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Genetic structure of brown trout, Salmo trutta , populations from differently sized tributaries of Lake Mjøsa in south‐east Norway
Author(s) -
Linløkken A. N.,
Johansen W.,
Wilson R.
Publication year - 2014
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1111/fme.12101
Subject(s) - salmo , brown trout , tributary , genetic diversity , trout , streams , biology , genetic distance , microsatellite , population , ecology , genetic structure , fishery , zoology , geography , allele , demography , fish <actinopterygii> , cartography , genetics , computer network , sociology , computer science , gene
This study was based on genotyping eight microsatellite loci of 463 brown trout, Salmo trutta L., sampled in nine differently sized tributaries in three areas on the eastern shore of Lake Mjøsa, south‐eastern Norway. The populations were genetically structured, and Mantel's test showed that genetic distance correlated positively with geographical distance. Temporal differentiation F ST over a 2‐year period was estimated in five streams and was non‐significant after Bonferroni correction. Effective population size N e was positively correlated with the habitat length available from the lake (0.3–22 km) and negatively with the number of full sib pairs in the sample. There was no correlation between N e and genetic diversity, and private alleles were recorded in three medium‐sized streams, but not in the largest two. The importance of small spawning and nursery streams for the maintenance of genetic diversity of brown trout was demonstrated.