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Measuring Conservation Trade-offs: Demographic Models Provide Critical Context to Empirical Studies

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Author(s): Anna M. Calvert | Philip D. Taylor

Journal: Avian Conservation and Ecology
ISSN 1712-6568

Volume: 6;
Issue: 2;
Start page: 2;
Date: 2011;
Original page

Keywords: endangered species | projection model | growth rate | shorebird | vital rate

ABSTRACT
The decline of Piping Plover (Charadrius melodus) populations in North America (Haig et al. 2005) has triggered conservation concern throughout their range and active intervention at their breeding grounds. Protection of nests from both natural and human disturbance has been a particular focus of many regional conservation efforts, such as the predator exclusion methods applied in Prince Edward Island National Park (PEINP) as described in Barber et al. (2010). We applaud Barber et al.’s direct quantifications of the effect of specific conservation actions, given that demographic data for endangered species are rare and often imprecise (Heppell et al. 2000). Our purpose here is to incorporate their data into a previously published population model for the species, to maximize the value of these data for Piping Plover conservation in the region.
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