Population estimation and trappability of the European badger (Meles meles): implications for tuberculosis management
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|Title:||Population estimation and trappability of the European badger (Meles meles): implications for tuberculosis management||Authors:||Byrne, Andrew W.
Corner, L. A. (Leigh Austin)
|Permanent link:||http://hdl.handle.net/10197/5252||Date:||5-Dec-2012||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-Guérin) 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 kmˉ², 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.||Type of material:||Journal Article||Publisher:||Public Library of Science||Copyright (published version):||2012 Byrne et al.||Keywords:||Badger;Mark-recapture;Trappability||DOI:||10.1371/journal.pone.0050807||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Veterinary Medicine Research Collection|
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