Intraspecific variation, sex-biased dispersal and phylogeography of the eastern grey kangaroo (Macropus giganteus)

被引:0
作者
K R Zenger
M D B Eldridge
D W Cooper
机构
[1] Macquarie University,Department of Biological Sciences
来源
Heredity | 2003年 / 91卷
关键词
kangaroos; genetic diversity; dispersal; mtDNA; microsatellites;
D O I
暂无
中图分类号
学科分类号
摘要
Genetic information has played an important role in the development of management units by focusing attention on the evolutionary properties and genetics of populations. Wildlife authorities cannot hope to manage species effectively without knowledge of geographical boundaries and demic structure. The present investigation provides an analysis of mitochondiral DNA and microsatellite data, which is used to infer both historical and contemporary patterns of population structuring and dispersal in the eastern grey kangaroo (Macropus giganteus) in Australia. The average level of genetic variation across sample locations was one of the highest observed for marsupials (h=0.95, HE=0.82). Contrary to ecological studies, both genic and genotypic analyses reveal weak genetic structure of populations, where high levels of dispersal may be inferred up to 230 km. The movement of individuals was predominantly male-biased (average Nem=22.61, average Nfm=2.73). However, neither sex showed significant isolation by distance. On a continental scale, there was strong genetic differentiation and phylogeographic distinction between southern (TAS, VIC and NSW) and northern (QLD) populations, indicating a current and/or historical restriction of gene flow. In addition, it is evident that northern populations are historically more recent, and were derived from a small number of southern founders. Phylogenetic comparisons between M. g. giganteus and M. g. tasmaniensis indicated that the current taxonomic status of these subspecies should be revised as there was a lack of genetic differentiation between the populations sampled.
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页码:153 / 162
页数:9
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