Analise da comunicação sonora no anu-branco guira quira (aves: cuculidae), avaliações eco-etologicas e evolutivas

AUTOR(ES)
DATA DE PUBLICAÇÃO

1986

RESUMO

The vocal repertoire of the Guira Cuckoo Guira guira is described together with its behavioral contexts. The natural groups of Guiras that live at the Campus of the Universidade Estadual de Londrina in Paraná, Brazil, were studied. Important observations and recordings were also obtained from birds raised in captivity in the middle of the town and in the suburban rural area. The latter had special significance because of their effect as lures for the Guira visitors of the neighbourhoods. Recordings were made with a UHER-4000 tape recorder and a microfone on a parabolic reflector. The analyses were made on the basis of the sonagrams obtained and the related behavioral contexts observed. Nevertheless some limitations greatly restricted the interpretations of social behavior, as the observer couldnot follow the whole repro ductive cycle and was unable to recognize the sexes, and in general, the single individuaIs. Ecological sources of selection of vocalizations are discussed. Particularly, it is observed that Guira Cukoos use mainly temporal parameters to code their messages and call from high perches as expected from birds of open habitats. From the biotic point of view, the importance of the distance and the possibility for the receiver to localize the sound source have been discussed

ASSUNTO(S)

som produzido por animais ave - vocalização aves - comunicação

ACESSO AO ARTIGO

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