Title
Faecal DNA-based methods for monitoring wildlife populations: opportunities and challenges
Author(s)
Hedges, S.
Published
2015
Publisher
Cambodian Journal of Natural History
Abstract
Faecal DNA-based monitoring methods (especially capture–mark–recapture methods) can provide more precise abundance estimates, and more data about population structure and dynamics, than conventional methods such as dung density-based methods or sighting-based methods. Faecal DNA-based capture–mark–recapture methods typically also require less time in the fi eld and can be used when dung density or other methods are impracticable. In addition, as the laboratory costs associated with faecal DNA-based methods have fallen, these methods are now often cheaper than conventional labour- and/or time-intensive methods. Nevertheless, a number of challenges remain, including: the limited number of laboratories able to conduct the work required to a high standard; restrictions on sample exports that further limit the number of available laboratories; the difficulty of predicting the number of samples required, which affects both sample design and budget predictions; appropriate sample preservation/storage; and how to maximise sample quality in the field. Fortunately, a number of recent developments are reducing the significance of some of these challenges: these developments are reviewed and the remaining issues are discussed as an aide to selecting the most appropriate monitoring methods for elusive species in challenging environments.

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PUB15528