Dados do Trabalho

Título

Primate composition and distribution in the Tarauacá Basin in Southwestern Amazonia

Corpo do texto

Although the Amazonia is known to harbor the highest number of primates in the world, there is still limited information on the local composition and distribution of primates of many areas, particularly those in remote regions. This study provide data on the composition and distribution of primates inhabiting the low Tarauacá River, a tributary of the right bank of the Juruá River. On a daily basis, we surveyed seven trails in the varzea forest and three trails in the terra-firme forest for primates from March to April, 2023. The varzea trails were surveyed from canoes, while the terra-firme trails were surveyed on foot. We used the Principal Coordinate Analysis to assess differences in primate assemblages between habitats and river banks. We obtained 207 primate records from 13 species, distributed across 11 genera and 4 families. The species most frequently recorded in the area was [Saimiri boliviensis] (N=54 records), [Cebus unicolor] (N=35), [Leontocebus melanoleucus] (N=23), [Pithecia irrorata] (N=22), [Tamarinus subgrisescens] (N=17), [Sapajus apella] (N=15), [Pithecia vanzolinii ](N=14), and [Alouatta juara] (N=11). [Ateles chamek], [Cacajao amuna], [Ca. novaesi], [Plecturocebus cupreus], and [Tamarinus pilleatus] were also recorded in the area, but each had less than 10 records. Differences in primate composition were observed between habitats and river banks. Primate assemblages between terra-firme and varzea forests were found to be distinct. [Leontocebus melanoleucus], [P. vanzolinii], and [T. subgrisescens] were exclusively found in the terra-firme forests on the western (left) bank of the river, while [Ca. amuna], [Pi. irrorata], and [T. pilleatus] were exclusively found in varzea forests on the eastern (right) bank. The distribution of both [Cacajao] and [Pithecia] is split by the Tarauacá River. Additional surveys are necessary in this region to assess the local ecological factors that contribute to the presence of these primates.

Financiadores

Le Fonds National de la Recherche Scientifique; European Union’s Horizon 2020 Research and Innovation Programme; International Primatological Society; Rufford Foundation; Margot Marsh Biodiversity Foundation; Primate Conservation Inc.; Ministério da Ciência, Tecnologia e Inovação

Palavras-chave

Primate assemblage; Habitat partitioning; Remote areas; Survey