O'Brien John, Mariani Carol, Olson Link, Russell Amy L, Say Ludovic, Yoder Anne D, Hayden Tom J
School of Biological and Environmental Science, Education and Research Centre West, University College Dublin, Dublin, Ireland.
Mol Phylogenet Evol. 2009 May;51(2):294-303. doi: 10.1016/j.ympev.2009.02.010. Epub 2009 Feb 26.
We investigate the genetic relationships between purported island species of Pteropus fruit bat (Megachiroptera) from the western Indian Ocean islands using mitochondrial DNA sequencing in order to infer the pattern of colonisation of this biogeographic region. Most significantly, our genetic data questions the current taxonomic assignment based on morphology of many of the island species and subspecies, suggesting instead that many of the western Indian Ocean islands harbour 'races' of P. giganteus from mainland India. Our results strongly argue against a single colonisation event from mainland Asia. Evidence is presented for three colonisation events; the first to the western-most extremity of their range (Comoros and Pemba Island), the second to Rodrigues Island; and a third giving rise to the remaining extant island taxa, the latter two events occurring relatively recently and rapidly.
我们利用线粒体DNA测序技术，研究了来自西印度洋岛屿的狐蝠属（Megachiroptera）果蝠所谓岛屿物种之间的遗传关系，以便推断该生物地理区域的殖民模式。最重要的是，我们的遗传数据对目前基于许多岛屿物种和亚种形态学的分类学归属提出了质疑，相反表明西印度洋的许多岛屿栖息着来自印度大陆的巨大狐蝠“种族”。我们的结果强烈反对来自亚洲大陆的单一殖民事件。文中给出了三次殖民事件的证据：第一次到达其分布最西端（科摩罗和奔巴岛），第二次到达罗德里格斯岛；第三次形成了其余现存的岛屿分类群，后两次事件发生的时间相对较近且迅速。
