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Rolland V., Barbraud C., Weimerskirch H. (2009). Assessing the impact of fisheries, climate and disease on the dynamics of the Indian yellow-nosed Albatross. Biol. Conserv., 142, 1084–1095.
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Rolland V., Nevoux M., Barbraud C., Weimerskirch H. (2009). Respective impact of climate and fisheries on the growth of an albatross population. ECOLOGICAL APPLICATIONS, 19, 1336–1346.
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Jenouvrier S., Caswell H., Barbraud C., Holland M., Str Oelig VE J., Weimerskirch H. (2009). Demographic models and IPCC climate projections predict the decline of an emperor penguin population. Proc. Natl. Acad. Sci. U.S.A., 106, 1844–1847.
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Martin A.R., Poncet S., Barbraud C., Foster E., Fretwell P., Rothery P. (2009). The white-chinned petrel (Procellaria aequinoctialis) on South Georgia: population size, distribution and global significance. Polar Biol., 32, 655–661.
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Cook T. (2008). Ecologie des oiseaux plongeurs (Phalacrocorax spp.) : réponses écophysiologiques, comportementales et sexuelles aux variations de l'environnement..
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Rolland V. (2008). Influence des changements climatiques et des pêcheries industrielles sur la dynamique des populations d 'albatros de l'océan Austral.
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Samaran F. (2008). Analyse des signaux acoustiques d'origine biologique enregistrés dans l'Océan Indien : implication dans le recensement et le suivi des mouvements saisonniers des cétacés.
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Bost, C.A., Thiebot, J.B., Pinaud, D., Cherel, Y., Trathan, P.N. (2009). Where do penguins go during the inter-breeding period? Using geolocation to track their winter dispersion. Biol. Lett., 5, 473–476.
Abstract: Although penguins are key marine predators from the Southern Ocean, their migratory behavior during the inter-nesting period remains essentially unknown. Here, we report for the first time the winter foraging movements and feeding habits of a penguin species by using geolocation sensors fitted on penguins with a new attachment method. We focused on the macaroni penguin Eudyptes chrysolophus at Kerguelen, the single largest consumer of marine prey among all seabirds. Overall, macaroni penguins performed very long winter trips, remaining at sea during ~6 months within the limits of the Southern Ocean. They departed from Kerguelen in an eastward direction and distributed widely, over >3.106 km². The penguins spent most of their time in a previously unrecognized foraging area, i.e. a narrow latitudinal band (47-49°S) within the central Indian Ocean (70°-110°E), corresponding oceanographically to the Polar Frontal Zone. There, their blood isotopic niche indicated that macaroni penguins preyed mainly upon crustaceans, but not on Antarctic krill Euphausia superba that does not occur at these northern latitudes. Such winter information is a crucial step for a better integrative approach for the conservation of this species whose world population is known to be declining.
Programme: 394
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Bonadonna, F. Caro, S Brooke, M. (2009). Olfactory sex recognition investigated in Antarctic prions. PLOS ONE, 4, e4148.
Abstract: Chemical signals can yield information about an animal such as its identity, social status or sex. Such signals have rarely been considered in birds, but recent results have shown that chemical signals are actually used by different bird species to find food and to recognize their home and est. This is particularly true in petrels whose olfactory anatomy is among the most developed in birds. Recently, we have demonstrated that Antarctic prions, Pachyptila desolata, are also able to recognize and follow the odour of their partner in a Y-maze. However, the experimental protocol left unclear whether this choice reflected an olfactory recognition of a particular individual (i.e. partner) or a more general sex recognition mechanism. To test this second hypothesis, male and female birds’ odours were presented simultaneously to 54 Antarctic prions in a Y-maze. Results showed random behaviour by the tested bird, independent of its sex or reproductive status. Present results do not support the possibility that Antarctic prions can distinguish the sex of a conspecific through its odour but indirectly support the hypothesis that they can distinguish individual odours.
Programme: 354
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Mardon, J Bonadonna, F. (2009). Atypical homing or self-odour avoidance? Blue petrels ( Halobaena caerulea ) are attracted to their mate’s odour but avoid their own. Behav. Ecol. Sociobiol. (Print), 63, 537–542.
Abstract: Among procellariiform seabirds, many burrowing petrels show good olfactory abilities especially in recognising their nest. In particular, it has been reported that Antarctic prions (Pachyptila desolata) discriminate their own and their mate’s odours and, in Y-maze experiments, prefer the odour of a conspecific bird to their own. While traditionally examined from the perspective of homing mechanisms, these recent results have drawn attention to the possible use of chemical signals in birds’ social behaviours. Indeed, the life history of petrels suggests that a mate choice mediated by olfactory mechanisms may have evolved in this group to ensure genetic compatibility. This study was undertaken to validate and extend results obtained on petrels’ olfactory discrimination capabilities. Following the Y-maze experiment protocol, blue petrels (Halobaena caerulea) were offered three different choices: (1) mate versus conspecific’s odour, (2) own versus mate’s odour and (3) own versus conspecific’s odour. We discovered that birds prefer the odour of their mate not only when presented against conspecific’s odour but also against their own. We further verified that blue petrels also avoid their own odour when presented against conspecific’s odour. Our results confirm that olfactory discrimination in burrowing petrels goes beyond selfrecognition and that self-odour avoidance may be widespread. We use two mutually non-exclusive behavioural frameworks for the interpretation of our results, homing and mate choice, and explain why homing mechanisms cannot account for all of our observations. This study opens the door to further research on olfactory mechanisms that, in petrels, might mediate individual recognition and mate choice.
Programme: 354
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