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Vocalizations of Amazon river dolphins (Inia geoffrensis) : Characterization, effect of physical environment and differences between populations
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Orientador(es)
Resumo(s)
The vocal repertoire of the Amazon river dolphin and its geographic variations are still poorly
known, especially in relation to ecological variables. Here the acoustic characteristics of low frequency
pulsed vocalizations, with single or multiple pulses, recorded in two protected areas of the
Amazon were described and differences in acoustic emissions related to water properties were analyzed.
Both frequency and time parameters differ relative to abiotic condition of water turbidity.
Changes in the animals’ acoustic behavior might be due to differences in sound propagation
between rich-sediment water and clear water. Geographic variation was found in frequency and
time parameters, requiring further investigation.
Descrição
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Contexto Educativo
Citação
Journal of the Acoustical Society of America, 139, 1285-1293. doi:10.1121/1.4943556
Editora
Acoustical Society of America