Low genetic variation among killer whales (Orcinus orca) in the eastern North Pacific and genetic differentiation between foraging specialists
Low genetic variation among killer whales (Orcinus orca) in the eastern North Pacific and genetic differentiation between foraging specialists
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DOI：
10.1093/jhered/89.2.121
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发表时间：
1998-03-01
影响因子：
3.1
通讯作者：
Stern, SJ
中科院分区：
文献类型：
--
作者：
Hoelzel, AR;Dahlheim, M;Stern, SJ
从加州到阿拉斯加的沿海沃茨的虎鲸在三个核DNA标记上进行了遗传变异比较，并对线粒体控制区的520 bp进行了测序。两个假定的同域分布的人口，在整个这一地区进行了比较。他们可以区分社会和觅食行为，被称为“居民”和“过境”。“与其他鲸目动物物种相比，我们发现种群内的变异水平很低。鱼类（居民）与海洋哺乳动物（瞬态）觅食专家之间的比较表明，在核和线粒体基因座的遗传分化非常显着。这种分化与种内变异在一定程度上是一致的。两个parapatric居民人群之间的比较显示了一个小的，但固定的mtDNA单倍型差异。总之，这些数据表明低水平的觅食专家之间的遗传扩散和模式的遗传分化与matrifocal人口结构和小的有效人口规模相一致。
Killer whales from the coastal waters off California through Alaska were compared for genetic variation at three nuclear DNA markers and sequenced for a total of 520 bp from the mitochondrial control region. Two putative sympatric populations that range throughout this region were compared. They can be distinguished by social and foraging behavior and are known as "residents" and "transients." We found low levels of variation within populations compared to other cetacean species. Comparisons between fish (resident) versus marine mammal (transient) foraging specialists indicated highly significant genetic differentiation at both nuclear and mitochondrial loci. This differentiation is at a level consistent with intraspecific variation. A comparison between two parapatric resident populations showed a small but fixed mtDNA haplotype difference. Together these data suggest low levels of genetic dispersal between foraging specialists and a pattern of genetic differentiation consistent with matrifocal population structure and small effective population size.