Vocal signals in a tropical avain species, the redvented bulbul Pycnonotus cafer: their characteristics and importance.
J Biosci
;
2000 Dec; 25(4): 387-96
Artigo
em Inglês
| IMSEAR
| ID: sea-110720
ABSTRACT
Acoustic signals play an important role in the lives of birds. Almost all avian species produce vocal signals in a variety of contexts either in the form of calls or songs or both. In the present study different types of vocal signals of the tropical avian species Pycnonotus cafer were characterized on the basis of their physical characteristics and context of production. This species used six types of vocal signals contact signals, roosting signals, alarm signals, twittering signals, distress signals and begging signals. Two types of alarm signals are produced based on predation pressure. These signals are dissimilar in all physical characteristics except for dominant frequency. Although alarm signal type I and roosting signals are phonetically similar, they have completely different sonogram characteristics.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Som
/
Fatores de Tempo
/
Vocalização Animal
/
Aves Canoras
/
Animais
Idioma:
Inglês
Revista:
J Biosci
Ano de publicação:
2000
Tipo de documento:
Artigo
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