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Author |
Joliet F. |
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Title |
L'En-vert du Grand Blanc
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Conference - National - Communication |
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Year |
2011 |
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1043 |
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Bachelor's thesis |
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yes |
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3361 |
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Author |
Antomarchi V. |
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Conference - International - Article with Reading Comitee |
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2011 |
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1043 |
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Bachelor's thesis |
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yes |
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3442 |
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Author |
Lalouette L, Williams C, Cottin M, Sinclair B, Renault D, |
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Title |
Thermal biology of the alien ground beetle Merizodus soledadinus introduced to the Kerguelen Islands
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Journal Article |
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Year |
2011 |
Publication |
Polar Biology |
Abbreviated Journal |
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Pages |
1-9 |
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Keywords |
Biomedical and Life Sciences, |
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Programme |
136 |
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Thesis |
Bachelor's thesis |
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Publisher |
Springer Berlin / Heidelberg |
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0722-4060 |
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yes |
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3443 |
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Author |
Durand G, Gagliardini O, Favier L, Zwinger T, le Meur E, |
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Title |
Impact of bedrock description on modeling ice sheet dynamics
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Journal Article |
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Year |
2011 |
Publication |
Geophys. Res. Lett. |
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Volume |
38 |
Issue |
20 |
Pages |
L20501- |
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Keywords |
DEM, bedrock, ice sheet, 0726 Cryosphere: Ice sheets, 0774 Cryosphere: Dynamics, 0798 Cryosphere: Modeling (1952, 4316), |
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Abstract |
Recent glaciological surveys have revealed a significant increase of ice discharge from polar ice caps into the ocean. In parallel, ice flow models have been greatly improved to better reproduce current changes and forecast the future behavior of ice sheets. For these models, surface topography and bedrock elevation are crucial input parameters that largely control the dynamics and the ensuing overall mass balance of the ice sheet. For obvious reasons of inaccessibility, only sparse and uneven bedrock elevation data is available. This raw data is processed to produce Digital Elevation Models (DEMs) on a regular 5 km grid. These DEMs are used to constrain the basal boundary conditions of all ice sheet models. Here, by using a full-Stokes finite element code, we examine the sensitivity of an ice flow model to the accuracy of the bedrock description. In the context of short-term ice sheet forecast, we show that in coastal regions, the bedrock elevation should be known at a resolution of the order of one kilometer. Conversely, a crude description of the bedrock in the interior of the continent does not affect modeling of the ice outflow into the ocean. These findings clearly indicate that coastal regions should be prioritized during future geophysical surveys. They also indicate that a paradigm shift is required to change the current design of DEMs describing the bedrock below the ice sheets: they must give users the opportunity to incorporate high-resolution bedrock elevation data in regions of interest.
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Programme |
1053 |
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Thesis |
Bachelor's thesis |
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Publisher |
AGU |
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0094-8276 |
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yes |
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3452 |
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Author |
A.S Drouet, G. Durand, E. Le Meur, F. Gillet-Chaulet, M. Sacchettini |
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Title |
A New Design for Digital Elevation Models of Bedrock underlying Ice Sheets,International Symposium on interactions of Ice Sheets and Glaciers with the Ocean, La Jolla, California, USA, 5-10 June 2011. |
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Conference - International - Poster |
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Year |
2011 |
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Programme |
1053 |
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Thesis |
Bachelor's thesis |
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yes |
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Serial |
3459 |
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Author |
Battistelli E, others, |
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Title |
QUBIC: The QU Bolometric Interferometer for Cosmology
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Type |
Journal Article |
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Year |
2011 |
Publication |
Astropart.Phys. |
Abbreviated Journal |
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Volume |
34 |
Issue |
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Pages |
705-716 |
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Programme |
915 |
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Thesis |
Bachelor's thesis |
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ISSN |
0927-6505 |
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yes |
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3480 |
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Title |
Adverse foraging conditions may impact body mass and survival of a high Arctic seabird
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Type |
Journal Article |
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Year |
2011 |
Publication |
Oecologia |
Abbreviated Journal |
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Volume |
167 |
Issue |
1 |
Pages |
49-59 |
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Keywords |
Biomedical and Life Sciences, |
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Abstract |
Tradeoffs between current reproduction and future survival are widely recognized, but may only occur when food is limited: when foraging conditions are favorable, parents may be able to reproduce without compromising their own survival. We investigated these tradeoffs in the little auk ( Alle alle ), a small seabird with a single-egg clutch. During 20052007, we examined the relationship between body mass and survival of birds breeding under contrasting foraging conditions at two Arctic colonies. We used corticosterone levels of breeding adults as a physiological indicator of the foraging conditions they encountered during each reproductive season. We found that when foraging conditions were relatively poor (as reflected in elevated levels of corticosterone), parents ended the reproductive season with low body mass and suffered increased post-breeding mortality. A positive relationship between body mass and post-breeding survival was found in one study year; light birds incurred higher survival costs than heavy birds. The results of this study suggest that reproducing under poor foraging conditions may affect the post-breeding survival of long-lived little auks. They also have important demographic implications because even a small change in adult survival may have a large effect on populations of long-lived species. |
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Programme |
388 |
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Thesis |
Bachelor's thesis |
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Publisher |
Springer Berlin / Heidelberg |
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0029-8549 |
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yes |
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Serial |
3509 |
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Author |
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Title |
Combining stable isotope analyses and geolocation to reveal kittiwake migration
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Type |
Journal Article |
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Year |
2011 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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Volume |
435 |
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Pages |
251-261 |
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Programme |
333;388 |
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Thesis |
Bachelor's thesis |
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ISSN |
0171-8630 |
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yes |
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Serial |
3510 |
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Author |
Mosbech Anders, Johansen Kasper, Bech Nikolaj, Lyngs Peter, Harding Ann, Egevang Carsten, Phillips Richard, Fort Jerome, |
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Title |
Inter-breeding movements of little auks Alle alle reveal a key post-breeding staging area in the Greenland Sea
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Journal Article |
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Year |
2012 |
Publication |
Polar Biology |
Abbreviated Journal |
Polar Biol. |
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Volume |
35 |
Issue |
2 |
Pages |
305-311 |
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Keywords |
Biomedical and Life Sciences, |
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Abstract |
Seabirds are important components in marine ecosystems. However, knowledge of their ecology and spatial distribution during the non-breeding season is poor. More investigations during this critical period are required urgently, as marine environments are expected to be profoundly affected by climate change and human activities, with both direct and indirect consequences for marine top predators. Here, we studied the distribution of little auks ( Alle alle ), one of the most abundant seabird species worldwide. We found that after the breeding season, birds from East Greenland quickly travelled north-east to stay for several weeks within a restricted area in the Greenland Sea. Activity patterns indicated that flying behaviour was much reduced during this period, suggesting that this is the primary moulting region for little auks. Birds then performed a southerly migration to overwinter off Newfoundland. These preliminary results provide important information for the conservation of this species and emphasise the need for further studies at a larger spatial scale. |
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Programme |
388 |
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Thesis |
Bachelor's thesis |
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Publisher |
Springer Berlin / Heidelberg |
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ISSN |
0722-4060 |
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yes |
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Call Number |
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Serial |
3513 |
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Author |
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Title |
An individual and a sex odor signature in kittiwakes? Study of the semiochemical composition of preen secretion and preen down feathers
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Type |
Journal Article |
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Year |
2011 |
Publication |
Naturwissenschaften |
Abbreviated Journal |
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Volume |
98 |
Issue |
7 |
Pages |
615-624 |
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Keywords |
Biomedical and Life Sciences, |
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Abstract |
The importance of olfaction in birds social behavior has long been denied. Avian chemical signaling has thus been relatively unexplored. The black-legged kittiwake provides a particularly appropriate model for investigating this topic. Kittiwakes preferentially mate with genetically dissimilar individuals, but the cues used to assess genetic characteristics remain unknown. As in other vertebrates, their body odors may carry individual and sexual signatures thus potentially reliably signaling individual genetic makeup. Here, we test whether body odors in preen gland secretion and preen down feathers in kittiwakes may provide a sex and an individual signature. Using gas chromatography and mass spectrometry, we found that male and female odors differ quantitatively, suggesting that scent may be one of the multiple cues used by birds to discriminate between sexes. We further detected an individual signature in the volatile and nonvolatile fractions of preen secretion and preen down feathers. These results suggest that kittiwake body odor may function as a signal associated with mate recognition. It further suggests that preen odor might broadcast the genetic makeup of individuals, and could be used in mate choice to assess the genetic compatibility of potential mates. |
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Programme |
1162 |
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Thesis |
Bachelor's thesis |
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Publisher |
Springer Berlin / Heidelberg |
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0028-1042 |
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yes |
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Call Number |
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Serial |
3514 |
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