CLICK CHARACTERISTICS OF NORTHERN BOTTLENOSE WHALES (HYPEROODON AMPULLATUS)
CLICK CHARACTERISTICS OF NORTHERN BOTTLENOSE WHALES (HYPEROODON AMPULLATUS)
复制标题
北方宽吻鲸（Hyperoodon ampullatus）的点击特征
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
H. Whitehead
中科院分区：
文献类型：
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作者：
S. Hooker;H. Whitehead
北部宽吻鲸(Hyperoodon AmPullatus)在新斯科舍省附近的海底峡谷记录下发出的声音，主要由滴答声组成。在428分钟的录音中，没有听到哨声，这可以明确地归因于宽吻鲸的声音。有两种主要类型的咔哒声序列，最初的区别在于接收到的幅度差异很大。响亮的点击(由附近的鲸鱼在水面上社交产生)很快，点击间隔短而可变(平均0.07秒；变异系数71%)。它们的频谱是可变的，往往是多峰的，峰值频率在2到22 kHz之间(平均11 kHz，变异系数59%)。在低幅度(由遥远的鲸鱼产生，推测是在深海觅食)收到的短声具有更一致的短声间隔(平均0.40秒，变异系数12.5%)，一般为单峰频谱，平均峰值频率为24千赫(变异系数7%)，3分贝带宽为4千赫。回声定位间隔可以反映动物的大致搜索距离，在这种情况下为300米，与抹香鲸的搜索距离相当。点击频率与被调查对象大小之间的关系表明，对于大约6厘米或更大的对象，24 kHz将是最佳的，这与它们的鱿鱼猎物的大小范围一致。
Sounds produced by northern bottlenose whales (Hyperoodon ampullatus) recorded in the Gully, a submarine canyon off Nova Scotia, consisted predominately of clicks. In 428 min of recordings no whistles were heard which could unequivocally be attributed to bottlenose whales. There were two major types of click series, initially distinguished by large differences in received amplitude. Loud clicks (produced by nearby whales socializing at the surface) were rapid, with short and variable interclick intervals (mean 0.07 sec; CV 71%). The frequency spectra of these were variable and often multimodal, with peak frequencies ranging between 2 and 22 kHz (mean 11 kHz, CV 59%). Clicks received at low amplitude (produced by distant whales, presumably foraging at depth) had more consistent interclick intervals (mean 0.40 sec, CV 12.5%), generally unimodal frequency spectra with a mean peak frequency of 24 kHz (CV 7%) and 3 dB bandwidth of 4 kHz. Echolocation interclick intervals may reflect the approximate search distance of an animal, in this case 300 m, comparable to that found for sperm whales. The relationship between click frequency and the size of object being investigated, suggests that 24 kHz would be optimal for an object of approximately 6 cm or more, consistent with the size range of their squid prey.