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Title: Sea trout gene banks : the feasibility of developing and utilising gene banks for sea trout (salmo trutta) conservation
Author: National Rivers Authority
Document Type: Monograph
The European trout, Salmo trutta L., provides valuable commercial and sports fisheries in England and Wales and sea trout, the anadromous form, is an important resource for tourist angling in the West of Ireland, Wales and in Scotland. An indication of the value of. sea trout stocks is given by Elliot (1989) based on commercial and rod catches of sea trout in England and Wales. By averaging total catches from all Water Authority (now National Rivers Authority) sectors, it was estimated that 110,547 fish were caught per year from 1983 to 1986, with an approximate value of 55 million. This report on preservation and rehabilation of sea trout (Salmo trutta) stocks was commissioned by the National Rivers Authority, because of their concern about the decline of sea trout in parts of Britain and Ireland. Methods of preservation are reviewed and it is concluded that only two are presently feasible for sea trout, viz. cryopreservation of milt and the use of living gene banks (specialised rearing stations), where both sexes can be maintained. Both of these techniques should be used together, since cryopreservation in fishes is currently feasible only with male gametes. The backgrounds and details of these techniques are described, as are the costs involved with each. Established gene banks for Atlantic salmon and other fish species are described.
Publisher: National Rivers Authority
Publication Date: 1992
Publication Place: Bristol
Subject Keywords: Fishery managementFishesStock assessmentGenetic resourcesConservation strategy
Taxonomic Keywords: Salmo trutta
Extent: 34; + appendices
Total file downloads: 258

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