Adélie Penguin Foraging Location Predicted by Tidal Regime Switching
Adélie Penguin Foraging Location Predicted by Tidal Regime Switching
复制标题
通过潮汐状态切换预测阿德利企鹅觅食位置
作者：
M. Oliver;A. Irwin;M. Moline;W. Fraser;D. Patterson;O. Schofield;J. Kohut
企鹅觅食和繁殖的成功取决于其栖息地的大规模环境和局部水文特征。我们调查了当地潮流对汉布尔群岛上阿德利企鹅种群的影响，南极洲我们使用卫星标记的企鹅，自主水下航行器和历史潮汐记录来模拟十个季节的企鹅觅食地点。轴承的潮汐电流没有每天振荡，而是昼夜和半日潮制度之间。阿德利企鹅觅食地点的变化，潮汐制度切换，而不是每天的潮汐模式。水文和觅食模式的阿德利企鹅在这些切换的潮汐制度表明，他们正在应对不断变化的猎物的可用性，因为他们集中和分散在附近的帕尔默深可变的潮汐迫使每周的时间尺度，提供了一个本地电流和生态之间的联系，这种捕食者。
Penguin foraging and breeding success depend on broad-scale environmental and local-scale hydrographic features of their habitat. We investigated the effect of local tidal currents on a population of Adélie penguins on Humble Is., Antarctica. We used satellite-tagged penguins, an autonomous underwater vehicle, and historical tidal records to model of penguin foraging locations over ten seasons. The bearing of tidal currents did not oscillate daily, but rather between diurnal and semidiurnal tidal regimes. Adélie penguins foraging locations changed in response to tidal regime switching, and not to daily tidal patterns. The hydrography and foraging patterns of Adélie penguins during these switching tidal regimes suggest that they are responding to changing prey availability, as they are concentrated and dispersed in nearby Palmer Deep by variable tidal forcing on weekly timescales, providing a link between local currents and the ecology of this predator.