Genetic diversity within sea trout population from an intensively stocked southern Baltic river,based on microsatellite DNA analysis |
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| Authors: | R. Bernaś A. Burzyński P. Dębowski A. Poćwierz‐Kotus R. Wenne |
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| Affiliation: | 1. Department of Migratory Fishes in Gdańsk, Inland Fisheries Institute in Olsztyn, , Gdańsk, Poland;2. Genetics and Marine Biotechnology Department, Institute of Oceanology Polish Academy of Science in Sopot, , Sopot, Poland |
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| Abstract: | Sea trout, Salmo trutta L., populations in the Slupia River basin have been affected by mass stocking with smolts and fry. This work is focused on a small‐scale differentiation in sea trout populations from one basin with a strong emphasis on the relationship between wild and hatchery origin fish. A total of 216 sea trout were genotyped at 10 microsatellite loci. Global FST obtained by amova was low at 0.0165. Pairwise FST were significant for all tests except wild and stocked adults. The highest pairwise difference was found between the hatchery sample and Kwacza (FST = 0.038). Analysis of the genetic structure revealed micro‐geographical differentiation with four subpopulations. The quality of the artificial spawning was found not to be adequate with a high risk of adverse effects to the whole population. All future stocking actions in the basin should consider the existing population structures. |
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| Keywords: | artificial spawning gene flow genetic structure microsatellite DNA sea trout supplementary stocking |
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