Jellyfish and other gelata as food for four penguin species – insights from predator‐borne videos
Jellyfish and other gelata as food for four penguin species – insights from predator‐borne videos
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DOI：
10.1002/fee.1529
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发表时间：
2017-10
影响因子：
10.3
通讯作者：
J. Thiebot;J. Arnould;A. Gómez‐Laich;Kentaro Ito;A. Kato;T. Mattern;H. Mitamura;T. Noda;Timothée A. Poupart;F. Quintana;T. Raclot;Y. Ropert‐Coudert;J. Sala;P. Seddon;G. Sutton;K. Yoda;A. Takahashi
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文献类型：
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作者：
J. Thiebot;J. Arnould;A. Gómez‐Laich;Kentaro Ito;A. Kato;T. Mattern;H. Mitamura;T. Noda;Timothée A. Poupart;F. Quintana;T. Raclot;Y. Ropert‐Coudert;J. Sala;P. Seddon;G. Sutton;K. Yoda;A. Takahashi
水母和其他中上层凝胶生物（“胶冻体”）日益被视为海洋食物网的重要组成部分，但对其了解仍然很少。它们作为海洋猎物的重要性极难量化，部分原因是在核实对凝胶状结构的捕食方面存在方法上的挑战。小型化的动物视频数据记录仪现在可以从捕食者的角度监控进食事件。我们收集了大量的视频数据集（超过350小时的可利用镜头），来自南大洋（30°S以南地区）的四种非凝胶状捕食者（企鹅）的106个个体。我们记录了近200例有针对性的攻击食肉胶冻的所有四个物种，在所有七个研究地点。我们的研究结果强调，凝胶状生物实际上代表了一个广泛的，但目前代表性不足的营养链在整个南部海洋，即使是吸热的捕食者，这有很高的能量需求。使用现代技术工具，如动物携带的视频数据记录仪，将有助于正确确定胶冻的生态位。
Jellyfish and other pelagic gelatinous organisms (“gelata”) are increasingly perceived as an important component of marine food webs but remain poorly understood. Their importance as prey in the oceans is extremely difficult to quantify due in part to methodological challenges in verifying predation on gelatinous structures. Miniaturized animal-borne video data loggers now enable feeding events to be monitored from a predator's perspective. We gathered a substantial video dataset (over 350 hours of exploitable footage) from 106 individuals spanning four species of non-gelatinous-specialist predators (penguins), across regions of the southern oceans (areas south of 30°S). We documented nearly 200 cases of targeted attacks on carnivorous gelata by all four species, at all seven studied localities. Our findings emphasize that gelatinous organisms actually represent a widespread but currently under-represented trophic link across the southern oceans, even for endothermic predators, which have high energetic demands. The use of modern technological tools, such as animal-borne video data loggers, will help to correctly identify the ecological niche of gelata.