Oceanic thermal structure mediates dive sequences in a foraging seabird
| Autor: | Akiko Kato, Francisco Ramírez, Xavier Meyer, Yan Ropert-Coudert, Andrew J. J. MacIntosh, André Chiaradia, Cédric Sueur |
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| Přispěvatelé: | Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Kyoto University [Kyoto], Research Department, Phillip Island Nature Parks, Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Universidad de Málaga [Málaga] = University of Málaga [Málaga], Département Ecologie, Physiologie et Ethologie (DEPE-IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
thermocline Foraging Aucun foraging behavior fractal analysis 010603 evolutionary biology 01 natural sciences Predation 03 medical and health sciences Water column sea surface temperature lcsh:QH540-549.5 biology.animal behavioral complexity Marine ecosystem 14. Life underwater Ecology Evolution Behavior and Systematics Original Research 030304 developmental biology Nature and Landscape Conservation Trophic level 0303 health sciences Eudyptula minor Ecology biology biology.organism_classification Oceanography [SDE]Environmental Sciences little penguin Environmental science lcsh:Ecology hal-02638795 Seabird Thermocline |
| Zdroj: | Ecology and Evolution, Vol 10, Iss 13, Pp 6610-6622 (2020) Ecology and Evolution Ecology and Evolution, Wiley Open Access, 2020, 10, pp.6610-6622. ⟨10.1002/ece3.6393⟩ |
| ISSN: | 2045-7758 |
| DOI: | 10.1002/ece3.6393 |
| Popis: | Changes in marine ecosystems are easier to detect in upper‐level predators, like seabirds, which integrate trophic interactions throughout the food web.Here, we examined whether diving parameters and complexity in the temporal organization of diving behavior of little penguins (Eudyptula minor) are influenced by sea surface temperature (SST), water stratification, and wind speed—three oceanographic features influencing prey abundance and distribution in the water column.Using fractal time series analysis, we found that foraging complexity, expressed as the degree of long‐range correlations or memory in the dive series, was associated with SST and water stratification throughout the breeding season, but not with wind speed. Little penguins foraging in warmer/more‐stratified waters exhibited greater determinism (memory) in foraging sequences, likely as a response to prey aggregations near the thermocline. They also showed higher foraging efficiency, performed more dives and dove to shallower depths than those foraging in colder/less‐stratified waters.Reductions in the long‐term memory of dive sequences, or in other words increases in behavioral stochasticity, may suggest different strategies concerning the exploration–exploitation trade‐off under contrasting environmental conditions. Little penguins foraging in warmer/more‐stratified waters exhibited less stochastic foraging sequences likely as a response to prey aggregations nearby the thermocline. Ultimately, they showed higher foraging efficiency and numbers of dives, and lower mean dive depths than those foraging in colder/less‐stratified waters. |
| Databáze: | OpenAIRE |
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