Composition and dynamics of Alouatta guariba clamitans Cabrera, groups (Primates, Atelidae) on an Araucaria Pine Forest remnant on Paraná State, Brazil

Species in the genus Alouatta Lacepede, 1799 are social, and their groups display considerable variation in their age and sex composition. Little is known about the social organization of groups of Alouatta guariba clamitans Cabrera, 1940. This study was carried out between February 2002 and June 2004 in the Chacara Payquere, located in the municipality of Balsa Nova in the state of Parana (Southern Brazil). The vegetation in this area is the Araucaria Pine Forest, and this reserve is located within the Area for Environmental Protection of the Devonian Scarp. During observations, groups were identified and their sex/age composition and dynamics were recorded. Six groups were observed over the course of three years. Average composition values were 6.33 individuals/group; 1.47 adult male (AM)/group; 0.46 subadult male/group; 2.2 adult females (AF)/group; 1.13 juvenile II/group; 0.8 juvenile I/group, and 0.27 infant/group. In order to describe the sex/age composition of this species, the data obtained in the present study were combined with information on 66 additional groups of A. g. clamitans available in the literature, totaling 72 groups. Ensemble values obtained for this species are 6.25 individuals/group; 1.39 AM/group; 2.26 AF/group and 2.62 immature individuals/group. With respect to the dynamics of the groups, the following data were recorded: 11 births, 25 age class changes, 4 solitary individuals, 1 death/disappearance, and the fission of one group into two. Therefore, the current study described the the sex/age composition of A. g. clamitans groups, as well as some aspects of their dynamics.

• Publication year

  2005

• Venue

  Revista Brasileira De Zoologia

• Publication date

  2005-03-01

• Fields of study

  Biology, Environmental Science

• Identifiers
  DOI 10.1590/S0101-81752005000100013
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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