Fecha de Publicación: 24 Apr 2018
Cita: José F. González-Maya, Diego A. Gómez-Hoyos, Ivan Cruz-Lizano & Jan Schipper (2018): From hope to alert: demography of a remnant population of the Critically Endangered Atelopus varius from Costa Rica, Studies on Neotropical Fauna and Environment. 7pp.

From hope to alert: demography of a remnant population of the Critically Endangered Atelopus varius from Costa Rica

Dadas que las tasas de crecimiento poblacional se acercaron a cero, la población observada parece estar estable durante el estudio. Sin embargo, contrario a lo esperado para especies con reproducción estacional como A. varius, no encontramos un incremento en las tasas de reclutamiento.

STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT/ Taylor & Francis Group
DOI: 10.1080/01650521.2018.1460931

 

Harlequin frogs have suffered severe declines across the Neotropics. We present a population assessment for a recently discovered population of Atelopus varius from Costa Rica. Using mark-recapture methods from September 2011 to February 2013, we estimated survival and recruitments parameters using Cormack-Jolly-Seber models. We obtained 222 captures and estimated low recruitment rates and high seniority. Given estimates of population growth rates close to zero, the observed population seems to be stable during the study. However, contrary to expectations for seasonally reproducing species like A. varius, we did not find an increase in recruitment rates between dry and rainy season. We provide details on ongoing threats for the population, as well as propose conservation actions to mitigate these threats.

Articulo en linea, Taylor & Francis Group

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