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Lenourry L. (2023). Adélie penguin (Pygoscelis adeliae) colony structuration in space and time: identifying selective pressures that shape colonial reproductive strategies.
Abstract: Cosupervision: Bonadonna & Le Bohec
Programme: 137
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Wienecke B.C., Lawless R., Rodary D., Bost C.A., Thomson R., Pauly T., Robertson G., Kerry K.R. & Le Maho Y. (2000). Adélie penguin foraging behaviour and krill abundance along the Wilkes and Adélie land coasts, Antarctica. Deep Sea Res. Part II Top. Stud. Oceanogr., 47, 2573–2587.
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Beaulieu M., Le Maho Y. & Ancel A. (2008). Adélie penguin offspring take the rap for their instrumented parents..
Abstract: “Third International Bio-logging Science Symposium”, Pacific Grove (Californie, USA), 1-5 septembre.
Programme: 137
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Caccavo Ja, Raclot T, Poupart T, Ropert-coudert Y, Angelier F . (2018). Adélie penguin telomeres: eco-indicators of environmental stress? Bachelor's thesis, , .
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Candice Michelot, Akiko Kato, Thierry Raclot, Yan Ropert-Coudert. (2021). Adélie penguins foraging consistency and site fidelity are conditioned by breeding status and environmental conditions (Vol. 16).
Abstract: There is a growing interest in studying consistency and site fidelity of individuals to assess, respectively, how individual behaviour shapes the population response to environmental changes, and to highlight the critical habitats needed by species. In Antarctica, the foraging activity of central place foragers like Adélie penguins (Pygoscelis adeliae) is constrained by the sea-ice cover during the breeding season. We estimated the population-level repeatability in foraging trip parameters and sea-ice conditions encountered by birds across successive trips over several years, and we examined their foraging site fidelity linked to sea-ice concentrations throughout the chick-rearing season. Penguins’ foraging activity was repeatable despite varying annual sea-ice conditions. Birds’ site fidelity is constrained by both sea-ice conditions around the colony that limit movements and resources availability, and also behavioural repeatability of individuals driven by phenological constraints. Adélie penguins favoured sea-ice concentrations between 20–30%, as these facilitate access to open water while opening multiple patches for exploration in restricted areas in case of prey depletion. When the sea-ice concentration became greater than 30%, foraging site fidelity decreased and showed higher variability, while it increased again after 60%. Between two trips, the foraging site fidelity remained high when sea-ice concentration changed by ± 10% but showed greater variability when sea-ice concentrations differed on a larger range. In summary, Adélie penguins specialize their foraging behaviour during chick-rearing according to sea-ice conditions to enhance their reproductive success. The balance between being consistent under favourable environmental conditions vs. being flexible under more challenging conditions may be key to improving foraging efficiency and reproductive success to face fast environmental changes.
Keywords: Animal behavior Animal sexual behavior Animal sociality Birds Foraging Nesting habits Penguins Reproductive success
Programme: 1091
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Michelot C, Kato A, Raclot T, Ropert-coudert Y . (2018). Adélie penguins foraging strategies variation according to sea-ice condition : a multi-year analysis. Bachelor's thesis, , .
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Ropert-coudert Y, Raclot T, Shiomi K, Kato A . (2017). Adélie penguins in Terre Adélie need active protection following 2 complete breeding failure over the past 4 years . Bachelor's thesis, , .
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Jean-Baptiste Thiebot, Yan Ropert-Coudert, Thierry Raclot, Timothée Poupart, Akiko Kato, Akinori Takahashi. (2019). Adélie penguins’ extensive seasonal migration supports dynamic Marine Protected Area planning in Antarctica (Vol. 109).
Abstract: Spatiotemporal dynamics of ecosystems can challenge the pertinence of Marine Protected Area (MPA) planning. Seasonal environmental changes are extreme in polar regions, however MPA planning in East Antarctica relies mostly on species' summer distribution only. Thirteen Adélie penguins were tracked from Ile des Pétrels (Terre Adélie), and their seasonal distribution and behaviour were compared to the proposed “D'Urville Sea-Mertz” MPA. During the phase of high food-demand preceding moult, penguins used mostly (68.4%) this proposed area. However, following autumnal sea ice extension, penguins migrated north-westwards: overall, 73% of their locations were outside the MPA proposal, and this was up to >99% during winter (in July), the season when penguins maximized their dive depth and time (August and September, respectively). This study thus supports the proposal of implementing a “krill no-take zone” policy in this MPA, in line with the pre-moult foraging of these krill predators in this area. Further protection of the year-round habitats of migratory Adélie penguins could be achieved by inter-connecting the East Antarctic MPA proposals along the ice edge during winter, thereby mirroring the ecosystem's seasonal dynamics.
Keywords: Geolocation (GLS) Marine spatial planning Sea ice Southern ocean Winter
Programme: 1091
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Georlette D., Blaise V., Bouillenne F., Damien B., Thorbjarnardottir S.H., Depiereux E. Gerday C., Uverski V.N. & Feller G. (2004). Adenylation-dependent conformation and unfolding pathways of the NAD+-dependent DNA ligase from the thermophile Thermus scotoductus. Biophys. J., 86, 1089–1104.
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Blaise V., Georlette D., Bouillenne F., Damien B., Thorbjarnardorrir H., Depierreux E., Gerday C., Uversky N. and Feller G. (2003). Adenylation-dependent conformation and unfolding patways of the NAD+-dependent DNA ligase from the hyperthermophile Thermus scotoductus..
Abstract: Bioforum 2003. Liège, Belgique
Programme: 193
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