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Laparie M, Renault D, Lebouvier M, Delattre T, . (2013). Is dispersal promoted at the invasion front? Morphological analysis of a ground beetle invading the Kerguelen Islands, Merizodus soledadinus (Coleoptera, Carabidae)
. Biol. Invasions, 15(8), 1641–1648.
Keywords: Biological invasion, Body size evolution, Developmental Biology, Dispersal syndrome, Ecology, Freshwater & Marine Ecology, Insect, Invasion succession, Plant Sciences, Sub-Antarctic islands,
Programme: 136
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. (2013). Lipid components as a measure of nutritional condition in fish larvae (Pleuragramma antarcticum) in East Antarctica
. Mar Biol, 160(4), 877–887.
Keywords: Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology,
Programme: 1142
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Chaigne Adrien, Authier Matthieu, Richard Pierre, Cherel Yves, Guinet Christophe, . (2013). Shift in foraging grounds and diet broadening during ontogeny in southern elephant seals from Kerguelen Islands
. Mar. Biol., 160(4), 977–986.
Keywords: Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology,
Programme: 109
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Thiebot Jean-Baptiste, Weimerskirch Henri, . (2013). Contrasted associations between seabirds and marine mammals across four biomes of the southern Indian Ocean
. J. Ornithol., 154(2), 441–453.
Keywords: Animal Ecology, At-sea observations, Bootstrap procedure, Evolutionary Biology, Foraging strategies, Interspecific interactions, Long-term monitoring, Marine predators, Zoology,
Programme: 109
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. (2013). Three-dimensional use of marine habitats by juvenile emperor penguins Aptenodytes forsteri during post-natal dispersal
. Antarct. Sci., 25(04), 536–544.
Keywords: Diving, foraging ecology, immaturity period, migration, seabirds, Southern Ocean, tracking,
Programme: 109,394
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Pardo Deborah, Barbraud Christophe, Weimerskirch Henri, . (2013). Females better face senescence in the wandering albatross
. Oecologia, 173(4), 1283–1294.
Abstract: Sex differences in lifespan and aging are widespread among animals. Since investment in current reproduction can have consequences on other life-history traits, the sex with the highest cost of breeding is expected to suffer from an earlier and/or stronger senescence. This has been demonstrated in polygynous species that are highly dimorphic. However in monogamous species where parental investment is similar between sexes, sex-specific differences in aging patterns of life-history traits are expected to be attenuated. Here, we examined sex and age influences on demographic traits in a very long-lived and sexually dimorphic monogamous species, the wandering albatross (Diomedea exulans). We modelled within the same model framework sex-dependent variations in aging for an array of five life-history traits: adult survival, probability of returning to the breeding colony, probability of breeding and two measures of breeding success (hatching and fledging). We show that life-history traits presented contrasted aging patterns according to sex whereas traits were all similar at young ages. Both sexes exhibited actuarial and reproductive senescence, but, as the decrease in breeding success remained similar for males and females, the survival and breeding probabilities of males were significantly more affected than females. We discuss our results in the light of the costs associated to reproduction, age-related pairing and a biased operational sex-ratio in the population leading to a pool of non-breeders of potentially lower quality and therefore more subject to death or breeding abstention. For a monogamous species with similar parental roles, the patterns observed were surprising and when placed in a gradient of observed age/sex-related variations in life-history traits, wandering albatrosses were intermediate between highly dimorphic polygynous and most monogamous species.
Keywords: Breeding probability, Breeding success, Diomedea exulans, Ecology, Plant Sciences, Seabird, Senescence, Sexual dimorphism, Survival,
Programme: 109
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. (2013). To breed or not to breed: endocrine response to mercury contamination by an Arctic seabird
. 1744-9561, 9(4).
Abstract: Mercury, a ubiquitous toxic element, is known to alter expression of sex steroids and to impair reproduction across vertebrates but the mechanisms underlying these effects are not clearly identified. We examined whether contamination by mercury predicts the probability to skip reproduction in black-legged kittiwakes (Rissa tridactyla) from Svalbard. We also manipulated the endocrine system to investigate the mechanism underlying this relationship. During the pre-laying period, we injected exogenous GnRH (gonadotropin-releasing hormone) to test the ability of the pituitary to release luteinizing hormone (LH, a key hormone for the release of sex steroids and hence breeding) in relation to mercury burden. Birds that skipped reproduction had significantly higher mercury concentration in blood than breeders. Endocrine profiles of these birds also varied based on breeding status (breeders versus non-breeders), mercury contamination and sex. Specifically, in skippers (birds that did not breed), baseline LH decreased with increasing mercury concentration in males, whereas it increased in females. GnRH-induced LH levels increased with increasing mercury concentration in both sexes. These results suggest that mercury contamination may disrupt GnRH input to the pituitary. Thus, high mercury concentration could affect the ability of long-lived birds to modulate their reproductive effort (skipping or breeding) according to ongoing environmental changes in the Arctic, thereby impacting population dynamics.
Keywords: black-legged kittiwake, GnRH challenge, intermittent breeding, luteinizing hormone, mercury,
Programme: 330
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. (2012). Integrative modelling of animal movement: incorporating in situ habitat and behavioural information for a migratory marine predator
. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON, 280, 20122262.
Keywords: animal telemetry, foraging behaviour, individual movement, oceanographic drivers of movement, spatial ecology, state-space model,
Programme: 109
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. (2013). On the iron isotope heterogeneity of lithospheric mantle xenoliths: implications for mantle metasomatism, the origin of basalts and the iron isotope composition of the Earth
. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY, 165(6), 1243–1258.
Keywords: Geology, Iron isotopes, Mantle peridotites, Melt extraction, Metasomatism, Mineralogy, Mineral Resources,
Programme: 1077
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Rosing-Asvid A, Hedeholm R, Arendt K E, Fort J, Robertson G J, . (2013). Winter diet of the little auk (Alle alle) in the Northwest Atlantic
. POLAR BIOLOGY, 36(11), 1601–1608.
Keywords: Ecology, Feeding ecology, Greenland, Krill, Microbiology, Newfoundland, Oceanography, Plant Sciences, Themisto spp, Winter diet, Zoology,
Programme: 388
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