野生印度太平洋宽吻海豚打哈欠的研究

IF 0.8 4区 生物学 Q3 ZOOLOGY Mammal Study Pub Date : 2023-04-24 DOI:10.3106/ms2022-0060
Akiko Enokizu, Tadamichi Morisaka, Kazunobu Kogi, M. Yoshioka
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引用次数: 0

摘要

摘要打哈欠被定义为一种不自主的呼吸行为,其特征是吸气时缓慢张开嘴巴,然后是最大的张开阶段,最后是短暂的呼气和闭上嘴巴。最近关于海洋哺乳动物(常见的宽吻海豚和儒艮)打哈欠的报道对这一定义提出了质疑,因为这些海洋哺乳动物在水下打哈欠时没有呼吸。然而,海洋哺乳动物打哈欠的研究仅限于圈养条件下,这表明打哈欠可能是圈养动物的一种异常行为。在这里,我们报道了在日本三仓岛附近自由放养的印度太平洋宽吻海豚打哈欠的情况。从1816个小时的视频数据中,发现了早上8点到10点30分之间发生的5次哈欠。该种群中的海豚可能在早上表现出更多的休息行为,这意味着该种群中打哈欠发生在需要唤醒的休息状态。这是首次报道在印度-太平洋宽吻海豚身上观察到打哈欠的现象。打哈欠在野生种群中的发生表明,这是海豚天生的行为,而不是异常行为。
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Yawning in Wild Indo-Pacific Bottlenose Dolphins (Tursiops aduncus)
Abstract. Yawning is defined as an involuntary behavior with breathing, characterized by a slow opening of the mouth with inhalation, followed by a maximum gaping phase, and ending with a short exhalation and closing of the mouth. Recent reports on yawning in marine mammals (common bottlenose dolphins and a dugong) have challenged this definition because these marine mammals yawn underwater without breathing. However, yawning in marine mammals has only been studied in captive conditions, which indicates the possibility that yawning is an abnormal behavior in captive animals. Here, we report yawning in free-ranging wild Indo-Pacific bottlenose dolphins off Mikura Island, Japan. Five yawnings that occurred between 8:00 am and 10:30 am were identified from 1816 hours of video data. The dolphins in this population may exhibit more resting behaviors in the morning, which implies that yawning in this population occurred in resting states that required arousal. This is the first reported observation of yawning in Indo-Pacific bottlenose dolphins. The occurrence of yawning in a wild population suggests that it is an innate behavior, rather than abnormal behavior, in dolphins.
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来源期刊
Mammal Study
Mammal Study ZOOLOGY-
CiteScore
1.70
自引率
20.00%
发文量
23
审稿时长
>12 weeks
期刊介绍: Mammal Study is the official journal of the Mammal Society of Japan. It publishes original articles, short communications, and reviews on all aspects of mammalogy quarterly, written in English.
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