Mating-Call Sound Intensities of Anuran Amphibians

Abstract

Mating-call intensities of five species of Australian anuran amphibians were measured under natural conditions. The sound-intensity values were consistent within species, and ranged from 88 dB for Crinia parinsignifera to 103 dB for Limnodynastes tasmaniensis (0 dB re 0.0002 dyn/cm2) at a distance of 50 cm. On the basis of published hearing threshold data, the maximal effective propagation distances were estimated for Crinia parinsignifera and Hyla ewingi; these were 4 m and 100 m, respectively.