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- Publisher
- Wiley
- Copyright
- Copyright © 1984 Wiley Subscription Services, Inc., A Wiley Company
- ISSN
- 0022-1112
- eISSN
- 1095-8649
- DOI
- 10.1111/j.1095-8649.1984.tb04805.x
- Publisher site
- See Article on Publisher Site
Abstract
Enzyme gene variability in a lake‐dwelling brown trout, Salmo Irulla, population was compared with its hatchery derivative by starch gel electrophoresis. A loss of genetic variability was detected in the hatchery stock founded 16 years ago in comparison to the present day wild stock; of seven originally polymorphic loci (Aat‐4, Ck‐l, Gpi‐3, G3p‐2, Ldh‐1, Mclh‐2 and Pgm‐l) two, Gpi‐3 and Ldh‐1, had become monomorphic. The overall hetero‐zygosity was reduced by a third from 6–2% to 4–2%. A comparison between three successive hatchery cohorts indicates a distinction between stock heterogeneity. The decrease in genetic variability is probably attributable to small population size in the founding event with subsequent genetic drift and inadvertent selection during hatchery procedures.
Journal
Journal of Fish Biology – Wiley
Published: Mar 1, 1984