globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0121075
论文题名:
Introgression Threatens the Survival of the Critically Endangered Freshwater Crayfish Cherax tenuimanus (Decapoda: Parastacidae) in the Wild
作者: Clodagh Guildea; Yvette Hitchen; Rodney Duffy; P. Joana Dias; Jason M. Ledger; Michael Snow; W. Jason Kennington
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2015
发表日期: 2015-3-23
卷: 10, 期:3
语种: 英语
英文关键词: Population genetics ; Introgression ; Genetic loci ; Simulation and modeling ; Crayfish ; Fresh water ; Genetic polymorphism ; Invasive species
英文摘要: Hybridization and genetic introgression following the introduction of exotic species can pose a significant threat to the survival of geographically restricted species. A remnant population of the critically endangered freshwater crayfish Cherax tenuimanus in the upper reaches of the Margaret River in southwestern Australia is under threat following the introduction and spread of its congener Cherax cainii. Here, we examine the extent of hybridization and introgression between the two species using twelve polymorphic microsatellite loci. Our study reveals there are three times more C. cainii than C. tenuimanus at our study site in the upper reaches of the Margaret River. There is also evidence of hybridization and introgression between C. tenuimanus and C. cainii at this site, with F1, F2 and backcrossed individuals identified. While interbreeding was confirmed in this study, our simulations suggest that the levels of introgression are much lower than would be expected under random mating, indicating partial reproductive barriers exist. Nevertheless, it is apparent that hybridization and introgression with C. cainii pose a serious threat to C. tenuimanus and their survival in the wild will require active adaptive management and continued genetic monitoring to evaluate management effectiveness.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0121075&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/21384
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: Centre for Evolutionary Biology, School of Animal Biology, The University of Western Australia, Crawley, WA 6009, Australia;Helix Molecular Solutions, PO Box 155, Leederville, WA 6903, Australia;Department of Fisheries, Government of Western Australia, Western Australian Fisheries and Marine Research Laboratories, PO Box 20, North Beach, WA 6920, Australia;Centre for Evolutionary Biology, School of Animal Biology, The University of Western Australia, Crawley, WA 6009, Australia;Department of Fisheries, Government of Western Australia, Western Australian Fisheries and Marine Research Laboratories, PO Box 20, North Beach, WA 6920, Australia;School of Animal Biology, The University of Western Australia, Crawley, WA 6009, Australia;Department of Fisheries, Government of Western Australia, Western Australian Fisheries and Marine Research Laboratories, PO Box 20, North Beach, WA 6920, Australia;Centre for Evolutionary Biology, School of Animal Biology, The University of Western Australia, Crawley, WA 6009, Australia

Recommended Citation:
Clodagh Guildea,Yvette Hitchen,Rodney Duffy,et al. Introgression Threatens the Survival of the Critically Endangered Freshwater Crayfish Cherax tenuimanus (Decapoda: Parastacidae) in the Wild[J]. PLOS ONE,2015-01-01,10(3)
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