Genetic characteristics of the Black-footed Albatross Diomedea nigripes on the Bonin Islands and their implications for the species' demographic history and population structure
Genetic characteristics of the Black-footed Albatross Diomedea nigripes on the Bonin Islands and their implications for the species' demographic history and population structure
复制标题
DOI：
10.2326/1347-0558-7.2.109
复制
发表时间：
2008-12-01
影响因子：
0.6
通讯作者：
Koike, Hiroko
中科院分区：
文献类型：
--
作者：
Eda, Masaki;Kawakami, Kazuto;Koike, Hiroko
黑脚信天翁Diomedea nigripes是北太平洋特有的濒危海鸟。黑脚信天翁种群的遗传结构的夏威夷群岛和日本伊豆鸟岛，命中以前研究，使用线粒体细胞色素B区。夏威夷和日本的繁殖群体在遗传上是不同的，伊豆鸟岛的鸟类的遗传多样性低于夏威夷群岛的鸟类。我们分析了50个黑脚信天翁从小笠原群岛，在那里一个相对稳定的人口持续整个世纪。虽然小笠原群岛的信天翁与伊豆鸟岛的信天翁在细胞色素B区序列上没有显著差异，但它们确实表现出更高的遗传多样性（与夏威夷殖民地的信天翁一样高）。一个统计简约网络揭示了两个分支，一个主要是在西北太平洋殖民地和其他主要在东北太平洋殖民地。尽管西北太平洋的种群繁殖规模仅为东太平洋的5%左右，但两个种群的总繁殖网络呈哑铃形，表明两个种群都在近期进行了种群扩张。我们的研究结果表明，黑脚信天翁在小笠原和夏威夷群岛不同的遗传，但可比的自然生物单位的保护和管理的目的。
The Black-footed Albatross Diomedea nigripes is in endangered seabird that is endemic to the North Pacific. The genetic Structure of Black-footed Albatross populations on three of the Hawaiian Islands and on Izu-Torishima Island, Japan, hits been studied previously, using the mitochondrial cytochrome b region. Hawaiian and Japanese breeding groups are genetically different, and the genetic diversity of the birds on Izu-Torishima is lower than that of birds in the Hawaiian Islands. We analyzed 50 Black-footed Albatrosses from the Bonin Islands, where a relatively stable population persisted throughout the twentieth century. Although albatrosses in the Bonin Islands do not differ significantly from those on Izu-Torishima in their cytochrome b region sequences, they do exhibit higher genetic diversity (as high as those from the Hawaiian colonies). A statistical parsimony network revealed two clades, one primarily in the western North Pacific colonies and the other primarily in eastern North Pacific colonies. The total network appears its a dumbbell-shaped phylogeny, suggesting recent population expansion in both populations, although the population breeding in the western North Pacific is only about 5% of the size of that in the eastern North Pacific. Our results suggest that Black-footed Albatrosses in the Bonin and the Hawaiian Islands differ genetically but are comparable natural biological units for conservation and management purposes.