A multi-faceted approach to evaluating the detection probability of an elusive snake (Sistrurus catenatus)

Abstract

Many rare and elusive species have low detection probabilities, thereby imposing unique challenges to monitoring and conservation. Here, we assess the detection probability of the Eastern Massasauga (Sistrurus catenatus) in contrast to a more common and conspicuous species, the Eastern Gartersnake (Thamnophis sirtalis). We found that patterns of detection probability differed between species, wherein S. catenatus was detected less often and under a more specific set of sampling conditions. Correspondingly, detection trials with S. catenatus found a high non-detection rate, while detection trials with artificial models suggest that regional differences in detection probability are driven by variation in population density and habitat use. Our results suggest that current monitoring efforts are not sufficient, and that S. catenatus is frequently undetected. Accordingly, we highlight the importance of species-specific monitoring protocols when monitoring rare and elusive species, and recommend a multi-faceted approach that estimates detection probability and identifies species-specific challenges to monitoring.

Author Keywords: detection probability, elusive species, monitoring programs, non-detection, S. catenatus, snakes

    Item Description
    Type
    Contributors
    Creator (cre): Hudson, Sean
    Thesis advisor (ths): Murray, Dennis
    Degree committee member (dgc): Davy, Christina
    Degree committee member (dgc): Beresford, David
    Degree granting institution (dgg): Trent University
    Date Issued
    2019
    Date (Unspecified)
    2019
    Place Published
    Peterborough, ON
    Language
    Extent
    60 pages
    Rights
    Copyright is held by the author, with all rights reserved, unless otherwise noted.
    Subject (Topical)
    Local Identifier
    TC-OPET-10720
    Publisher
    Trent University
    Degree
    Master of Science (M.Sc.): Environmental and Life Sciences