Sub-ice foraging behavior of emperor penguins.
Sub-ice foraging behavior of emperor penguins.
复制标题
帝企鹅的冰下觅食行为。
DOI：
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发表时间：
2000
影响因子：
2.8
通讯作者：
D. H. Levenson
中科院分区：
文献类型：
--
作者：
P. Ponganis;R. V. van Dam;G. Marshall;T. Knower;D. H. Levenson
帝企鹅（Aptenodytes forsteri）配备了一个远程水下摄像机，Crittercam，以评估冰下觅食行为，而鸟类从一个孤立的潜水孔潜水。三只鸟潜水和觅食成功1小时的时间后，被训练穿和潜水与相机附件的安全带。视频和深度剖面记录显示，帝企鹅在较浅的深度（<50米）旅行，上升到冰的表面下以鱼为食，然后下降到深处返回出口孔。尽管携带Crittercam的个体鸟类的平均潜水持续时间比不携带相机的这些相同鸟类的潜水持续时间短21- 35%，但两种情况下的潜水概况相似，因此证明了不携带相机的鸟类潜水中的相似觅食策略。尽管用相机潜水的时间较短，但在91次潜水中，80%的企鹅仍然成功捕获了猎物，持续时间超过1分钟。猎物包括亚冰鱼Pagothenia borchgrevinki。狩猎上升（从深度到表面5米以内）发生在85%的潜水，范围从零到三个潜水，并与成功捕获猎物在77%的128上升。偶尔，几条鱼被捕获在一个单一的上升。这些观察和视频技术的应用为进一步的觅食生理和行为研究创造了一个模型，也强调了浅潜水作为帝企鹅在海上觅食期间食物摄入来源的潜在重要性。
Emperor penguins (Aptenodytes forsteri) were equipped with a remote underwater video camera, the Crittercam, to evaluate sub-ice foraging behavior while the birds dived from an isolated dive hole. Three birds dived and foraged successfully for 1 h periods after being trained to wear and to dive with a harness for camera attachment. Video and depth profile recordings revealed that emperor penguins travel at shallow depths (<50 m), ascend to the undersurface of the ice to feed on fish, and descend back to depth to return to the exit hole. Although the mean durations of dives of individual birds with the Crittercam were 21-35 % shorter than the diving durations of these same birds without the camera, the dive profiles in both situations were similar, thus demonstrating a similar foraging strategy in birds diving without the camera. Despite shorter diving durations with the camera, the penguins were still successful at prey capture in 80 % of 91 dives greater than 1 min in duration. Prey included the sub-ice fish Pagothenia borchgrevinki. Hunting ascents (from depth to within 5 m of the surface) occurred in 85 % of dives, ranged from zero to three per dive, and were associated with successful prey capture in 77 % of 128 ascents. Occasionally, several fish were captured during a single ascent. These observations and this application of video technology create a model for further physiological and behavioral studies of foraging, and also emphasize the potential importance of shallow dives as sources of food intake for emperor penguins during foraging trips to sea.
帝企鹅在海冰下潜水的心率和游泳速度。
DOI：
10.1242/jeb.165.1.161
发表时间：
1992
期刊：
The Journal of experimental biology
影响因子：
--
作者：
Kooyman,GL;Ponganis,PJ;Castellini,MA;Ponganis,EP;Ponganis,KV;Thorson,PH;Eckert,SA;LeMaho,Y
通讯作者：
LeMaho,Y