Fish yawn: the state-change hypothesis in juvenile white-spotted char Salvelinus leucomaenis
Fish yawn: the state-change hypothesis in juvenile white-spotted char Salvelinus leucomaenis
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鱼打哈欠：白斑红点鲑幼鱼的状态变化假说
DOI：
10.1007/s10164-023-00777-2
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发表时间：
2023
影响因子：
0.9
通讯作者：
Wada Satoshi
中科院分区：
文献类型：
--
作者：
Yamada Hiroyuki;Wada Satoshi
打哈欠是脊椎动物中普遍存在的刻板行为。打哈欠可能通过其唤醒功能引起动物的行为状态变化，但没有研究明确检验鱼类的这种状态变化假说。本研究检验了幼年白斑红点鲑（Salvelinus leucomaenis）的状态变化假说。在实验室的 600 秒观察中，我们观察到 41 名青少年中有 23 人打了 48 次哈欠。其中 32 个哈欠发生在幼鱼静止在基质上时，并且在从静止到活动的行为转变之前立即集中。这些结果支持状态变化假说。行为转变后观察到16个哈欠，其持续时间比转变前更长。尽管我们怀疑过渡后长时间打哈欠可能与幼年的进食和体温调节有关，但我们无法确定这种差异的原因。需要进一步研究来了解鱼类打哈欠和动物打哈欠的起源。
Yawning is a ubiquitous stereotyped action in vertebrates. Yawning may induce behavioral state changes in animals through its arousal function, but no studies have explicitly examined this state-change hypothesis in fish. This study examined the state-change hypothesis in juvenile white-spotted char,Salvelinus leucomaenis. We observed 48 yawns in 23 out of 41 juveniles during 600 s of observation in the laboratory. Thirty-two of these yawns occurred while juveniles were stationary on the substrate, and they were concentrated immediately before the behavioral transition from stationary to active. These results support the state-change hypothesis. Sixteen yawns were observed after the behavioral transition, and their durations were longer than those before the transition. Although we suspected that this prolonged yawning after the transition would be associated with feeding and thermoregulation in the juveniles, we could not determine the cause of this difference. Further studies are needed to understand fish yawning and the origin of animal yawning.
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