DIFERENÇAS NOS PARÂMETROS ACÚSTICOS DAS VOCALIZAÇÕES DE ALARME DAS ESPÉCIES DE Saimiri VOIGT, 1831 (PRIMATES, CEBIDAE NA FLORESTA DE VÁRZEA – RESERVA MAMIRAUÁ.

Abstract

Animal vocal communication is a species specific trait, and can be considered as a tool for taxonomic studies. This study aimed to analyses and compare acoustic parameters of alarm calls of Saimiri species found at Mamiraua Sustainable Development Reserve (MSDR). Observers waited for members of social groups of Saimiri vanzolinii , Saimiri sciureus macrodon and Saimiri sciureus cassiquiarensis at randomly chosen site inside their distribution. Vocalizations were collected with a digital recorder and a directional microphone. Three syllables were selected from the calls of each Saimiri. The final and maximum frequencies of these calls, as well as their duration, were recorded. Frequencies were compared with a Kruskal-Wallis test. The duration of the calls were compared in s one-criteria ANOVA. Significative differences were found only among maximum frequencies of the cackles. Median of maximum frequencies in the calls of S. s. cassiquiarensis > S. s. macrodon > Saimiri vanzolinii . The maximum frequencies of cackles from animals at one bank were different from those of the opposite bank. It is suggested that the differences found can be one of the possible causes for the ecological separation among Saimiri taxa at MSDR, since probably there is not conspecific recognition.