Vocal sequential exchanges and intragroup spacing in the Northern Muriqui Brachyteles arachnoides hypoxanthus

Anais da Academia Brasileira de Ciências

Francisco D.c. Mendes²  César Ades¹ 

[1] ,Universidade Católica de Goiás Instituto do Trópico Subúmido Departamento de PsicologiaGoiânia GO ,Brasil

关键词: animal communication;    signal exchange;    vocal sequences;    intragroup spacing;    Muriqui;    comunicação animal;    intercâmbio de sinais;    seqüências vocais;    espaçamento intragrupal;    muriqui;   

DOI  :  10.1590/S0001-37652004000200032

来源: SciELO

【 摘 要 】

Sequential exchanges of vocalizations (staccatos and neighs) emitted by Northern Muriquis Brachyteles arachnoides hypoxanthus were recorded at the Biological Station of Caratinga, Minas Gerais State, Brazil. Staccatos and neighs containing larger proportion of short elements were preferentially produced during short-range exchanges; neighs, produced by a larger number of participants, were typical of long-range exchanges. Staccatos emitted by animals feeding in a dispersed manner contained a larger proportion of tonal elements than those emitted by muriquis feeding in a cohesive manner. Sequential exchanges seem thus to be constituted by two inter-related subsystems of calls that aid muriquis to coordinate intragroup spacing, despite the poor visibility of the habitat.

【 授权许可】

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