Demography of bridled nailtail wallabies translocated to the edge of their former range from captive and wild stock

Pople, Anthony; Lowry, Janelle; Lundie-Jenkins, Geoff; Clancy, Timothy F.; McCallum, Hamish; Sigg, Dominique P.; Hoolihan, D. W.; Hamilton, Sheryl

doi:10.1016/s0006-3207(01)00101-x

Cited by 45 publications

(42 citation statements)

References 24 publications

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“…Our results indicate that the reintroduction of O. fraenata to Avocet Nature Refuge in 2001-2005 is at risk of failure, in contrast with the 1996-1998 reintroduction to Idalia National Park, which appears to have succeeded ( Table 3; Pople et al, 2001). The population at Avocet was a tenth of the size of that of Idalia National Park after 3 years, and the mean estimate of population size on Avocet Nature Refuge (c. 40) was considerably smaller than expected given the release of 166 animals since 2001.…”

Section: Discussionmentioning

confidence: 75%

“…Translocations and reintroductions are more likely to fail if factors that caused declines are not dealt with (Wolf et al, 1996(Wolf et al, , 1998. At Idalia intensive baiting in the release area and a surrounding buffer zone and regular predator monitoring occur and there is therefore little or no predation on O. fraenata (Pople et al, 2001). At Avocet Nature Refuge there is incidental removal of cats and foxes but no intensive control.…”

Section: Discussionmentioning

confidence: 99%

“…Densities at Idalia and Taunton National Parks have been estimated with distance sampling (Fisher et al, 2000;Pople et al, 2001) but we observed too few individuals (14) to use this method. We therefore estimated density by dividing the total number of O. fraenata seen each night by the area sampled by transects (2 km 2 ).…”

Section: Data Analysesmentioning

confidence: 93%

“…Surveys were conducted between 20.00 and 23.00, when O. fraenata is active, in a vehicle travelling at 10 km h −1 along 5.6 km of unsealed tracks. This is the same sampling method as that of Fisher et al (2000) and Pople et al (2001), who showed by radio-tracking that O. fraenata readily use the edges of blocks of forest, including unsealed tracks, which often have pasture growing on and along them. It was not possible to use walked transects because O. fraenata flee from people on foot, whereas they usually ignore vehicles (Evans, 1992;Fisher et al, 2000).…”

Section: Spotlightingmentioning

confidence: 99%

“…We calculated body condition indices as residuals from a regression of body mass on leg length (Fisher, 1999;Fisher et al, 2000;Pople et al, 2001) for adults. Body mass and leg length measurements, and condition and health scores were averaged per year for individuals captured more than once, to ensure statistical independence.…”

Section: Data Analysesmentioning

confidence: 99%

See 4 more Smart Citations

Establishment of an Endangered species on a private nature refuge: what can we learn from reintroductions of the bridled nailtail wallaby Onychogalea fraenata?

Kingsley

Goldizen

Fisher

2012

Oryx

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Translocation and reintroduction are used to reduce extinction risk associated with a small population and range size in threatened mammal species. We evaluated the outcome of a reintroduction of the bridled nailtail wallaby Onychogalea fraenata to Avocet Nature Refuge, a private refuge in central Queensland, Australia. This macropod was also reintroduced to Idalia National Park in western Queensland in 1996 and occurs in one natural population in central Queensland. We estimated population growth, adult and juvenile survival, and distribution changes since the last release of O. fraenata to Avocet in 2005, and evaluated female reproductive success and health. Although animals were in good condition, population size was a tenth of that of the 1996 Idalia reintroduction reported after 3 years and, unlike at Idalia, juvenile survival at Avocet was low. The likely causes are consistent with predictors of translocation and reintroduction failures in mammals. These are predation, the small number of individuals in each release, the likely suboptimal health status of reintroduced individuals, drought, and possibly lack of dispersal from the small area of preferred habitat. The lessons of this reintroduction are that future attempts are likely to have the best chance of success if they occur in nondrought years, at sites with large, non-fragmented areas of brigalow forest, involve the release of large groups of animals together, and are accompanied by intensive, longterm baiting to control introduced predators.

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Section: Discussionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Section: Data Analysesmentioning

confidence: 93%

Section: Spotlightingmentioning

confidence: 99%

Section: Data Analysesmentioning

confidence: 99%

See 3 more Smart Citations

Establishment of an Endangered species on a private nature refuge: what can we learn from reintroductions of the bridled nailtail wallaby Onychogalea fraenata?

Kingsley

Goldizen

Fisher

2012

Oryx

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Reduced genetic diversity and significant genetic differentiation after translocation: Comparison of the remnant and translocated populations of bridled nailtail wallabies (Onychogalea fraenata)

Sigg

2006

Conserv Genet

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Loss of genetic diversity and increased population differentiation from source populations are common problems associated with translocation programmes established from captive-bred stock or a small number of founders. The bridled nailtail wallaby is one of the most endangered macropods in Australia, having been reduced to a single remnant population in the last 100 years. A translocated population of bridled nailtail wallabies was established using animals sourced directly from the remnant population (wild-released) as well as the progeny of animals collected for a captive breeding programme (captive-bred). The aims of this study were to compare genetic diversity among released animals and their wild-born progeny to genetic diversity observed in the remnant population, and to monitor changes in genetic diversity over time as more animals were released into the population. Heterozygosity did not differ between the translocated and remnant population; however, allelic diversity was significantly reduced across all released animals and their wild-born progeny. Animals bred in captivity and their wild-born progeny were also significantly differentiated from the source population after just four generations. Wild-released animals, however, were representative of the source population and several alleles were unique to this group. Both heterozygosity and allelic diversity among translocated animals decreased over time with the additional release of captivebred animals, as no new genetic stock was added to the population. Captive breeding programmes can provide large numbers of animals for release, but this study highlights the importance of sourcing animals directly from remnant populations in order to maintain genetic diversity and minimise genetic drift.

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Conservation of brown bear in the Alps: space use and settlement behavior of reintroduced bears

Preatoni

Mustoni²,

Martinoli

et al. 2005

Acta Oecologica

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Demography of bridled nailtail wallabies translocated to the edge of their former range from captive and wild stock

Cited by 45 publications

References 24 publications

Establishment of an Endangered species on a private nature refuge: what can we learn from reintroductions of the bridled nailtail wallaby Onychogalea fraenata?

Establishment of an Endangered species on a private nature refuge: what can we learn from reintroductions of the bridled nailtail wallaby Onychogalea fraenata?

Reduced genetic diversity and significant genetic differentiation after translocation: Comparison of the remnant and translocated populations of bridled nailtail wallabies (Onychogalea fraenata)

Conservation of brown bear in the Alps: space use and settlement behavior of reintroduced bears

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