A Breeding Season Difference in Two Populations of the Australian Macropod Marsupial (Setonix brachyurus)

Shield, John

doi:10.2307/1377332

Cited by 29 publications

(27 citation statements)

References 5 publications

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“…The age of first breeding for females in this study (15 months) was much older than that observed in captive quokkas (8-9 months; Shield, 1968) but younger than Rottnest Island (18-30 months;Shield, 1964). Captive males start breeding at 12-13 months (Shield, 1968) but on Rottnest Island at over two years (Shield, 1964).…”

Section: Reproductioncontrasting

confidence: 52%

“…In this study, births were far more evenly distributed throughout the year than for quokkas on Rottnest Island (Shield, 1964) (Fig. 5), however they were still not uniformly distributed (Kolmogorov-Smirnov test D=0.19, d.f.=57, 0.02 < P < 0.05).…”

Section: Reproductionmentioning

confidence: 48%

“…5. Percentage of quokkas born each month in the northern jarrah forest (this study) (black) (n=57) and Rottnest Island (unfilled) (n=299 taken from Shield, 1964). present study are well below the carrying capacity of each site.…”

Section: Population Sizesmentioning

confidence: 65%

“…Captive males start breeding at 12-13 months (Shield, 1968) but on Rottnest Island at over two years (Shield, 1964).…”

Section: Reproductionmentioning

confidence: 99%

“…Quokkas have been extensively studied on Rottnest Island; however environmental and ecological differences between the island and mainland suggest ecological attributes cannot be extrapolated between the two (White, 1952;Dunnet, 1962;Shield, 1964;Storr, 1964;Kitchener, 1972;Mead et al, 1985). Despite the longterm knowledge of the decline of the quokka on the mainland (White, 1952) and therefore the apparent need to investigate the causes, important ecological research has not proceeded.…”

Section: Introductionmentioning

confidence: 99%

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Local population structure of a naturally occurring metapopulation of the quokka (Setonix brachyurus Macropodidae: Marsupialia)

Hayward

Tores²,

Dillon³

et al. 2003

Biological Conservation

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We investigated the population structure of the quokka (Setonix brachyurus) on the mainland of Western Australia using markrecapture techniques. Seven previously known local populations and one unconfirmed site supporting the preferred, patchy and discrete, swampy habitat of the quokka were trapped. The quokka is now considered as locally extinct at three sites. The five remaining sites had extremely low numbers, ranging from 1 to 36 individuals. Population density at these sites ranged from 0.07 to 4.3 individuals per hectare. There has been no response to the on-going, 6 year fox control programme occurring in the region despite the quokkas' high fecundity and this is due to low recruitment levels. The remaining quokka populations in the northern jarrah forest appear to be the terminal remnants of a collapsing metapopulation. #

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