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dc.contributor.authorThorn, M.
dc.contributor.authorGreen, M.
dc.contributor.authorBateman, Bill
dc.contributor.authorWaite, S.
dc.contributor.authorScott, D.
dc.date.accessioned2017-01-30T12:10:46Z
dc.date.available2017-01-30T12:10:46Z
dc.date.created2014-11-19T01:13:39Z
dc.date.issued2011
dc.identifier.citationThorn, M. and Green, M. and Bateman, B. and Waite, S. and Scott, D. 2011. Brown hyaenas on roads: Estimating carnivore occupancy and abundance using spatially auto-correlated sign survey replicates. Biological Conservation. 144 (6): pp. 1799-1807.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/18932
dc.description.abstract

Carnivore survey protocols that properly address spatial sampling and detectability issues are seldom feasible at a landscape-scale. This limits knowledge of large-scale patterns in distribution, abundance and their underlying determinants, hindering conservation of globally threatened carnivore populations. Occupancy analysis of data from logistically efficient sign surveys along consecutive road segments (spatially auto-correlated replicates) offers a potential solution. We adapted and applied this newly-developed method over 62,979 km2 of human-modified land in South Africa. Our aims were to (1) generate unbiased estimates of brown hyaena occupancy and abundance (2) investigate two suspected determinants of occupancy using a combination of biological and socio-economic sampling techniques, and (3) use simulations to evaluate the effort required for abundance and occupancy estimates with acceptable bias, precision and power. Brown hyaena occupancy was estimated at 0.748 (±SE 0.1), and estimated overall density in agricultural land (0.15/100 km2, ±SE 0.08) was an order of magnitude lower than in protected areas. Positive attitudes to carnivores and presence of wildlife farms exerted strong positive effects on occupancy, so changes in these factors may well exert monotonic impacts on local metapopulation status. Producing reliable occupancy and abundance estimates would require ?6 replicates and ?12 replicates per site respectively. Detecting 50% and 30% declines in brown hyaena occupancy with adequate power would require five annual surveys at ?65 sites and ?125 sites respectively. Our results suggest that protocols based on spatially auto-correlated sign survey replicates could be used to monitor carnivore populations at large, and possibly even country-wide spatial scales.

dc.publisherElsevier
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S0006320711001030
dc.subjectWildlife monitoring
dc.subjectInterview
dc.subjectDetection probability
dc.subjectSouth Africa
dc.subjectAttitude
dc.subjectHyaena brunnea
dc.titleBrown hyaenas on roads: Estimating carnivore occupancy and abundance using spatially auto-correlated sign survey replicates
dc.typeJournal Article
dcterms.source.volume144
dcterms.source.number6
dcterms.source.startPage1799
dcterms.source.endPage1807
dcterms.source.issn00063207
dcterms.source.titleBiological Conservation
curtin.accessStatusFulltext not available


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