Temporal variation of genetic composition in Atlantic salmon populations from the Western White Sea Basin: influence of anthropogenic factors?

BMC Genetics

Craig R Primmer¹  Jaakko Lumme²  Alexey E Veselov³  Mikhail Yu Ozerov⁴ 

[1] Department of Biology, Division of Genetics and Physiology, University of Turku, 20014 Turku, Finland;Department of Biology, University of Oulu, P.O. Box 3000, 90014 Oulu, Finland;Institute of Biology, Karelian Research Centre RAS, Pushkinskaya 11, 185610 Petrozavodsk, Russia;Kevo Subarctic Research Institute, University of Turku, Turku 20014, Finland

关键词: Fishing pressure;    Genetic structure;    Genetic diversity;    Temporal variation;    Atlantic salmon;   

Others  :  1086645
DOI  :  10.1186/1471-2156-14-88

 received in 2013-05-25, accepted in 2013-09-19,  发布年份 2013

【 摘 要 】

Background

Studies of the temporal patterns of population genetic structure assist in evaluating the consequences of demographic and environmental changes on population stability and persistence. In this study, we evaluated the level of temporal genetic variation in 16 anadromous and 2 freshwater salmon populations from the Western White Sea Basin (Russia) using samples collected between 1995 and 2008. To assess whether the genetic stability was affected by human activity, we also evaluated the effect of fishing pressure on the temporal genetic variation in this region.

Results

We found that the genetic structure of salmon populations in this region was relatively stable over a period of 1.5 to 2.5 generations. However, the level of temporal variation varied among geographical regions: anadromous salmon of the Kola Peninsula exhibited a higher stability compared to that of the anadromous and freshwater salmon from the Karelian White Sea coast. This discrepancy was most likely attributed to the higher census, and therefore effective, population sizes of the populations inhabiting the rivers of the Kola Peninsula compared to salmon of the Karelian White Sea coast. Importantly, changes in the genetic diversity observed in a few anadromous populations were best explained by the increased level of fishing pressure in these populations rather than environmental variation or the negative effects of hatchery escapees. The observed population genetic patterns of isolation by distance remained consistent among earlier and more recent samples, which support the stability of the genetic structure over the period studied.

Conclusions

Given the increasing level of fishing pressure in the Western White Sea Basin and the higher level of temporal variation in populations exhibiting small census and effective population sizes, further genetic monitoring in this region is recommended, particularly on populations from the Karelian rivers.

【 授权许可】

   
2013 Ozerov et al.; licensee BioMed Central Ltd.

【 图 表 】

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