Genetic variation in blue whales in the eastern pacific: implication for taxonomy and use of common wintering grounds
Genetic variation in blue whales in the eastern pacific: implication for taxonomy and use of common wintering grounds
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DOI：
10.1111/mec.13940
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发表时间：
2017-02-01
影响因子：
4.9
通讯作者：
Taylor, B. L.
中科院分区：
文献类型：
--
作者：
Leduc, R. G.;Archer, F. I.;Taylor, B. L.
蓝鲸生物学的许多方面都知之甚少。我们知识中的一些差距，例如关于蓝鲸基本分类和季节性运动的知识，直接影响我们监测和管理蓝鲸种群的能力。作为填补其中一些空白的一步，对来自南半球、热带东太平洋和东北太平洋的蓝鲸样本进行了微卫星和线粒体DNA序列分析。结果表明，ETP是差异使用的蓝鲸从北方和东南太平洋，与前者表现出较强的亲和力，以中美洲地区称为哥斯达黎加圆顶，后者有利于秘鲁和厄瓜多尔的沃茨。虽然整个南半球的遗传变异模式与最近提出的智利蓝鲸的亚种地位是一致的，但捕获长度与航空摄影长度之间仍存在一些差异，并且并非智利沃茨的所有蓝鲸都可以被认为是这种类型。此外，拟议的智利亚种的范围，延伸到加拉帕戈斯地区的ETP，至少季节性，也许应该包括哥斯达黎加圆顶和北太平洋东部以及。
Many aspects of blue whale biology are poorly understood. Some of the gaps in our knowledge, such as those regarding their basic taxonomy and seasonal movements, directly affect our ability to monitor and manage blue whale populations. As a step towards filling in some of these gaps, microsatellite and mtDNA sequence analyses were conducted on blue whale samples from the Southern Hemisphere, the eastern tropical Pacific (ETP) and the northeast Pacific. The results indicate that the ETP is differentially used by blue whales from the northern and southern eastern Pacific, with the former showing stronger affinity to the region off Central America known as the Costa Rican Dome, and the latter favouring the waters of Peru and Ecuador. Although the pattern of genetic variation throughout the Southern Hemisphere is compatible with the recently proposed subspecies status of Chilean blue whales, some discrepancies remain between catch lengths and lengths from aerial photography, and not all blue whales in Chilean waters can be assumed to be of this type. Also, the range of the proposed Chilean subspecies, which extends to the Galapagos region of the ETP, at least seasonally, perhaps should include the Costa Rican Dome and the eastern North Pacific as well.