摘要
Abstract
Marine mammal bioacoustics constitutes an interdisciplinary nexus of biology,acoustics,ecology,engineering,and conservation science,focusing on sound production,propagation,reception and functional applications across cetaceans,pinnipeds and sirenians.This study investigates vocalization characteristics and frequency ranges in these taxa,revealing mechanistic links to body size,environmental adaptation,and evolutionary history.Results demonstrate aquatic adaptations through specialized vocal systems:killer whales(Orcinus orca)generate 1.5-26.2 kHz whistles via nasal phonic lips,with Antarctic populations exhibiting 26.2 kHz peak frequencies that contradict terrestrial mass-dependent frequency scaling;Antarctic minke whales(Balaenoptera bonaerensis)produce frequency-modulated sweeps(115-130 Hz start,60 Hz end,83 Hz peak)coordinated with bio-duck calls(50-300 Hz)for long-distance communication;spotted seals(Phoca largha)vocalize across 139-2 323 Hz,with calves showing significantly higher peak frequencies(1.13 kHz vs.adult 0.99 kHz).Taxonomic specializations include odontocete sound focusing via melons and pinniped bimodal vocal strategies(aerial/aquatic production).关键词
海洋哺乳动物/发声特征/频率/动物行为/声学特性Key words
marine mammals/vocal characteristics/frequency/animal behaviour/acoustic properties分类
农业科技
