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Low genetic diversity in the bottlenecked population of endangered non-native banteng in northern Australia

Bradshaw, Corey J. A., Isagi, Y., Kaneko, S., Brook, Barry William, Bowman, David M. J. S. and Frankham, R. (2007). Low genetic diversity in the bottlenecked population of endangered non-native banteng in northern Australia. Molecular Ecology,16(14):2998-3008.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 11 times in Scopus Article | Citations
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IRMA ID A00003xPUB38
Title Low genetic diversity in the bottlenecked population of endangered non-native banteng in northern Australia
Author Bradshaw, Corey J. A.
Isagi, Y.
Kaneko, S.
Brook, Barry William
Bowman, David M. J. S.
Frankham, R.
Journal Name Molecular Ecology
Publication Date 2007
Volume Number 16
Issue Number 14
ISSN 1365-294X   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-34447118230
Start Page 2998
End Page 3008
Total Pages 11
Place of Publication Oxford, England
Publisher Blackwell Publishing
Field of Research 0602 - Ecology
HERDC Category C1 - Journal Article (DEST)
Abstract Undomesticated (wild) banteng are endangered in their native habitats in Southeast Asia. A potential conservation resource for the species is a large, wild population in Garig Gunak Barlu National Park in northern Australia, descended from 20 individuals that were released from a failed British outpost in 1849. Because of the founding bottleneck, we determined the level of genetic diversity in four subpopulations in the national park using 12 microsatellite loci, and compared this to the genetic diversity of domesticated Asian Bali cattle, wild banteng and other cattle species. We also compared the loss of genetic diversity using plausible genetic data coupled to a stochastic Leslie matrix model constructed from existing demographic data. The 53 Australian banteng sampled had average microsatellite heterozygosity (H-E) of 28% compared to 67% for outbred Bos taurus and domesticated Bos javanicus populations. The Australian banteng inbreeding coefficient (F) of 0.58 is high compared to other endangered artiodactyl populations. The 95% confidence bounds for measured heterozygosity overlapped with those predicted from our stochastic Leslie matrix population model. Collectively, these results show that Australian banteng have suffered a loss of genetic diversity and are highly inbred because of the initial population bottleneck and subsequent small population sizes. We conclude that the Australian population is an important hedge against the complete loss of wild banteng, and it can augment threatened populations of banteng in their native range. This study indicates the genetic value of small populations of endangered artiodactyls established ex situ.
Keywords augmentation
Bos javanicus
endangered species
founder effect
genetic diversity
Leslie matrix
projection model
buffalo bubalus bubali
deer cervus nippon
microsatellite analysis
inbreeding depression
conservation genetics
extinction risk
polymorphic microsatellite
isalnd population
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