As funções propostas para estas vocalizações podem ser divididas entre intragrupais e extragrupais. As características comuns que geralmente distinguem estas vocalizações são relacionadas com a transmissão de sons a longa distância.
Muitas pesquisas enfocaram tais vocalizações em uma única ou em poucas espécies, enquanto poucos estudos lidaram com padrões mais gerais dentro da ordem. Long calls Neotropics primates vocal communicationĬhamados de longo alcance são comuns em primatas. Future research must focus on larger trends in the evolution of primate long-distance calls, including the phylogeny of calling repertoires and the relationships between form and function in these signals. Considerable complexity and gradation exist in the long-distance call repertoires of some Neotropical primates, and female long-distance calls are probably more important in non-duetting species than usually thought. Examples of extragroup directed long-distance calls are the duets of titi monkeys and the roars and barks of howler monkeys.
Callitrichids present long-distance calls that are employed both in intragroup coordination and intergroup contests or spacing. Among Neotropical primates, several species perform long-distance calls that seem more related to intragroup coordination, markedly in atelines. Extragroup functions relate to mate defense, mate attraction or resource defense, while intragroup functions involve group coordination or alarm. The proposed functions of primate long-distance calls can be divided into extragroup and intragroup ones. The common features that usually characterize these vocalizations are related to long-distance propagation of sounds. Several studies concentrate on such calls in just one or in few species, while few studies have treated more general trends within the order.
Long-distance calls are widespread among primates.
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