Evidence of effects of endemic chytridiomycosis on host survival, behavior, and emigration: reply to Schmidt
Murray, Kris A., Skerratt, Lee F., Speare, Rick, and McCallum, Hamish (2010) Evidence of effects of endemic chytridiomycosis on host survival, behavior, and emigration: reply to Schmidt. Conservation Biology, 24 (3). pp. 900-902.
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[Extract] In our recent publication (Murray et al. 2009), we documented a marked disease-associated reduction in apparent survival of threatened frogs infected with the pathogen Batrachochytrium dendrobatidis (Bd), despite a long period since its invasion. This result raises concern for hundreds of species of amphibians globally because it demonstrates that endemic chytridiomycosis can remain virulent for long periods, potentially placing ongoing pressure on amphibian populations that may elevate extinction risk.
In response, Schmidt claims "the apparent monthly survival estimates of Murray et al. are likely confounded with permanent emigration from the study site… . If infected and uninfected frogs have different emigration probabilities, then one would obtain different apparent survival estimates from the mark-recapture analysis for Bd-positive and Bd-negative frogs." Schmidt concludes, "I believe that most of the difference [in survival rate between infected and uninfected animals] is caused by permanent emigration from the study site."
|Item Type:||Article (Commentary)|
|FoR Codes:||07 AGRICULTURAL AND VETERINARY SCIENCES > 0707 Veterinary Sciences > 070704 Veterinary Epidemiology @ 100%|
|SEO Codes:||96 ENVIRONMENT > 9604 Control of Pests, Diseases and Exotic Species > 960499 Control of Pests, Diseases and Exotic Species not elsewhere classified @ 100%|
|Deposited On:||30 May 2011 12:49|
|Last Modified:||18 Oct 2013 01:17|
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