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Cryptic disease-induced mortality may cause host extinction in an apparently stable host-parasite system.
Valenzuela-Sánchez, Andrés; Schmidt, Benedikt R; Uribe-Rivera, David E; Costas, Francisco; Cunningham, Andrew A; Soto-Azat, Claudio.
Afiliação
  • Valenzuela-Sánchez A; Centro de Investigación para la Sustentabilidad, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, República 440, Santiago, Chile andresvalenzuela.zoo@gmail.com.
  • Schmidt BR; ONG Ranita de Darwin, Nataniel Cox 152, Santiago, Chile.
  • Uribe-Rivera DE; Institute of Zoology, Zoological Society of London, Regent's Park, London NW1 4RY, UK.
  • Costas F; Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
  • Cunningham AA; Info Fauna KARCH, Passage Maximilien-de-Meuron 6, 2000 Neuchâtel, Switzerland.
  • Soto-Azat C; ONG Ranita de Darwin, Nataniel Cox 152, Santiago, Chile.
Proc Biol Sci ; 284(1863)2017 Sep 27.
Article em En | MEDLINE | ID: mdl-28954907
The decline of wildlife populations due to emerging infectious disease often shows a common pattern: the parasite invades a naive host population, producing epidemic disease and a population decline, sometimes with extirpation. Some susceptible host populations can survive the epidemic phase and persist with endemic parasitic infection. Understanding host-parasite dynamics leading to persistence of the system is imperative to adequately inform conservation practice. Here we combine field data, statistical and mathematical modelling to explore the dynamics of the apparently stable Rhinoderma darwinii-Batrachochytrium dendrobatidis (Bd) system. Our results indicate that Bd-induced population extirpation may occur even in the absence of epidemics and where parasite prevalence is relatively low. These empirical findings are consistent with previous theoretical predictions showing that highly pathogenic parasites are able to regulate host populations even at extremely low prevalence, highlighting that disease threats should be investigated as a cause of population declines even in the absence of an overt increase in mortality.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Anuros / Quitridiomicetos / Extinção Biológica / Interações Hospedeiro-Parasita / Modelos Biológicos Tipo de estudo: Prognostic_studies / Risk_factors_studies Limite: Animals Idioma: En Revista: Proc Biol Sci Assunto da revista: BIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Chile País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Anuros / Quitridiomicetos / Extinção Biológica / Interações Hospedeiro-Parasita / Modelos Biológicos Tipo de estudo: Prognostic_studies / Risk_factors_studies Limite: Animals Idioma: En Revista: Proc Biol Sci Assunto da revista: BIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Chile País de publicação: Reino Unido