Comparative efficacy of sign surveys, spotlighting and audio playbacks in a landscape-scale carnivore survey

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Thorn, M ; Green, M ; Bateman, PW ; Cameron, EZ ; Yarnell, RW ; Scott, DM (2010)
  • Publisher: South African Bureau for Scientific Publications

Many carnivores are difficult and labour-intensive to detect, often leading to prohibitively high effort and cost in large-scale surveys. However, such studies provide information that is important for effective management and conservation. Here, we evaluate the suitability of three survey methods for landscape-scale multi-species monitoring. We compare sign surveys, spotlighting, and audio playbacks in terms of detection efficiency, precision, effort, and cost. Sign surveys out-performed the other methods in all comparison criteria, although supplementary methods were needed for some species and sites. We found that using established analysis techniques, robust landscape-scale abundance estimates would require unrealistically high effort and cost. Occupancy estimation required considerably lower sample sizes and was therefore more economical. We conclude that sign-based occupancy estimates constitute a versatile and efficient option for future large-scale, multi-species carnivore surveys.
  • References (51)
    51 references, page 1 of 6

    BALDWIN, R.A. & BENDER, L.C. 2008. Distribution, occupancy, and habitat correlates of American martens (Martes americana) in Rocky Mountain National Park, Colorado. J. Mammal. 89: 419-427.

    BALME, G.A., HUNTER, L.T.B. & SLOTOW, R. 2009. Evaluating methods for counting cryptic carnivores. J. Wildl. Manage. 73: 433-441.

    BAREA-AZCON, J.M., VIRGOS, E., BALLESTEROSDUPERON, E., MOLEON, M. & CHIROSA, M. 2007. Surveying carnivores at large spatial scales: a comparison of four broad-applied methods. Biodiversity Conserv. 16: 1213-1230.

    BOULANGER, J., WHITE, G.C., PROCTOR, M., STENHOUSE, G., MACHUTCHON, G. & HIMMER, S. 2008. Use of occupancy models to estimate the influence of previous live captures on DNA-based detection probabilities of grizzly bears. J. Wildl. Manage. 72: 589-595.

    BUCKLAND, S.T., ANDERSON, D.R., BURNHAM, K.P. & LAAKE, J.L. 1993. Distance sampling: estimating abundance of biological populations. Chapman and Hall, London.

    BURGENER, N. & GUSSET, M. 2003. The feeding habits of brown hyaenas (Hyaena brunnea) on a game ranch in Limpopo Province, South Africa. Afr. Zool. 38: 181-184.

    CARBONE, C., MADDOX, T., FUNSTON, P.J., MILLS, M.G.L., GRETHER, G.F. & VAN VALKENBURGH, B. 2009. Parallels between playbacks and Pleistocene tar seeps suggest sociality in an extinct sabretooth cat, Smilodon. Biol. Lett. 5(1): 81-85.

    CREEL, S. & CREEL, N.M. 1996. Limitation of African wild dogs by competition with larger carnivores. Conserv. Biol. 10: 526-538.

    DE VILLIERS, B. & MANGOLD, S. 2002. The biophysical environment. In: D. Walmsley, J. Walmsley, S. Mangold & M. Kalule-Sabiti (Eds), North West Province state of the environment report. Directorate of Environment and Conservation Management, North West Department of Agriculture, Conservation and Environment, Mmabatho.

    DUCKWORTH, J.W. 1992. Sighting frequencies of nocturnal mammals in an Ethopian Rift Valley National Park. Afr. J. Ecol. 30: 90-97.

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