Rush and grab strategies in foraging marine endotherms: the case for haste in penguins
Rush and grab strategies in foraging marine endotherms: the case for haste in penguins
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海洋温热动物觅食时的匆忙和抢夺策略：企鹅匆忙的案例
DOI：
10.1006/anbe.2001.1883
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发表时间：
2002
期刊：
影响因子：
2.5
通讯作者：
A. Kato
中科院分区：
文献类型：
--
作者：
R. Wilson;Y. Ropert‐Coudert;A. Kato
通过潜水觅食的呼吸空气的海洋捕食者游泳的速度可能取决于各种因素，这些因素与那些获得氧气是无限的动物的相关因素有很大的不同。我们使用伐木机连接到自由生活的企鹅，以检查的速度，其中三个物种游泳期间寻找猎物，并比较这与他们的速度在实际的猎物追求。所有的企鹅物种似乎在表面和觅食深度之间的正常通勤，这符合密切的最低成本的运输以类似的速度约2米/秒。然而，阿德利企鹅（Pygoscelis adeliae）放慢了进食速度，麦哲伦企鹅（Spheniscus magellanicus）加快了进食速度，而王企鹅（Aptenodytes patagonicus）则以各种速度旅行，尽管平均速度与正常通勤没有变化。由于能量消耗，因此氧气的使用，在游泳动物的速度的立方增加，我们假设，猎物逃逸速度（猎物大小的函数）和猎物密度将证明在确定最佳的追求速度在捕食者的关键。这种类型的简单模型有助于解释为什么有些企鹅物种显然通过增加捕获猎物的速度而受益，而其他物种则通过降低速度而受益。
The speed at which air-breathing marine predators that forage by diving should swim is likely to depend on a variety of factors that differ substantially from those relevant in animals for which access to oxygen is unlimited. We used loggers attached to free-living penguins to examine the speed at which three species swam during periods searching for prey and compared this to their speeds during actual prey pursuit. All penguin species appeared to travel at similar speeds around 2 m/s during normal commuting between the surface and feeding depths, which accords closely with minimum costs of transport. However, Adelie penguins, Pygoscelis adeliae, slowed down to feed, Magellanic penguins, Spheniscus magellanicus, speeded up and king penguins, Aptenodytes patagonicus, travelled at a variety of speeds, although mean speed did not change from normal commuting. Since energy expenditure, and therefore oxygen usage, in swimming animals increases with the cube of the speed, we hypothesized that prey escape speed (a function of prey size) and prey density would prove critical in determining optimum pursuit speeds in predators. Simple models of this type help explain why it is that some penguin species apparently benefit by increasing speed to capture prey while others benefit by decreasing speed.
布伦尼希海鸠潜水游泳速度的机械与生理决定因素。
DOI：
10.1242/jeb.202.13.1741
发表时间：
1999
期刊：
The Journal of experimental biology
影响因子：
--
作者：
Lovvorn,JR;Croll,DA;Liggins,GA
通讯作者：
Liggins,GA