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Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/386

Title: Population Estimation and Trappability of the European Badger (Meles meles): Implications for Tuberculosis Management.
Authors: Byrne, Andrew W.
O'Keeffe, James
Green, Stuart
Sleeman, D. Paddy
Corner, Leigh A. L.
Gormley, Eamonn
Murphy, Denise
Martin, S. Wayne
Davenport, John
Keywords: Mark-recapture data
European Badger (Meles meles)
Population estimation
Wildlife vaccination
Issue Date: 5-Nov-2012
Publisher: PLOS
Citation: Byrne AW, O’Keeffe J, Green S, Sleeman DP, Corner LAL, et al. (2012) Population Estimation and Trappability of the European Badger (Meles meles): Implications for Tuberculosis Management. PLoS ONE 7(12): e50807. doi:10.1371/journal.pone.0050807
Series/Report no.: PLoS One;vol 7
Abstract: Estimates of population size and trappability inform vaccine efficacy modelling and are required for adaptive management during prolonged wildlife vaccination campaigns. We present an analysis of mark-recapture data from a badger vaccine (Bacille Calmette–Gue´ rin) study in Ireland. This study is the largest scale (755 km2) mark-recapture study ever undertaken with this species. The study area was divided into three approximately equal–sized zones, each with similar survey and capture effort. A mean badger population size of 671 (SD: 76) was estimated using a closed-subpopulation model (CSpM) based on data from capturing sessions of the entire area and was consistent with a separate multiplicative model. Minimum number alive estimates calculated from the same data were on average 49–51% smaller than the CSpM estimates, but these are considered severely negatively biased when trappability is low. Population densities derived from the CSpM estimates were 0.82–1.06 badgers km22, and broadly consistent with previous reports for an adjacent area. Mean trappability was estimated to be 34–35% per session across the population. By the fifth capture session, 79% of the adult badgers caught had been marked previously. Multivariable modelling suggested significant differences in badger trappability depending on zone, season and age-class. There were more putatively trap-wary badgers identified in the population than trap-happy badgers, but wariness was not related to individual’s sex, zone or season of capture. Live-trapping efficacy can vary significantly amongst sites, seasons, age, or personality, hence monitoring of trappability is recommended as part of an adaptive management regime during large–scale wildlife vaccination programs to counter biases and to improve efficiencies.
Description: peer-reviewed
URI: http://hdl.handle.net/11019/386
ISSN: 1932-6203
Appears in Collections:Spatial Analysis

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