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Julien Collet, Samantha C. Patrick, Henri Weimerskirch. (2017). Behavioral responses to encounter of fishing boats in wandering albatrosses (Vol. 7).
Abstract: Animals are attracted to human food subsidies worldwide. The behavioral response of individuals to these resources is rarely described in detail, beyond chances of encounters. Seabirds for instance scavenge in large numbers at fishing boats, triggering crucial conservation issues, but how the response to boats varies across encounters is poorly known. Here we examine the behavioral response of wandering albatrosses (Diomedea exulans), equipped with GPS tags, to longline fishing boats operating near their colony for which we had access to vessel monitoring system data. We distinguish between encounters (flying within 30 km of a boat) and attendance behavior (sitting on the sea within 3 km of a boat), and examine factors affecting each. In particular, we test hypotheses that the response to encountered boats should vary with sex and age in this long-lived dimorphic species. Among the 60% trips that encountered boats at least once, 80% of them contained attendance (but attendance followed only 60% of each single encounter). Birds were more attracted and remained attending longer when boats were hauling lines, despite the measures enforced by this fleet to limit food availability during operations. Sex and age of birds had low influence on the response to boats, except the year when fewer boats came fishing in the area, and younger birds were attending further from boats compared to older birds. Net mass gain of birds was similar across sex and not affected by time spent attending boats. Our results indicate albatrosses extensively attend this fishery, with no clear advantages, questioning impacts on foraging time budgets. Factors responsible for sex foraging segregation at larger scale seem not to operate at this fleet near the colony and are not consistent with predictions of optimal foraging theory on potential individual dominance asymmetries. This approach complements studies of large-scale overlap of animals with human subsidies.
Keywords: competition fisheries foraging decisions movement ecology seabirds vessel monitoring system
Programme: 109
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Laparie M, Bical R, Larvor V, Vernon P, Frenot Y, Renault D, . (2012). Habitat phenotyping of two sub-Antarctic flies by metabolic fingerprinting: Evidence for a species outside its home?
. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 162(4), 406–412.
Abstract: Metabolic fingerprinting can elucidate rearrangements of metabolic networks in organisms exposed to various environmental conditions. Maintenance of organismal performance occurs by alterations in metabolic fluxes and pathways, resulting in habitat-specific metabolic signatures. Several insects of sub-Antarctic Islands, including the wingless flies Anatalanta aptera and Calycopteryx moseleyi, are exposed to saline organic matter accumulated along littoral margins. However, C. moseleyi has long been considered restricted to a habitat of lower salinity, the Kerguelen cabbage. High C. moseleyi densities identified in saline decaying seaweeds are intriguing, and may involve osmoregulatory adjustments including accumulation of osmoprotectants. In the present work, we examined quantitative metabotypes (metabolic phenotypes) among wild C. moseleyi individuals from seaweeds versus non-saline Kerguelen cabbages. They were compared to metabotypes from wild A. aptera, a common fly on seaweed. Statistical procedures designed to magnify between-class differences failed to clearly separate C. moseleyi metabotypes from cabbage and seaweed, despite contrasted morphotypes, diets, and salinities. A. aptera exhibited higher glycerol, inositol, trehalose, and other osmoprotectants concentrations that may enhance its performance under saline environments. Seaweed may represent a secondary niche in C. moseleyi, promoted by the marked reduction in Kerguelen cabbage frequency subsequent to climate change, and herbivorous pressures caused by rabbit invasion.
Keywords: Compatible solute, Global changes, Insect, Kerguelen Islands, Osmoregulation, Range expansion, Salinity, Stress,
Programme: 136
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. (2021). Six pelagic seabird species of the North Atlantic engage in a fly-and-forage strategy during their migratory movements (Vol. 676).
Keywords: Common murres Dovekies Light-level geolocation Migration strategies Non-breeding movements Thick-billed murres
Programme: 330
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Elaume Marc, Beaman Robin J, Griffiths Huw J, Best Ben, Riddle Martin J, Wadley Victoria, Rintoul Stephen R, Hemery Lenag G, Amziane Nadia, . (2011). Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adlie and George V shelf, East Antarctica
. Deep Sea Res. Part II Top. Stud. Oceanogr., 58(1-2), 163–169.
Keywords: Comatulid, Near-bottom current, Antarctica, Terre Adlie,
Programme: 1124
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Gauthier Gilles, Milot Emmanuel, Weimerskirch Henri, . (2010). Small-scale dispersal and survival in a long-lived seabird, the wandering albatross
. Journal of Animal Ecology, 79(4), 879–887.
Keywords: colony size, conspecific attraction, fidelity to colony, philopatry,
Programme: 109
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C. Michelot, A. Kato, T. Raclot, K. Shiomi, P. Goulet, P. Bustamante, Y. Ropert-Coudert. (2020). (Vol. 640).
Keywords: Colony Diet GPS Incubation trip Pygoscelis adeliae Sea-ice edge Stable isotopes
Programme: 1091
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Dietrich Muriel, Kempf Florent, Boulinier Thierry, McCoy Karen D, . (2014). Tracing the colonization and diversification of the worldwide seabird ectoparasite Ixodes uriae
. Molecular Ecology, 23(13), 3292–3305.
Keywords: colonization, cytochrome c oxidase subunit III (COIII), dispersal, hard ticks, microsatellites, vectorborne infectious agents,
Programme: 333
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. (2014). Stress hormones in relation to breeding status and territory location in colonial king penguin: a role for social density?
. Oecologia, 175(3), 763–772-.
Abstract: Because glucocorticoid (stress) hormones fundamentally affect various aspects of the behaviour, life history and fitness of free-living vertebrates, there is a need to understand the environmental factors shaping their variation in natural populations. Here, we examined whether spatial heterogeneity in breeding territory quality affected the stress of colonial king penguin (Aptenodytes patagonicus). We assessed the effects of local climate (wind, sun and ambient temperature) and social conditions (number of neighbours, distance to neighbours) on the baseline levels of plasma total corticosterone (CORT) in 77 incubating and 42 chick-brooding birds, breeding on territories of central or peripheral colony location. We also assessed the oxidative stress status of a sub-sample of central vs. peripheral chick-brooders to determine whether chronic stress arose from breeding on specific territories. On average, we found that brooders had 55 % higher CORT levels than incubators. Regardless of breeding status, central birds experienced greater social density (higher number of neighbours, shorter distance between territories) and had higher CORT levels than peripheral birds. Increasing social density positively explained 40 % of the variation in CORT levels of both incubators and brooders, but the effect was more pronounced in brooders. In contrast, climate was similar among breeding territories and did not significantly affect the CORT levels of breeding birds. In brooders, oxidative stress status was not affected by local density or weather conditions. These results highlight that local heterogeneity in breeding (including social) conditions may strongly affect the stress levels of breeding seabirds. The fitness consequences of such variation remain to be investigated.
Keywords: Coloniality, Corticosterone, Crowding, Population density, Glucocorticoids, Oxidative stress, Seabird, Stress, Territory location,
Programme: 119
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Thierry Boulinier. (2023). Avian influenza spread and seabird movements between colonies (Vol. 38). Bachelor's thesis, , .
Keywords: colonial breeding foraging HPAI H5N1 migration movement ecology prospecting spatial disease dynamics
Programme: 333,1151
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. (2021). The story of endurance: Biogeography and the evolutionary history of four Holarctic butterflies with different habitat requirements (Vol. 48).
Keywords: COI Ef-1? insect Lepidoptera mammoth steppe Pleistocene Quaternary RpS5 species distribution modelling
Programme: 1036
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