|Genetic techniques for the commercial control of sexual maturation in rainbow trout (Salmo gairdneri R.)|
Lincoln, R.F.; Bye, V.J. (1989). Genetic techniques for the commercial control of sexual maturation in rainbow trout (Salmo gairdneri R.), in: De Pauw, N. et al. (Ed.) Aquaculture: a biotechnology in progress: volume 1. pp. 551-559
In: De Pauw, N. et al. (Ed.) (1989). Aquaculture: a biotechnology in progress: volume 1. European Aquaculture Society: Bredene, Belgium. ISBN 90-71625-03-6. 1-592 pp., more
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The production of large fish for the processing industry and for supplying sport fisheries forms a significant and increasing proportion of the total output of UK trout farms. This has been facilitated in recent years by the development, at the Fisheries Laboratory Lowestoft, of commercial methods for the production of all-female and sterile stocks of rainbow trout which minimize the losses and deterioration in the quality of fish associated with sexual maturity. All-female stocks of trout are produced by crossing normal females with phenotypic males of female genotype obtained by feeding fry for 700°C/days (70 days at 10°C) with 17 α-methyltestosterone in the food at the rate of 3mg.kg-1. Sterile triploid fish are produced by heat-shocking female eggs at 28°C for 10min, 30min after fertilization. Both techniques have become firmly established in the UK industry over the past 8 years. This paper describes their laboratory development and the modifications to the procedures required for their industrial uptake.