期刊
PLOS ONE
卷 8, 期 1, 页码 -出版社
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0055163
关键词
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资金
- National Aeronautics and Space Administration [NNG06GH75G1/3]
- National Science Foundation Office of Polar Programs [ANT-0823101, ANT-1019839]
- Gordon and Betty Moore Foundation
- Office of Polar Programs (OPP)
- Directorate For Geosciences [1440435, 1019838, 1326167] Funding Source: National Science Foundation
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 Adelie 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. Adelie penguins foraging locations changed in response to tidal regime switching, and not to daily tidal patterns. The hydrography and foraging patterns of Adelie 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.
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