A Preliminary Estimate of The Apennine Brown Bear Population Size Based on Hair-Snag Sampling and Multiple Data Source Mark–Recapture Huggins Models
作者： Vincenzo Gervasi , Paolo Ciucci , John Boulanger , Mario Posillico , Cinzia Sulli
DOI: 10.2192/07GR022.1
关键词: Population size 、 Population 、 Statistics 、 Sampling (statistics) 、 Geography 、 National park 、 Akaike information criterion 、 Mark and recapture 、 Snag 、 Demography 、 Ursus
摘要: Abstract Although the brown bear (Ursus arctos) population in Abruzzo (central Apennines, Italy) suffered high mortality during past 30 years and is potentially at risk of extinction, no formal estimate its abundance has been attempted. In 2004, Italian Forest Service National Park applied DNA-based techniques to hair-snag samples from Apennine population. Even though sampling theoretical limitations prevented estimating size being objective these first applications, we extracted most could out 2004 data produce size. To overcome strategies (systematic grid, opportunistic buckthorn [Rhamnus alpina] patches, incidental other field activities), used a multiple data-source approach Huggins closed models implemented program MARK. account for model uncertainty, averaged plausible using Akaike weights estimated an...
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