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Thomas Merkling. (2016). Including past reproductive history to improve sex allocation studies? .
Abstract: 16th congress of ISBE (International Society for Behavioral Ecology); Exeter, UK
Programme: 1162
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Merkling T*, Perrot C*, Helfenstein F, Ferdy J-B, Gaillard L, Lefol E, Voisin E, Hatch SA, Danchin E & Blanchard P (* co first authors). (2016). Does parent-offspring conflict shape the relationship between environmental conditions and maternal effects? An experimental test. Ecology and Evolution, 6(11), 3699–3710.
Abstract: Maternal effects occur when the mother's phenotype influences her offspring's phenotype. In birds, differential allocation in egg yolk components can allow mothers to compensate for the competitive disadvantage of junior chicks. We hypothesize that the parent–older chick conflict peaks at intermediate conditions: parents benefit from the younger chick(s) survival, but its death benefits the older chick in terms of growth and survival. We thus expect maternal compensation to follow a bell-shaped pattern in relation to environmental conditions. We studied a black-legged kittiwake (Rissa tridactyla) population where previous results revealed increased allocation of yolk testosterone in younger as compared to older chicks in intermediate conditions, in line with our theoretical framework. We therefore predicted a maternally induced increase in aggressiveness, growth, and survival for younger chicks born in intermediate environmental conditions. Controlling for parental effects and chick sex, we manipulated food availability before egg laying to create a situation with intermediate (Unfed group) and good (Fed group) environmental conditions. Within each feeding treatment, we further created experimental broods where the natural hatching order was reversed to maximize our chances to observe an effect of feeding treatment on the younger chicks' aggressiveness. As predicted, we found that chick aggressiveness was higher in younger chicks born from the Unfed group (i.e., in intermediate environmental conditions), but only when they were put in a senior position, in reversed broods. Predictions on growth and survival were not confirmed. Mothers thus seem to favor the competitiveness of their younger chick in intermediate conditions via egg yolk components, but our study also suggests that hatching asynchrony need to be small for maternal compensation to be efficient. We emphasize the need for further studies investigating other chick behaviors (e.g., begging) and focusing on the relative role of different yolk components in shaping parent–offspring conflict over sibling competition.
Programme: 1162
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Berne, A., J. Grazioli, C. Genthon, M. DelGuasta. (2016). Multi-sensor observation of precipitation in a coastal region of Antarctica.
Abstract: EGU 2016 General Assembly, Vienna, Austria, 17-22 April.
Programme: 1143
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Madeleine, J.-B., H. Gallée, E. Vignon, C. Genthon, G. Krinner, C. Palerme, C. Claud. (2016). Antarctic precipitation in the LMDz and MAR climate models : comparison to CloudSat retrievals and improvement of cold microphysical processes.
Abstract: ESA Living Planet Conference, Prague, Czech Republic, 9-13 May 2016
Programme: 1143
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Grazioli, J. A. Berne, C. Genthon, B. Boudevillain. (2016). Precipitation in Dumont D’Urville (Antarctica) from in-situ measurements and remote sensors. Bachelor's thesis, , .
Abstract: ESA Living Planet Conference, Prague, Czech Republic, 9-13 May 2016.
Programme: 1143
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Genthon, C.A. Berne, B. Boudevillain, C. Claud, M. del Guasta, G. Delrieu, H. Gallée, J. Grazziolli, J. Kay, Jen, G. Krinner, T. L'Ecuyer, J.-B. Madeleine, C. Palerme, N. Wood. (2016). Antarctic Precipitation : Remote Sensing from Surface and Space (APRES3).
Abstract: ESA Living Planet Conference, Prague, Czech Republic, 9-13 May 2016.
Programme: 1143
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Elie Poulin, Javier Naretto, Mathias Hüne, Sebastian Kraft, Thomas Saucède, Jean-Pierre Féral, Claudio González-Wevar. (2016). Diversification of the spiny Plunderfish Harpagifer in the Southern Ocean. VIII Southern Connection Congress 2016, 18-23th January, Punta Arenas, Chile.
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Claudio González-Wevar, Angie Díaz, Mathias Hüne, Sebastian Rosenfeld, Hamish Spencer, Thomas Saucède, Andrés Mansilla, Karin Gerard, Elie Poulin. (2016). Biogeographical patterns in southern ocean gastropods with contrasting developmental modes. VIII Southern Connection Congress 2016, 18-23th January, Punta Arenas, Chile.
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J.-P. Féral, T. Saucède, E. Poulin, C. Marschal, G. Marty, J.-C. Roca, S. Motreuil, J.-P. Beurier. (2016). PROTEKER: Implementation of an underwater observatory at the Kerguelen Islands (Southern Ocean). 2nd European Conference on Scientific Diving, , 9-11 May, Kristineberg, Sweden.
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Thomas Saucède, A Bazin, O Mathieu, J Lévêque, M-J Milloux, S Fabri-Ruiz, L Michel, C De Ridder & J-P Féral. (2016). Etude des réseaux trophiques dans les environnements côtiers des Iles Kerguelen. 5ème journées de l’OSU THETA, 28 January, Besançon, France.
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