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Failure of a stocking policy, of hatchery reared brown trout, Salmo trutta L., in Asturias, Spain, detected using LDH‐5 * as a genetic marker
Author(s) -
Morán P.,
Pendás A. M.,
GarciaVázquez E.,
Izquierdo J.
Publication year - 1991
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1991.tb05075.x
Subject(s) - biology , hatchery , stocking , salmo , brown trout , allele , fishery , fixation (population genetics) , fish hatchery , reproduction , trout , zoology , aquaculture , ecology , fish farming , fish <actinopterygii> , genetics , gene
A useful genetic marker exists through the apparent fixation of the LDH‐5 * 100 allele in wild populations of brown trout in rivers from Asturias, Spain, contrasted with the near fixation of the LDH‐5 * 90 allele in hatchery populations used to stock these rivers. In sampling locations where natural reproduction occurred, the * 100 allele was found exclusively in all areas having no record of hatchery stocking. The * 100 allele also predominated in three stocked areas having natural reproduction; in two of these areas a few individuals of the 0 + age class were homozygous for the * 90 allele. These data indicated that all catchable and reproductive fish originated from indigenous populations and thus the policy of hatchery supplementation was a failure in these areas.