NOVAS INFORMAÇÕES SOBRE A DISTRIBUIÇÃO DE <i>CACAJAO CALVUS</i> NA RESERVA DE DESENVOLVIMENTO SUSTENTÁVEL MAMIRAUÁ

Abstract

Populations of two forms of uacaries, red and white, are found at the Mamirauá Sustainable Development Reserve (MSDR). Ayres (1986) notes that two skins of red uacaries were brought to Tefé (Amazonas state) from Auati-Paraná area, northern bank of Solimões river, inside the known geographical distribution of white uacaries, suggesting that a zone of contact between these two forms. The objective of this study was to gather information on the distribution of C. calvus at MSDR, both with interviews and direct observation. Parallel transects for active search were made at sites indicated by the inhabitants of the local communities. Nine communities confirmed the presence of white uacaries, while red uacaries were confirmed at seven communities. A small area of complete absence of the species was reported between Auati-paraná channel and Japurá river. A zone of contact between the two forms was indicated at Paraná do Aiupiá. For direct observation of the animals, 82.5 km were covered along Aiupiá channel, where white uacaries were observed in seven occasions, all at the right bank. Red uacaries were also spoted seven times, at the left bank. Further investigations at this area are being conducted in order to define the peripatry of both taxa, with big consequences to the conservation of the species.