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Demographic sensitivity and persistence of the threatened white- and orange-bellied frogs of Western Australia

Conroy, S. D. S. and Brook, Barry W. (2003). Demographic sensitivity and persistence of the threatened white- and orange-bellied frogs of Western Australia. Population Ecology,45(2):105-114.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 28 times in Scopus Article | Citations

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Title Demographic sensitivity and persistence of the threatened white- and orange-bellied frogs of Western Australia
Author Conroy, S. D. S.
Brook, Barry W.
Journal Name Population Ecology
Publication Date 2003
Volume Number 45
Issue Number 2
ISSN 1438-3896   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-0345393798
Start Page 105
End Page 114
Total Pages 10
Place of Publication Tokyo
Publisher Springer
HERDC Category C1 - Journal Article (DEST)
Abstract Anurans have been the subject of numerous experimental and monitoring studies, yet their autecology under natural conditions remains poorly understood. Previous work has focussed on the pre-metamorphic life stages, with data suitable for estimating demographic parameters for all life stages collected in few species. This deficiency has almost certainly confounded current views of amphibian autecology and understanding of which mechanisms of decline represent the greatest threats to the persistence of amphibian species. We used a stage-structured metapopulation model, parameterised with comprehensive field data, to explore the sensitivity of two species of myobatrachid frogs from the southwest of Australia, Geocrinia alba and G. vitellina, to changes in demographic parameters at all life stages. The simulation modelling indicated that the population dynamics of both species were consistently most sensitive to changes in juvenile survival, then to fecundity, and third to both adult survival and standard deviation of survival to about equal extent. In practical terms, this indicates that management interventions which attempt to mitigate reductions in juvenile survival are likely to be most successful in arresting anuran metapopulation declines.
Keywords amphibia
geocrinia
juvenile survival
metapopulation model
population viability
sensitivity analysis
population viability analysis
amphibian populations
rana-sylvatica
life-history
wood frog
declines
fluctuations
extinction
anura
strategies
DOI http://dx.doi.org/10.1007/s10144-003-0145-9   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Wed, 28 Nov 2007, 14:16:08 CST