Comparative efficacy of sign surveys, spotlighting and audio playbacks in a landscape-scale carnivore survey
MetadataShow full item record
Many carnivores are difficult and labour-intensive to detect, often leading to prohibitivelyhigh effort and cost in large-scale surveys.However,such studies provide information that isimportant for effective management and conservation. Here, we evaluate the suitability ofthree survey methods for landscape-scale multi-species monitoring. We compare signsurveys, spotlighting, and audio playbacks in terms of detection efficiency, precision, effort,and cost. Sign surveys out-performed the other methods in all comparison criteria, althoughsupplementary methods were needed for some species and sites. We found that usingestablished analysis techniques, robust landscape-scale abundance estimates wouldrequire unrealistically high effort and cost. Occupancy estimation required considerablylower sample sizes and was therefore more economical. We conclude that sign-basedoccupancy estimates constitute a versatile and efficient option for future large-scale,multi-species carnivore surveys.
Showing items related by title, author, creator and subject.
Brown hyaenas on roads: Estimating carnivore occupancy and abundance using spatially auto-correlated sign survey replicatesThorn, M.; Green, M.; Bateman, Bill; Waite, S.; Scott, D. (2011)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 ...
Large-scale distribution patterns of carnivores in northern South Africa: implications for conservation and monitoringThorn, M.; Green, M.; Keith, M.; Marnewick, K.; Bateman, Bill; Cameron, E.; Scott, D. (2011)Accurate assessment of carnivore population status is frequently hindered by insufficient distribution data. For northern South Africa we address this deficit by mapping new records from landscape-scale sign surveys, ...
The effect of landscape composition and configuration on the spatial distribution of temperate demersal fishMoore, Cordelia; Van Niel, K.; Harvey, Euan (2011)In contrast to the terrestrial environment, where the use of landscape analyses has been clearly demonstrated, the influence of landscape composition and configuration on the abundance and spatial distribution of marine ...