亚马逊河豚（Inia geoffrensis）的发声：特征、物理环境的影响及种群间差异

Vocalizations of Amazon river dolphins (Inia geoffrensis): Characterization, effect of physical environment and differences between populations.

作者信息

Amorim Thiago Orion Simões, Andriolo Artur, Reis Sarah S, dos Santos Manuel E

机构信息

Laboratório de Ecologia Comportamental e Bioacústica, Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro São Pedro, 36036-900 Juiz de Fora, Minas Gerais, Brasil.

Marine and Environmental Sciences Centre, ISPA - Instituto Universitário, Rua Jardim do Tabaco, 34, 1149-041 Lisboa, P-1149-041 Portugal.

出版信息

J Acoust Soc Am. 2016 Mar;139(3):1285-93. doi: 10.1121/1.4943556.

DOI:10.1121/1.4943556

PMID:27036265

Abstract

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.

摘要

亚马逊河豚的发声曲目及其地理变异仍然鲜为人知，尤其是与生态变量相关的方面。在此，我们描述了在亚马逊河两个保护区记录的低频脉冲发声（单脉冲或多脉冲）的声学特征，并分析了与水属性相关的声发射差异。频率和时间参数均因水体浊度的非生物条件而异。动物声学行为的变化可能是由于富泥沙水和清水之间声音传播的差异。在频率和时间参数方面发现了地理变异，需要进一步研究。