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.

Terrestrial Activity in Pitheciins (Cacajao,Chiropotes, andPithecia)

“…Similarly, João Valsecchi and Nayara Cardoso have surveyed both C. c. calvus and C. c. rubicundus extensively in Mamirauá and neighboring areas since 2001 [e.g. Vieira et al, ], and have never observed terrestrial behavior, although most of these surveys were conducted during high water, and on unhabituated animals.…”

Molecular phylogeny and systematics of bald uakaris, genus Cacajao (Primates: Pitheciidae), with the description of a new species

“…Indeed, a contact zone between C. c. calvus and C. c. rubicundus was reported in the Aiupiá channel, a south bank tributary of the Auati-Paraná (Vieira et al, 2008), but unfortunately, we did not get any samples from this area to include in the ddRADseq analysis to investigate gene flow between C. calvus and C. rubicundus. The only C. rubicundus sequences from Auati-Paraná channel were retrieved from GenBank (FJ531652 and FJ531653; see also Figueiredo-Ready et al, 2013) and were used in our cytochrome b tree.…”

Impact of Quaternary Amazonian river dynamics on the diversification of uakari monkeys (genus Cacajao)

“…Furthermore, they are separated by rivers that act as barriers to their dispersion, such as the Tarauacá River for C. novaesi and C. amuna and the Jutaí River for C. rubicundus and C. calvus (Silva et al., 2021). In the case of C. rubicundus and C. calvus , a contact zone was reported in the Auati‐Paraná channel (Vieira et al., 2008), with mixed groups occurring in a narrow area. The role of the Jutaí and Tarauacá rivers as barriers for their dispersal and potential interspecific competition may be critical factors in maintaining the separation between these species.…”

“…Furthermore, they are separated by rivers that act as barriers to their dispersion, such as the Tarauacá River for C. novaesi and C. amuna and the Jutaí River for C. rubicundus and C. calvus (Silva et al, 2021). In the case of C. rubicundus and C. calvus, a contact zone was reported in the Auati-Paraná channel (Vieira et al, 2008), with mixed groups occurring in a narrow area.…”