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- W1980584065 abstract "A morphologically distinct subspecies of black-footed rock-wallaby (Petrogale lateralis pearsoni), is naturally found only on North Pearson Island (~160 ha) in the Investigator Group, SA, where it was isolated by rising sea levels ~10 500 years ago. Subsequent translocations have seen additional populations established on Middle-South Pearson Island (~53 ha) in 1960 and Wedge Island (96 ha) in 1975. We have used 10 hypervariable microsatellite loci to examine the levels of genetic diversity in the endemic (n = 38) and translocated (n = 45–77) P. l. pearsoni populations compared with mainland P. lateralis populations (n = 19–52). Results show that all sampled P. l. pearsoni populations have very low levels of genetic diversity (A = 1.5–1.9; HE = 0.02–0.13) compared with mainland populations (A = 3.5–12.7; HE = 0.54–0.87). Intriguingly, more diversity was detected in the translocated Middle-South Pearson population than in its source population from North Pearson Island. In contrast, the Wedge Island population was almost monomorphic. Overall, the severe loss of genetic diversity (up to 98%) in P. l. pearsoni populations appears to result from random genetic drift on a small isolated population, exacerbated by some subsequent one-off translocation events. Although additional supplementary translocations are recommended to enhance genetic diversity, populations of P. l. pearsoni are likely to remain inherently vulnerable to extinction and therefore of special conservation concern." @default.
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- W1980584065 date "2011-01-01" @default.
- W1980584065 modified "2023-09-25" @default.
- W1980584065 title "The impact of isolation and bottlenecks on genetic diversity in the Pearson Island population of the black-footed rock-wallaby (Petrogale lateralis pearsoni; Marsupialia:Macropodidae)" @default.
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- W1980584065 doi "https://doi.org/10.1071/am11011" @default.
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