Long-term changes in the breeding seasonality of Peruvian seabirds and regime shifts in the Northern Humboldt Current System
| Autor: | Arnaud Bertrand, Christophe Barbraud, Giannina Passuni, Ramiro Castillo, Sophie Bertrand, Alexis Chaigneau, Jesus Ledesma, Ricardo Oliveros-Ramos, Marilú Bouchon |
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| Přispěvatelé: | Nelson Mandela University, 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), Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Instituto del Mar del Peru (IMARPE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut de Recherche pour le Développement (IRD), Institute of Research for Development Department - Laboratory for Studies in Geophysics and Spatial Oceanography (LEGOS), Institut National de la Recherche Agronomique (INRA)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA)-Université de La Rochelle (ULR) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
NHCS [SDE.MCG]Environmental Sciences/Global Changes Aquatic Science 010603 evolutionary biology 01 natural sciences Predation Engraulis [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Anchovy biology.animal medicine Northern Humboldt Current System Peruvian booby 14. Life underwater Environmental cues Phalacrocorax bougainvillii Ecology Evolution Behavior and Systematics Sula variegata Ecology biology 010604 marine biology & hydrobiology Cormorant Onset of breeding Seasonality biology.organism_classification medicine.disease Fishery Pelican 13. Climate action Oxycline depth Pelecanus thagus Seabird [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
| Zdroj: | Marine Ecology Progress Series Marine Ecology Progress Series, Inter Research, 2018, 597, pp.231--242. ⟨10.3354/meps12590⟩ Marine Ecology Progress Series (0171-8630) (Inter-research), 2018-06, Vol. 597, P. 231-242 |
| ISSN: | 0171-8630 1616-1599 |
| DOI: | 10.3354/meps12590⟩ |
| Popis: | International audience; In the highly productive Northern Humboldt Current System, 3 seabird species, the Guanay cormorant Phalacrocorax bougainvillii, the Peruvian booby Sula variegata and the Peruvian pelican Pelecanus thagus, commence breeding in austral spring, coinciding with the lowest availability of their prey, the Peruvian anchovy Engraulis ringens. This strategy ensures the matching of increased prey availability when young achieve independence in summer. This pattern was observed during the last decade when anchovy was abundant. However, over the last century, the abundance of anchovy has varied widely due to contrasting interdecadal regimes in oceanographic conditions and fishing activity. We hypothesized that these regime shifts affected the abundance and availability of prey and may have conditioned the breeding seasonality of seabirds. We examined the timing and magnitude of the onset of breeding using dynamic occupancy models and related these parameters to the seasonality of oceanographic conditions, abundance of anchovy and fishing pressure. During a regime of lower anchovy abundance (1977-1990), cormorants showed the highest flexibility, adjusting the timing of breeding from spring to winter and skipping reproduction in the worst conditions. Boobies showed the lowest flexibility, maintaining the same magnitude and timing of onset of breeding in spring. Pelicans showed intermediate flexibility, foregoing breeding during the worst conditions, but maintaining the onset of breeding in spring. The 3 species used sea surface temperature as a cue for the initiation of breeding. Furthermore, given their better diving abilities, cormorants could monitor prey availability changes associated with the reversion in the seasonality of the oxycline depth. |
| Databáze: | OpenAIRE |
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