Genetic Diversity in Remnant Mainland and “Pristine” Island Populations of Three Endemic Australian Macropodids (Marsupialia): Macropus Eugenii, Lagorchestes Hirsutus and Petrogale Lateralis

Eldridge, Mark D. B.; Kinnear, J.E.; Zenger, Kyall R.; McKenzie, Louise; Spencer, Peter B. S.

doi:10.1023/b:coge.0000031148.59923.aa

Cited by 65 publications

(62 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In fact, genetic variation is lowest for Y chromosome loci in both populations. Previous studies (Taylor and Cooper, 1999;Eldridge et al, 2004) observed lower genetic diversity for Garden Island than for Kangaroo Island using autosomal markers alone, we now observe the same trend using additional sex-linked markers.…”

Section: Discussionsupporting

confidence: 84%

“…It is possible that a founder effect or an historic bottleneck, that occurred when rising sea levels isolated the Garden Island tammar wallabies from the mainland West Australian populations, may have contributed to the low levels of genetic diversity observed in this population (this study ). We note that our mean H e estimates for autosomal loci are lower than those obtained in previous studies (Taylor and Cooper, 1999;Eldridge et al, 2004). These differences could reflect variation in levels of diversity at the different loci used, but another possible explanation is that all tissue samples used by us were collected from a single region of each island, whereas the previous studies may have drawn on a greater number of collection sites, particularly on the much larger Kangaroo Island.…”

Section: Discussioncontrasting

confidence: 77%

See 1 more Smart Citation

Sex-linked and autosomal microsatellites provide new insights into island populations of the tammar wallaby

et al. 2013

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 84%

Section: Discussioncontrasting

confidence: 77%

Sex-linked and autosomal microsatellites provide new insights into island populations of the tammar wallaby

et al. 2013

View full text Add to dashboard Cite

“…It is noteworthy that despite the close proximity of Tutakin and Sales (two control sites, Fig. 1), DNA microsatellite analyses found that these populations are distinct (Eldridge et al 2001(Eldridge et al , 2004. The distribution of RW populations, both past and present (Pearson and Kinnear 1997) implies that it is a species with a classic metapopulation structure maintained by dispersal, and two cases were observed during the present study after population recoveries.…”

Section: Predator-baiting Studies: What Has Been Learned?mentioning

confidence: 51%

Predator-baiting experiments for the conservation of rock-wallabies in Western Australia: a 25-year review with recent advances

Kinnear¹,

Krebs

Pentland

et al. 2010

Wildl. Res.

View full text Add to dashboard Cite

Abstract. Predation is widely believed to be the main threatening process for many native vertebrates in Australia. For 25 years, predator-baiting experiments have been used in the Western Australian Central Wheatbelt to control red fox predation on rock-wallabies and other endangered marsupial prey elsewhere. We review here the history of a series of baiting experiments designed to protect rock-wallaby colonies by controlling red foxes with 1080 poison baits. We continue to support the conclusion that red foxes can reduce or exterminate rock-wallaby populations in Western Australia. Research trials from 1990 to 2008 have uniformly shown a dramatic recovery of rock-wallaby populations once red foxes are baited. Baiting experiments are often black boxes and their success should not blind us to their weaknesses. Ideally, what we would like to measure are the functional responses of predators to prey abundance directly. As a contribution towards this goal, we describe new technology that enables one to determine which predator killed which prey, at exactly what time, with improved research and management outcomes.

show abstract

“…comm), but an interrogation of the effects of fire on island demography remains an enticing area of investigation. However, fire event notwithstanding, the demographic stochasticity associated with small populations and the environmental stochasticity of island systems can often lead to periodic bottlenecks under these conditions (Eldridge et al 2004;Bouzat 2010;Miller et al 2011).…”

Section: Genetic Variation Within Island Populationsmentioning

confidence: 99%

“…This has made them an attractive solution to many conservation issues (Eldridge et al 2004), but factors such as founder effect and genetic drift are now thought to exhibit a strong influence on population persistence and mitigate the success of conservation strategies (White and Searle 2007). The study of island biota can not only inform the in situ management of insular populations, but may also promote a better decision-making framework for the management of island-like effects of fragmentation on the mainland (e.g.…”

Section: Introductionmentioning

confidence: 99%

Island size and remoteness have major conservation significance for how spatial diversity is partitioned in skinks

et al. 2015

View full text Add to dashboard Cite

Islands are often acknowledged as a refuge for species with declining mainland distributions. However, as the finite size of islands coupled with isolation can lead to genetic deterioration within insular populations, the study of these systems is of great interest to the conservation of biological diversity and persistence. The remote Kimberley region in Western Australia is facing increased impacts from invasive species, habitat fragmentation, grazing, mining and altered fire regimes, and many of the 2633 islands in the Kimberley have come into focus as a significant conservation resource. The Barshouldered skink (Ctenotus inornatus) is a habitat generalist that is highly abundant throughout the Kimberley and its diverse islands. This study encompasses 41 islands and seven mainland populations in the vast Kimberley environment, and genetically characterises them using 18 nuclear (microsatellite) markers. The island populations lost heterozygosity at a rate of 1 % per kilometre from the mainland. Diversity was significantly lower on islands of small size (\500 ha) and greater than 2 km from the coastline. The scope of this study is unparalleled and addresses an important gap in our understanding of the genetic diversity throughout ecosystems. The findings illustrate how populations, operating within these pristine island systems, conform to the general rule of decreased genetic diversity with decreasing island area and increased distance from the mainland and identifies islands that may hold the most potential for conserving biodiversity.

show abstract

Genetic Diversity in Remnant Mainland and “Pristine” Island Populations of Three Endemic Australian Macropodids (Marsupialia): Macropus Eugenii, Lagorchestes Hirsutus and Petrogale Lateralis

Cited by 65 publications

References 83 publications

Sex-linked and autosomal microsatellites provide new insights into island populations of the tammar wallaby

Sex-linked and autosomal microsatellites provide new insights into island populations of the tammar wallaby

Predator-baiting experiments for the conservation of rock-wallabies in Western Australia: a 25-year review with recent advances

Island size and remoteness have major conservation significance for how spatial diversity is partitioned in skinks

Contact Info

Product

Resources

About