Behaviour and physiology: the thermal strategy of leatherback turtles.
Behaviour and physiology: the thermal strategy of leatherback turtles.
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DOI：
10.1371/journal.pone.0013925
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发表时间：
2010-11-10
期刊：
影响因子：
3.7
通讯作者：
Jones DR
中科院分区：
文献类型：
--
作者：
Bostrom BL;Jones TT;Hastings M;Jones DR
成年革龟(Demochelys Coriacea)在亚极地水域的≥8°C和热带的≤4°C的环境中表现出身体和环境之间的温度梯度。目前还没有关于棱皮鱼体温调节的直接证据，尽管建模和形态研究已经给出了体温调节如何实现的迹象。通过对16公斤和37公斤重的棱皮鱼幼体的研究，我们首次证明棱皮鱼确实能够调节体温。在冷水(<；25°C)中，鳍状肢的击打频率增加，通过胎盘、甲壳和鳍状肢的热量损失最小，并在身体和环境之间保持高达2.3°C的正温度梯度。在温水(25-31℃)中，海龟处于不活动状态，通过其胎盘、甲壳和鳍片的热量损失增加。温度梯度最小(0.5°C)。使用比例模型，我们估计一只300公斤的成年棱皮鱼能够在寒冷的亚极地水域保持18.2°C的最大温度梯度。在棱皮幼体中，热量的增加是通过增加活动量来控制行为的，而热通量则是通过生理上的调节，大概是通过调节血流分布来调节的。因此，利用生理和行为可以让棱皮鱼在寒冷的亚极地水域觅食时保持温暖，并防止在热带环境中过热。
Adult leatherback turtles (Dermochelys coriacea) exhibit thermal gradients between their bodies and the environment of ≥8°C in sub-polar waters and ≤4°C in the tropics. There has been no direct evidence for thermoregulation in leatherbacks although modelling and morphological studies have given an indication of how thermoregulation may be achieved. We show for the first time that leatherbacks are indeed capable of thermoregulation from studies on juvenile leatherbacks of 16 and 37 kg. In cold water (< 25°C), flipper stroke frequency increased, heat loss through the plastron, carapace and flippers was minimized, and a positive thermal gradient of up to 2.3°C was maintained between body and environment. In warm water (25 – 31°C), turtles were inactive and heat loss through their plastron, carapace and flippers increased. The thermal gradient was minimized (0.5°C). Using a scaling model, we estimate that a 300 kg adult leatherback is able to maintain a maximum thermal gradient of 18.2°C in cold sub-polar waters. In juvenile leatherbacks, heat gain is controlled behaviourally by increasing activity while heat flux is regulated physiologically, presumably by regulation of blood flow distribution. Hence, harnessing physiology and behaviour allows leatherbacks to keep warm while foraging in cold sub-polar waters and to prevent overheating in a tropical environment.
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DOI：
10.1016/j.jembe.2006.03.013
发表时间：
2006-08-08
影响因子：
2
作者：
James, Michael C.;Davenport, John;Hays, Graeme C.
通讯作者：
Hays, Graeme C.
DOI：
10.1016/j.cbpa.2006.10.032
发表时间：
2007-06-01
影响因子：
2.3
作者：
Bostrom, Brian L.;Jones, David R.
通讯作者：
Jones, David R.
影响因子：
2.8
作者：
Davenport, John;Fraher, John;Cuffe, Tracy
通讯作者：
Cuffe, Tracy
影响因子：
64.8
作者：
PALADINO, FV;OCONNOR, MP;SPOTILA, JR
通讯作者：
SPOTILA, JR
影响因子：
2.7
作者：
STANDORA, EA;SPOTILA, JR;FOLEY, RE
通讯作者：
FOLEY, RE