.

Intra-peritoneal Within the body cavity.

IPN Infectious pancreatic necrosis.

Non-producing A site which is active, may be stocked with fish, but has not produced any fish for harvest during the specified year.

On-growing Farm producing fish for the table market.

Ova Eggs.

0-year fish Fish in their first year of life.

MSS Marine Scotland Science.

Parr Young salmon at stage from dispersal from redd to migration as a smolt.

Photoperiod Alteration of the daylight regime.

Pre-salmon Salmon harvested between 1^st September and 31^st December after one winter at sea.

Raceway Concrete or brick channels used for farming fish.

SAV Salmonid alphavirus.

S½ Salmon or sea trout smolting at approximately six months from hatch (usually by photoperiod and/or temperature manipulation).

S1 Salmon or sea trout smolting at approximately one year from hatch.

S1½ Salmon or sea trout smolting at approximately 18 months from hatch.

S2 Salmon or sea trout smolting at approximately two years from hatch.

Smolt Fully silvered juvenile salmon or sea trout ready to be transferred or to migrate to sea.

Third Country Country outside the EU except Norway and Iceland.

Triploid Triploid fish are sterile fish which have three sets of chromosomes, unlike fertile fish that have two sets of chromosomes (diploid).

Year class Fish hatched or put to sea in a given year.