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Using an omnidirectional video logger to observe the underwater life of marine animals: Humpback whale resting behaviour
Behavioural Processes ( IF 1.3 ) Pub Date : 2021-02-25 , DOI: 10.1016/j.beproc.2021.104369
Takashi Iwata , Martin Biuw , Kagari Aoki , Patrick James O’Malley Miller , Katsufumi Sato

Animal-borne video loggers are powerful tools for investigating animal behaviour because they directly record immediate and extended peripheral animal activities; however, typical video loggers capture only a limited area on one side of an animal being monitored owing to their narrow field of view. Here, we investigated the resting behaviour of humpback whales using an animal-borne omnidirectional video camera combined with a behavioural data logger. In the video logger footage, two non-tagged resting individuals, which did not spread their flippers or move their flukes, were observed above a tagged animal, representing an apparent bout of group resting. During the video logger recording, the swim speed was relatively slow (0.75 m s−1), and the tagged animal made only a few strokes of very low amplitude during drift diving. We report the drift dives as resting behaviour specific to baleen whales as same as seals, sperm whales and loggerhead turtles. Overall, our study shows that an omnidirectional video logger is a valuable tool for interpreting animal ecology with improved accuracy owing to its ability to record a wide field of view.



中文翻译:

使用全向视频记录器观察海洋动物的水下生活:座头鲸的休息行为

动物载视频记录器是调查动物行为的强大工具,因为它们直接记录了即时和扩展的外围动物活动。但是,典型的视频记录器由于视野狭窄,只能捕获被监视动物一侧的有限区域。在这里,我们使用动物传播的全向摄像机结合行为数据记录器,调查了座头鲸的休息行为。在录像机录像中,观察到在贴有标签的动物上方观察到两个未贴标签的静止个体,他们没有张开脚蹼或移动吸钩,这显然是一组集体休息。在视频记录器记录期间,游泳速度相对较慢(0.75 ms -1),并且在漂流潜水期间,被标记的动物只做出了几幅非常低幅度的行程。我们将漂流潜水报告为与鲸鱼,海wh,抹香鲸和海龟相同的,属于须鲸的静息行为。总体而言,我们的研究表明,全向视频记录器由于能够记录广阔的视野,因此是一种具有较高准确性的解释动物生态学的有价值的工具。

更新日期:2021-03-04
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