INFLUENCE OF SEASONAL MIGRATION ON GEOGRAPHIC-DISTRIBUTION OF MITOCHONDRIAL-DNA HAPLOTYPES IN HUMPBACK WHALES
INFLUENCE OF SEASONAL MIGRATION ON GEOGRAPHIC-DISTRIBUTION OF MITOCHONDRIAL-DNA HAPLOTYPES IN HUMPBACK WHALES
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DOI：
10.1038/344238a0
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发表时间：
1990-03-15
期刊：
影响因子：
64.8
通讯作者：
OBRIEN, SJ
中科院分区：
文献类型：
--
作者：
BAKER, CS;PALUMBI, SR;OBRIEN, SJ
驼背鲸（Megaptera novaeangliae）每年在温带或近极地沃茨的夏季觅食地和热带浅水区的冬季繁殖地之间迁移近10，000公里1。对有标记个体的观察表明，座头鲸的主要海洋种群被分为许多不同的季节性亚种群，这些亚种群没有被明显的地理障碍所分隔。为了测试这些观察到的分布和迁移模式是否反映在种群的遗传结构中，我们在北太平洋和北大西洋西部的不同觅食和越冬地寻找84头座头鲸的线粒体DNA变异。限制性片段分析的基础上，我们现在报告一个显着的分离的线粒体DNA单倍型之间的亚群，以及两个海洋。我们把这种隔离解释为母亲对移民目的地的忠诚的结果。
HUMPBACK whales (Megaptera novaeangliae) migrate nearly 10,000 km each year between summer feeding grounds in temperate or near-polar waters and winter breeding grounds in shallow tropical waters1. Observations of marked individuals suggest that major oceanic populations of humpback whales are divided into a number of distinct seasonal subpopulations which are not separated by obvious geographic barriers2,3. To test whether these observed patterns of distribution and migration are reflected in the genetic structure of populations, we looked for variation in the mitochondrial DNA of 84 individual humpback whales on different feeding and wintering grounds of the North Pacific and western North Atlantic oceans. On the basis of restriction-fragment analysis, we now report a marked segregation of mitochondrial DNA haplotypes among subpopulations as well as between the two oceans. We interpret this segregation to be the consequence of maternally directed fidelity to migratory destinations.