New stereo acoustic data logger for free-ranging dolphins and porpoises
New stereo acoustic data logger for free-ranging dolphins and porpoises
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DOI：
10.4031/002533205787443980
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发表时间：
2005-06-01
影响因子：
0.8
通讯作者：
Oota, K
中科院分区：
文献类型：
--
作者：
Akamatsu, T;Matsuda, A;Oota, K
为了观察海豚和江豚的生物声纳行为，研制了一种微型立体声声记录器，用于记录小型鲸类的回声定位声。“A标签”装置小到足以附着在海豚或鼠海豚身上。A标签可以记录声纳脉冲强度，精确的点击间隔，以及声音到达两个不同水听器之间的时间差。A-标签可连续工作长达60小时，并允许观察自由活动的齿鲸类的声纳目标范围。到达标签上的两个水听器的时间允许识别附近个体的发声。还开发了一种使用吸盘的侵入性较小的标记技术。在中国淡水系统中，自由放养的江豚的平均附着时间为15小时。A标签被证明是一个有用的工具，研究水下回声定位行为的牙鲸类。
To observe the bio-sonar behavior of dolphins and, porpoises, a, miniature stereo acous tic data logger was developed to record the echolocation clicks of small cetaceans. The 'A-tag' device is small enough to be attached to a dolphin or porpoise. A-tag can record the sonar pulse intensity, precise inter-click-intervals, and time difference between sounds arriving at two different hydrophones. The A-tag works for up to 60 hours continuously and allows observation of the sonar target range of free-ranging odontocetes. The time of arrival at the two hydrophones on the tag allows vocalizations from nearby individuals to be identified. A less invasive tagging technique using a suction cup was also developed. A mean attachment time of 15 hours was obtained on free ranging finless porpoises in a freshwater system in China. The A-tag proved to be a useful tool for investigating the underwater echolocation behavior of odontocetes.