Exercise warms adult leatherback turtles
Exercise warms adult leatherback turtles
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DOI：
10.1016/j.cbpa.2006.10.032
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发表时间：
2007-06-01
影响因子：
2.3
通讯作者：
Jones, David R.
中科院分区：
文献类型：
--
作者：
Bostrom, Brian L.;Jones, David R.
棱皮龟（Dermochelys coriacea）可以保持体温（TB）高达18摄氏度以上的周围海水（T-W），使棱皮龟进入寒冷的温带沃茨，并有最大的全球范围内的任何爬行动物。使用一个圆柱形模型的棱皮龟，我们研究了在何种程度上可以使用的棱皮龟的热策略，通过游泳速度的变化，通过产热。在低速风洞中测量了一只棱皮龟的全尺寸铸件的阻力，以估计抵消阻力所需的代谢成本。作为运动代谢成本的副产品，海龟核心释放的热量通过其绝缘层从海龟核心传导到周围的水。通过保持绝缘厚度恒定，我们强调了游泳速度在保持T-B - T-W方面的有效性。我们的模型，当在一个给定的T-W公布的数据进行测试时，显示出在一个给定的T-B预测和测量游泳速度之间的密切相关性。我们的结论是，保持一个大的T-B-T-W的能力是质量，绝缘厚度和水温选择之间的相互作用，但行为控制的游泳速度占主导地位。(c)2006年爱思唯尔公司All rights reserved.
Leatherback sea turtles (Dermochelys coriacea) can maintain body temperature (TB) up to 18 degrees C above that of the surrounding sea water (T-W) which allows leatherbacks to enter cold temperate waters and have the largest global range of any reptile. Using a cylindrical model of a leatherback we investigated the extent to which heat production through variation of swim speed could be used in a leatherback's thermal strategy. Drag force of a full scale cast of a leatherback was measured in a low velocity wind tunnel to obtain an estimate of the metabolic cost needed to offset drag. Heat released in the core of a turtle as a byproduct of the metabolic cost of locomotion is conducted from the core of the turtle to the surrounding water through its insulation layer. By keeping insulation thictmess constant, we highlight the effectiveness of swim speed in maintaining T-B - T-W. Our model, when tested against published data at a given T-W, showed a close correlation between predicted and measured swimming speed at a given T-B. We conclude that the ability to maintain a large T-B-T-W is an interplay between mass, insulation thickness and water temperature selection but behavioural control of swimming speed predominates. (c) 2006 Elsevier Inc. All rights reserved.