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首页> 外文期刊>Marine biology >Physiological and behavioural thermoregulation of juvenile yellowfin tuna Thunnus albacares in subtropical waters
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Physiological and behavioural thermoregulation of juvenile yellowfin tuna Thunnus albacares in subtropical waters

机译：亚热带水中少年黄鳍金枪鱼Thunnus Albacares的生理和行为热调节

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摘要

Fish of the genus Thunnus are unusual because they are regional endotherms. In this study, archival tag data were used to demonstrate behavioural and physiological thermoregulation in juvenile yellowfin tuna, Thunnus albacares (35-52 cm fork length). Tags inserted into the peritoneal cavity were recovered from 23 yellowfin tuna caught mainly around Ishigaki Island, Japan, in 2009-2012. Peritoneal and environmental temperatures and depth data revealed that juvenile yellowfin tuna made daytime bounce dives repeatedly with a median dive duration of 16 min, and they remained at the surface during night-time. Body temperature daily averages were slightly higher than those of ambient temperature, and the body temperatures varied according to ambient temperature changes associated with vertical movements. Heat exchange coefficients (.) during dives were estimated by a heat budget model. The thermal inertia component of. was estimated in an experiment with dead juvenile yellowfin tuna. The value of. exceeded the measured thermal inertia and varied between ascents and descents, thus providing evidence that physiological thermoregulation contributes to. in juvenile yellowfin tuna and varies according to environmental temperature. Physiological thermoregulation helps maintain relatively stable body temperatures during dives in which tuna behaviourally escape cool deep waters and enter warm surface waters. Comparison of the obtained physiological parameters of. and heat production (..T m) with those previously recorded in Pacific bluefin tuna indicate that yellowfin tuna has a higher. and lower.T m than Pacific bluefin tuna, which may restrict yellowfin tuna to warm tropical and subtropical surface waters.
机译：Thunnus属的鱼是不寻常的，因为它们是区域吸热。在本研究中，归档标签数据用于展示少年黄素金枪鱼，Thunnus Albacares（35-52厘米叉长）中的行为和生理热调节。 2009 - 2012年，从主要捕获的23个Yellowfin金枪鱼中恢复了插入腹膜腔的标签。腹膜和环境温度和深度数据显示，少年黄鳍金枪鱼在16分钟的中位潜水持续时间反复潜水，它们在夜间留在表面。体温日平均值略高于环境温度，并且体温根据与垂直运动相关的环境温度变化而变化。通过热预算模型估算潜水期间的热交换系数（。）。热惯性组分。估计在一个死亡少年黄鳍金枪鱼的实验中。的价值。超过测量的热惯性并在升级和下列之间变化，从而提供了生理热调节有助于的证据。在少年黄鳍金枪鱼中，根据环境温度变化。生理热调节有助于在潜水期间保持相对稳定的体温，其中金枪鱼行为逸出凉爽的深水，进入温暖的表面水域。所得生理参数的比较。和热量生产（米）与先前在太平洋蓝鳍金枪鱼中记录的那些表明黄鳍金枪鱼有更高的。而不是太平洋蓝鳍金枪鱼，这可能将黄鳍金枪鱼限制为温暖的热带和亚热带表面水域。

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  • 来源
    《Marine biology》 |2020年第6期|71.1-71.14|共14页
  • 作者

    Aoki Yoshinori; Aoki Akiko; Ohta Itaru; Kitagawa Takashi;

  • 作者单位

    Japan Fisheries Res & Educ Agcy Natl Res Inst Far Sea Fisheries Shimizu Shizuoka 4248633 Japan;

    Japan Fisheries Res & Educ Agcy Natl Res Inst Far Sea Fisheries Shimizu Shizuoka 4248633 Japan;

    Okinawa Prefectural Govt Dept Agr Forestry & Fisheries Fisheries Div 1-2-2 Izumizaki Naha Okinawa 9008570 Japan;

    Univ Tokyo Atmosphere & Ocean Res Inst Int Coastal Res Ctr 1-19-8 Akahama Otsuchi Iwate 0281102 Japan;

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