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dc.contributor.authorLe Guen, Camille
dc.contributor.authorKato, Akiko
dc.contributor.authorRaymond, Ben
dc.contributor.authorBarbraud, Christophe
dc.contributor.authorBeaulieu, Michaël
dc.contributor.authorBost, Charles-André
dc.contributor.authorDelord, Karine
dc.contributor.authorMacIntosh, Andrew J J
dc.contributor.authorMeyer, Xavier
dc.contributor.authorRaclot, Thierry
dc.contributor.authorSumner, Michael
dc.contributor.authorTakahashi, Akinori
dc.contributor.authorThiebot, Jean-Baptiste
dc.contributor.authorRopert-Coudert, Yan
dc.identifier.citationLe Guen , C , Kato , A , Raymond , B , Barbraud , C , Beaulieu , M , Bost , C-A , Delord , K , MacIntosh , A J J , Meyer , X , Raclot , T , Sumner , M , Takahashi , A , Thiebot , J-B & Ropert-Coudert , Y 2018 , ' Reproductive performance and diving behaviour share a common sea-ice concentration optimum in Adélie penguins ( Pygoscelis adeliae ) ' , Global Change Biology , vol. Early View .
dc.identifier.otherPURE: 254684825
dc.identifier.otherPURE UUID: b2973e51-1e1f-461d-9686-f01bd64b94c4
dc.identifier.othercrossref: 10.1111/gcb.14377
dc.identifier.otherScopus: 85050639532
dc.identifier.otherWOS: 000447760300025
dc.descriptionThis study was financially supported by the following institutions: the WWF-UK through R. Downie, the Japanese Mombukagakusho and the Japanese Society for the Promotion of Science, the Zone Atelier Antarctique et Subantarctique –LTER France of the CNRS.en
dc.description.abstractThe Southern Ocean is currently experiencing major environmental changes, including in sea‐ice cover. Such changes strongly influence ecosystem structure and functioning and affect the survival and reproduction of predators such as seabirds. These effects are likely mediated by reduced availability of food resources. As such, seabirds are reliable eco‐indicators of environmental conditions in the Antarctic region. Here, based on 9 years of sea‐ice data, we found that the breeding success of Adélie penguins (Pygoscelis adeliae) reaches a peak at intermediate sea‐ice cover (ca. 20%). We further examined the effects of sea‐ice conditions on the foraging activity of penguins, measured at multiple scales from individual dives to foraging trips. Analysis of temporal organisation of dives, including fractal and bout analyses, revealed an increasingly consistent behaviour during years with extensive sea‐ice cover. The relationship between several dive parameters and sea‐ice cover in the foraging area appears to be quadratic. In years of low and high sea‐ice cover, individuals adjusted their diving effort by generally diving deeper, more frequently and by resting at the surface between dives for shorter periods of time than in years with intermediate sea‐ice cover. Our study therefore suggests that sea‐ice cover is likely to affect the reproductive performance of Adélie penguins through its effects on foraging behaviour, as breeding success and most diving parameters share a common optimum. Some years, however, deviated from this general trend, suggesting that other factors (e.g. precipitation during the breeding season) might sometimes become preponderant over the sea‐ice effects on breeding and foraging performance. Our study highlights the value of monitoring fitness parameters and individual behaviour concomitantly over the long‐term to better characterize optimal environmental conditions and potential resilience of wildlife. Such an approach is crucial if we want to anticipate the effects of environmental change on Antarctic penguin populations.
dc.relation.ispartofGlobal Change Biologyen
dc.rights© 2018 John Wiley & Sons Ltd. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at:
dc.subjectSea iceen
dc.subjectPygoscelis adeliaeen
dc.subjectDiving activityen
dc.subjectForaging strategiesen
dc.subjectBreeding successen
dc.subjectGE Environmental Sciencesen
dc.subjectQH301 Biologyen
dc.titleReproductive performance and diving behaviour share a common sea-ice concentration optimum in Adélie penguins (Pygoscelis adeliae)en
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Pelagic Ecology Research Groupen
dc.description.statusPeer revieweden

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