Effects of chlorpyrifos on the sound emitted by tadpoles of Ceratophrys ornata (Anura: Ceratophryidae)

SALGADO COSTA C.; TRUDEAU V. L.; RONCO A.E.; NATALE G.S.

Chascomús

Jornada; XVI Jornadas Anuales de la Sociedad Argentina de Biología; 2014

Sociedad Argentina de Biología

The emission of underwater sounds in anuran tadpoles has been documented in only two species from Argentina and one from Madagascar. The aim of the study was to evaluate sublethal effects of the active compound chlorpyrifos (CPF) on the sound emitted by tadpoles of C. ornata and its bioacoustic variables in two developmental stages of Gosner (31 and 37). Toxicity tests were performed from 0.01 to 0.7 mgCPF/L, with one larvae per chamber and 20 replicates. Audio recordings were digitalized and analyzed using Adobe Audition 1. Analyzed variables were: duration of the sound (s), number of pulses and interpulses, dominant frequency (Hz). Results showed significant differences (p