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Estimated muntjac densities from distance sampling were of similar magnitude to estimates from drive counts. Over 2008-2010, we observed 1926 muntjac and 921 roe groups; allowing robust abundance estimation and habitat-specific analysis. ESWs in open habitat were 31% and 27% greater than in mature and 45% and 46% greater than in dense habitat, for roe and muntjac respectively. Although differences in densities among model designs were not large, ignoring block or habitat effects gave higher estimates, while models that accounted for habitat-specific detectability gave lower (-8%) and more precise (38% reduction in CV) estimates (n = 3, muntjac: 5.3-7.5% CV; roe deer: 8.8-12.6% CV). The similarity of density estimates between ungrouped and grouped data and analysis of behaviour of detected deer support the conclusion that distance estimates were not biased by avoidance.
We conclude that distance sampling using thermal imaging is a robust and powerful method for estimating deer density. In heterogeneous forest density estimates will be improved by accounting for varying detectability among growth stages or habitats.
- Thermal imaging
- Distance sampling
- Abundance estimation
- Capreolus capreolus
- Evidence-based management
- Muntiacus reevesi
- 1 Finished
- 9 Citations (Scopus)
- 12 Article
Habitat quality, configuration and context effects on roe deer fecundity across a forested landscape mosaicZini, V., Waeber, K. & Dolman, P., 27 Dec 2019, In: PLoS One. 14, 12, e0226666.
Research output: Contribution to journal › Article › peer-reviewOpen AccessFile4 Citations (Scopus)12 Downloads (Pure)
Dolman, P., Jan 2014, In: Ibis. 156, 1, p. 116-131
Research output: Contribution to journal › Article › peer-review13 Citations (Scopus)
Achieving landscape-scale deer management for biodiversity conservation: The need to consider sources and sinksWaeber, K., Spencer, J. & Dolman, P. M., 1 May 2013, In: Journal of Wildlife Management. 77, 4, p. 726-736 11 p.
Research output: Contribution to journal › Article › peer-reviewFile24 Citations (Scopus)6 Downloads (Pure)