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Genetic assessment of Atlantic salmon Salmo salar and sea trout Salmo trutta stocking in a Baltic Sea river
Author(s) -
Nilsson J.,
ÖStergren J.,
Lundqvist H.,
Carlsson U.
Publication year - 2008
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.1095-8649.2008.01992.x
Subject(s) - salmo , stocking , biology , brown trout , fishery , trout , salmonidae , fish <actinopterygii>
Microsatellite DNA variation was used to assess the outcome of stocking Atlantic salmon Salmo salar and migratory trout Salmo trutta in River Sävarå, N Sweden. No information on pre‐stocking genetic composition of S. salar and S. trutta in River Sävarå was available. In 2 year‐classes of S. salar smolt, microsatellite data indicated that post‐stocking genetic composition differed markedly ( F ST = 0·048) from the main donor strain, Byskeälven S. salar , and from other Gulf of Bothnia S. salar stocks ( F ST 0·047 and 0·132). The STRUCTURE programme failed to detect any substructuring within Sävarå salmon. It was concluded that only minor introgression estimated to a proportion of 0·11 (95% CI 0·07–0·16) has occurred in S. salar . Salmo trutta showed overall low differentiation among populations with maximum F ST of 0·03 making analysis more cumbersome than in S. salar . Still, the Sävarå S. trutta deviated significantly from potential donor populations, and STRUCTURE software supported that majority of trout in Sävarå formed a distinct genetic population. Admixture was more extensive in S. trutta and estimated to 0·17 (95% CI 0·10–0·25).