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Extreme genetic differentiation among the remnant populations of marble trout ( Salmo marmoratus ) in Slovenia
Author(s) -
Fumagalli L.,
Snoj A.,
Jesenšek D.,
Balloux F.,
Jug T.,
Duron O.,
Brossier F.,
Crivelli A. J.,
Berrebi P.
Publication year - 2002
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1046/j.1365-294x.2002.01648.x
Subject(s) - salmo , biology , brown trout , introgression , genetic diversity , trout , genetic variability , microsatellite , genetic structure , zoology , conservation genetics , genetic variation , evolutionary biology , population , fishery , fish <actinopterygii> , genetics , genotype , allele , gene , demography , sociology
Populations of the marble trout ( Salmo marmoratus ) have declined critically due to introgression by brown trout ( Salmo trutta ) strains. In order to define strategies for long‐term conservation, we examined the genetic structure of the 8 known pure populations using 15 microsatellite loci. The analyses reveal extraordinarily strong genetic differentiation among populations separated by < 15 km, and extremely low levels of intrapopulation genetic variability. As natural recolonization seems highly unlikely, appropriate management and conservation strategies should comprise the reintroduction of pure populations from mixed stocks (translocation) to avoid further loss of genetic diversity.