Decline of a Tropical Montane Amphibian Fauna

  title={Decline of a Tropical Montane Amphibian Fauna},
  author={Karen R. Lips},
  journal={Conservation Biology},
  • K. Lips
  • Published 1 February 1998
  • Environmental Science
  • Conservation Biology
On the basis of surveys conducted between 1991 and 1996, I report a decline of the amphibian fauna at Las Tablas, Puntarenas Province, Costa Rica. I propose that the reduction in the abundance of Atelopus chiriquiensis and Hyla calypsa, the presence of dead and dying individuals of six species of frogs and salamanders, and changes in population sex ratios of A. chiriquiensis and H. calypsa are evidence for “atypical” population fluctuations. Species with both aquatic eggs and aquatic larvae… 
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