A critique of density estimation from cameratrap data

Foster, Rebecca J. and Harmsen, Bart J. (2012) A critique of density estimation from cameratrap data. in Journal of Wildlife Management, 76 (2). pp. 224-236.

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    Densities of elusive terrestrial mammals are commonly estimated from camera-trap data. Typically, this is a 2-step process involving 1) fitting conventional closed population capture–recapture models to estimate abundance, and 2) using ad hoc methods to determine the effective trapping area. The methodology needs to be accurate, robust, and reliable when results are used to guide wildlife management. We critically review 47 published studies and discuss the problems associated with contemporary population estimates of elusive species from camera-trap data. In particular we discuss 1) individual identification, 2) sample size and capture probability, 3) camera location and spacing, 4) the size of the study area, and 5) ad hoc density estimation from the calculation of an effective trapping area. We also discuss the recently developed spatially explicit capture–recapture (SECR) models as an alternative approach that does not require the intermediate step of estimating an effective trapping area. We recommend 1) greater transparency in study design and quality of the data, 2) greater rigor when reviewing manuscripts, and 3) that more attention is given to the survey design to ensure data are of sufficient quality for analysis.� 2011 The Wildlife Society

    Item Type: Peer-reviewed Journal Article
    Related URLs:
    Unique ID or DOI: 10.1002/jwmg.275
    Publisher: Research Gate
    Keywords: abundance estimation, camera trap, capture–recapture, closed population model, density estimation.
    Subjects: (A) Biodiversity > (AG) Mammals > (AGB) Carnivores
    (Z) Other or Unspecified
    Publication Sources: (1) Environmental Research Institute
    Date Deposited: 28 Oct 2017 21:57
    Last Modified: 28 Oct 2017 21:57
    URI: http://eprints.uberibz.org/id/eprint/1633

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