Diving behavior and performance of harbor porpoises, Phocoena phocoena, in Funka Bay, Hokkaido, Japan
Diving behavior and performance of harbor porpoises, Phocoena phocoena, in Funka Bay, Hokkaido, Japan
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DOI：
10.1111/j.1748-7692.1998.tb00711.x
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发表时间：
1998-04-01
影响因子：
2.3
通讯作者：
Kato, A
中科院分区：
文献类型：
--
作者：
Otani, S;Naito, Y;Kato, A
为了监测自由放养的鲸类动物的潜水行为，微型数据记录器，与预编程的释放机制，连接到两个雌性港鼠海豚（Phocoena phocoena）的背鳍在Funka湾，北海道，日本，在1994年。两个记录器被成功回收，共获得141小时的潜水数据（4 671次潜水的深度和水温）。这两只鼠海豚几乎连续潜水，很少在水面上长时间休息。最大下潜深度分别为98.6米和70.8米，超过70%的潜水时间在20米或以下。与U形潜水相比，V形潜水的潜水深度明显较浅，潜水持续时间较短。在俯冲过程中下降速率不是恒定的。下潜深度越深，平均下降速率和初始下降速率越快。这表明，海豚在开始潜水之前就已经预料到了它们将下潜的深度。
In order to monitor the diving behavior of free-ranging cetaceans, micro-dataloggers, with pre-programmed release mechanisms, were attached to the dorsal fins of two female harbor porpoises (Phocoena phocoena) in Funka Bay, Hokkaido, Japan, in 1994. The two loggers were successfully recovered and a total of 141 h of diving data (depth and water temperature in 4,671 dives) was obtained. Both porpoises dived almost continuously, rarely exhibiting long-term rest at the surface. Maximum dive depths were 98.6 m and 70.8 m, respectively, with more than 70% of diving time at 20 m or less. Most shallow dives were V-shaped with no bottom time. The V-shaped dives were significantly shallower in dive depth and shorter in dive duration than U-shaped dives. Descent rate was not constant during a dive. The deeper the dive depths, the faster the mean descent and initial descent rates. This suggests that porpoises have anticipated the depth to which they will dive before initiating the dive itself.