The effect of migratory behaviour on genetic diversity and population divergence: a comparison of anadromous and freshwater Atlantic salmon Salmo salar
The effect of migratory behaviour on genetic diversity and population divergence: a comparison of anadromous and freshwater Atlantic salmon Salmo salar
复制标题
洄游行为对遗传多样性和种群分化的影响：溯河产卵和淡水大西洋鲑鱼 Salmo salar 的比较
DOI：
10.1111/j.1095-8649.2007.01519.x
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
C. Primmer
中科院分区：
文献类型：
--
作者：
Anni Tonteri;A. Veselov;S. Titov;J. Lumme;C. Primmer
大西洋鲑鱼种群，即使在校正种群大小差异后。种群的地理来源也对种群的遗传多样性特征有显著影响：大西洋、白色海和巴伦支海流域的溯河产卵种群比波罗的海流域的溯河产卵种群具有更高水平的遗传多样性。在淡水种群中，结果正好相反：波罗的海淡水种群的变化更大。本研究的结果表明，淡水种群和溯河产卵种群之间的长期基因流水平的差异导致了不同水平的遗传多样性，这也证明了分子方差的层次分析。此外，研究结果强调了在制定保护战略时考虑种群生活史的重要性：由于通过基因流产生新的遗传多样性的可能性有限，预计淡水大西洋鲑鱼种群在种群崩溃后更容易灭绝。因此，高保护地位是必要的，以确保长期生存的欧洲人口的有限数量与这种生活史策略。
Atlantic salmon populations, even after correcting for differences in stock size. The phylogeographic origin of the populations also had a significant effect on the genetic diversity characteristics of populations: anadromous populations from the basins of the Atlantic Ocean, White Sea and Barents Sea possessed higher levels of genetic diversity than anadromous populations from the Baltic Sea basin. Among the freshwater populations, the result was the opposite: the Baltic freshwater populations were more variable. The results of this study imply that differences in the level of long-term gene flow between freshwater populations and anadromous populations have led to different levels of genetic diversity, which was also evidenced by the hierarchical analysis of molecular variance. Furthermore, the results emphasize the importance of taking the life history of a population into consideration when developing conservation strategies: due to the limited possibilities for new genetic diversity to be generated via gene flow, it is expected that freshwater Atlantic salmon populations would be more vulnerable to extinction following a population crash. Hence, high conservation status is warranted in order to ensure the long-term survival of the limited number of European populations with this life-history strategy.