Neutral buoyancy is optimal to minimize the cost of transport in horizontally swimming seals.

Neutral buoyancy is optimal to minimize the cost of transport in horizontally swimming seals.
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DOI:
10.1038/srep02205
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Miller, Patrick J. O.
Miller, Patrick J. O.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Sato, Katsufumi;Aoki, Kagari;Watanabe, Yuuki Y.;Miller, Patrick J. O.

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飞行动物和陆地动物需要消耗能量来移动,同时支撑它们的重量来对抗重力。另一方面,在浮力的支持下,水生动物可以最大限度地减少支撑其体重的能量成本,并且中性浮力被认为对水生动物有利。然而,一些研究表明,水生动物可能使用非中性浮力进行滑翔,从而节省运动的能量成本。我们操纵海豹的身体密度,使用可拆卸的重量和浮子,并比较了在自然条件下,使用动物携带的记录器水平游泳海豹的中风努力。结果表明,当海豹接近中性浮力时,它们在给定速度下游泳的划水努力较小。我们的结论是,中性浮力可能是最好的身体密度,以尽量减少运输成本在水平游泳的海豹。
Flying and terrestrial animals should spend energy to move while supporting their weight against gravity. On the other hand, supported by buoyancy, aquatic animals can minimize the energy cost for supporting their body weight and neutral buoyancy has been considered advantageous for aquatic animals. However, some studies suggested that aquatic animals might use non-neutral buoyancy for gliding and thereby save energy cost for locomotion. We manipulated the body density of seals using detachable weights and floats, and compared stroke efforts of horizontally swimming seals under natural conditions using animal-borne recorders. The results indicated that seals had smaller stroke efforts to swim a given speed when they were closer to neutral buoyancy. We conclude that neutral buoyancy is likely the best body density to minimize the cost of transport in horizontal swimming by seals.
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发表时间: 2001-04-01
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