Premium
Loss of Genetic Variation in a Hatchery Stock of Cutthroat Trout
Author(s) -
Allendorf Fred W.,
Phelps Stevan R.
Publication year - 1980
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1980)109<537:logvia>2.0.co;2
Subject(s) - hatchery , biology , trout , salmo , genetic variation , loss of heterozygosity , locus (genetics) , fishery , allele , stock (firearms) , genetic variability , zoology , genetics , genotype , geography , gene , archaeology , fish <actinopterygii>
We have detected significant reduction in genetic variation at isozyme loci in a hatchery stock of west‐slope cutthroat trout (Salmo clarki) in comparison to the wild stock from which it was derived 14 years earlier. This conclusion is supported by (1) a 57% reduction in the proportion of polymorphic loci, (2) a 29% reduction in the average number of alleles per locus, (3) a 21% reduction in the average heterozygosity per individual, and (4) significant changes in allelic frequencies between age‐classes. This loss of variation is attributed to both a limited number of founders of the hatchery stock and the effects of genetic drift in the maintenance of the hatchery stock.