| Records |
| Author |
Agnès Baltzer, Marine Bourriquen, Jérôme Fournier-Sowinski, Denis Mercier, S. Costa, Florian Tolle, Eric Bernard, Maria Jensen |
| Title |
Evolution of prodeltas: a print of glacier melting processes |
Type |
Peer-reviewed symposium |
| Year |
2017 |
Publication |
Svalbard Science Conference 2017, 6-8 November 2017, Scandic Fornebu, Oslo, Norway |
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1223 |
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Approved |
yes |
| Call Number |
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Serial  |
8751 |
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| Author |
Lissa Gourillon |
| Title |
Evolution des deltas et prodeltas du Lovenbreen depuis 2009 |
Type |
Master 1 |
| Year |
2023 |
Publication |
Etudiante d'intechmer- stage de 5 mois- encadrante : a. baltzer |
Abbreviated Journal |
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Pages |
65 p |
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1223 |
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Approved |
yes |
| Call Number |
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Serial |
8750 |
| Permanent link to this record |
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| Author |
Fillion D., Dominé F., Couture Rm |
| Title |
Identification de composés organiques volatils issus de la photochimie de la matière organique dans les lacs nordiques |
Type |
Peer-reviewed symposium |
| Year |
2022 |
Publication |
Sentinel north 2022 scientific meeting, 25-27 october, québec, canada |
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1042 |
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Approved |
yes |
| Call Number |
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Serial |
8749 |
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| Author |
Félix Lévesque-Desrosiers, William Bonilla, Florent Domine, Simon Thibault |
| Title |
Autonomous Optical Sensor to Study the Evolution of Snow Density in Polar Environment |
Type |
Peer-reviewed symposium |
| Year |
2022 |
Publication |
Technical digest series |
Abbreviated Journal |
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| Volume |
Proceedings of Imaging and Applied Optics Congress |
Issue |
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| Abstract |
A system to study the evolution of snow density is presented here with an emphasis on the system itself and on the efforts to make a robust system for harsh environments. The metric to deduce the density of the snow is the measurement of the concentration of ambient air oxygen using a tunable diode laser spectroscopy technique: the first harmonic phase angle wavelength modulation spectroscopy. For greater robustness, the system is equipped with an embedded calibration system and is built for a smart power consumption. |
| Programme |
1042 |
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Approved |
yes |
| Call Number |
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Serial |
8748 |
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| Author |
Antoine, A. |
| Title |
Beneath the Antarctic sea-ice: Fine-scale analysis of Weddell seal (Leptonychotes weddellii, Lesson 1826) behaviour and predator prey interactions, using micro-sonar data and video recordings in Terre Adélie |
Type |
Master 2 |
| Year |
2022 |
Publication |
Sorbonne université |
Abbreviated Journal |
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Issue |
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Pages |
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| Abstract |
The sea-ice zone constitutes the breeding and foraging habitat of large populations of ice-based species, pointing at its far-reaching ecological importance. Given its sensitivity to global warming, there is an urgent need for determining how predators use their environment, to understand and predict their response to climate variability. New perspectives are offered by miniature animal-borne sensors: in 2019, 3 sonar tags were deployed on lactating female Weddell seals for 7 days in Terre Adélie to study 3D animal movement and fine-scale predator-prey interactions. Lactating females demonstrated central-place foraging strategy, with restricted foraging area (3-6 km) and mostly benthic dives (97% of dives, visualising the seafloor on echograms). Their foraging effort was constrained by the presence of their pup: females spent most of their time hauling out (77% of overall recordings). The time spent underwater was mostly dedicated to diving (>5m) (1.36 on 7days, 854 dives recorded), as opposed to shallower under ice activities (<5m) (0.3 days). A total of 331 prey capture attempts (PrCA) were recorded, using tri-axial acceleration data, of which 125 prey (4.7 ± 1.5 cm on average) were identified by the sonar on 78 dives (4.24 ± 3.99 PrCA/dive). All PCA occur on the seafloor, at shallower depth than usual Weddell seal records (88 ± 30 m). Lactation is therefore a period of physiological stress, with foraging limited by pup compared with other parts of the life cycle. Using functional principal component analysis and model-based clustering on high resolution dive data, we found that PrCAs occur mostly in 2 of the 5 dive shape clusters. Foraging dives are characterised by W or V shape and high sinuosity, at the scale of the dive (W shapes) or during the ascent phase (V shapes). During the approach phase, seals constantly scan the area by regularly moving their head left to right, suggesting opportunistic behaviour. Shallow phase behaviour was studied using video recordings (2h recorded per seal). Seals spent most of their time interacting with their pup (33%) and
hauling-out (42%). Most mother-pup interactions were on sea-ice (71%), as opposed to underwater (29%). The results suggest lactating females’ energy budget changes, with lactation being a period of physiological stress. This period of feeding pressure might put them at higher risk regarding adaptation to environmental variability. |
| Programme |
1182 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8747 |
| Permanent link to this record |
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| Author |
Antoine A., Johnson M.; Labrousse S., Goulet P., Chevallay M., Laborie B., Picard B., Guinet C., Nerini D., Charrassin J.-b., Heerah K. |
| Title |
Beneath the Antarctic sea-ice: Fine-scale analysis of Weddell seal behavior and predator-prey interactions, using micro-sonar data in Terre Adélie. |
Type |
Peer-reviewed symposium |
| Year |
2023 |
Publication |
Scientific commitee on antarctic research symposium 2023, christchurch, new zealand |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Keywords |
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| Abstract |
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| Programme |
1182 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8746 |
| Permanent link to this record |
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| Author |
Adélie Antoine, Sara Labrousse, Pauline Goulet, Mathilde Chevallay, Joris Laborie, Baptiste Picard, Christophe Guinet, David Nerini, Jean-Benoît Charrassin, Karine Heerah |
| Title |
Beneath the Antarctic sea-ice: Fine-scale analysis of Weddell seal (Leptonychotes weddellii) behavior and predator–prey interactions, using micro-sonar data in Terre Adélie |
Type |
Journal |
| Year |
2023 |
Publication |
Ecology and Evolution |
Abbreviated Journal |
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| Volume |
13 |
Issue |
12 |
Pages |
e10796 |
| Keywords |
bio-logging diving foraging behavior predator–prey interaction sonar tags Weddell seal |
| Abstract |
Lactation is the most energy-demanding event in mammals' reproduction. In pinnipeds, females are the only food providers to the young and have developed numerous behavioral and physiological lactation strategies, from capital-breeding to income-breeding. Lactating females' fine-scale foraging strategy, and precise understanding of how females supplement their pup's needs as well as their own are important to understand the species' ecology and energetic balance. Polar pinnipeds, inhabiting extreme environments, are sensitive to climate change and variability, understanding their constraints and foraging strategy during lactation is therefore important. In 2019, three sonar tags were deployed on lactating Weddell seals in Terre Adélie (East Antarctica) for 7 days, to study fine-scale predator–prey interactions. Feeding activity was mostly benthic, reduced, central-placed, and spatially limited. Females spent most of their time hauled-out. A total of 331 prey capture attempts (PrCAs) were recorded using triaxial acceleration data, with 125 prey identified on echograms (5 cm, acoustic size). All PrCAs occurred on the seafloor, shallower than usual records (mean depth of 88 m, vs 280 m after their molt). We also found that they only fed in three of the five identified dive shapes, during the ascent or throughout the dive. Half of the prey were reactive to the seal's approach, either leaving the seafloor, or escaping just above the seafloor, suggesting that the seals hunt by chasing them from the seabed. Seals continuously scanned the area during the approach phase, evoking opportunistic foraging. Our results provide additional evidence that Weddell seal forage during lactation, displaying a mix of capital-breeding and income-breeding strategies during this period of physiological stress. This work sheds light on previously unexplored aspects of their foraging behavior, such as shallow water environments, targeting benthic prey, generally focusing on single prey rather than schools, and evidence of visual scanning through observed head movements. |
| Programme |
1182 |
| Campaign |
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ISBN |
2045-7758 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8745 |
| Permanent link to this record |
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| Author |
Mojtahid M., Jouini A., Howa H., Lansard B., Michel E., Peron O., Baltzer A., Nardelli M-p |
| Title |
Benthic foraminiferal dissolution index for marine sediments in the Svalabard (Storfjorden) |
Type |
Peer-reviewed symposium |
| Year |
2018 |
Publication |
Arctic Frontiers 2018, Connecting the Arctic, 23-25 January 2018, Tromso, Norway |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Keywords |
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| Abstract |
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| Programme |
1223 |
| Campaign |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8744 |
| Permanent link to this record |
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| Author |
Biette M., baltzer A., Mercier D., Decaulne A. |
| Title |
Les réponses des environnements arctiques au retrait glaciaire |
Type |
Peer-reviewed symposium |
| Year |
2019 |
Publication |
Arctic week, 9-13 december 2019, paris, france |
Abbreviated Journal |
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Issue |
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Pages |
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| Programme |
1223 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8743 |
| Permanent link to this record |
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| Author |
Delmotte M., Coulon A., Ramonet M., Gest L., Marquestaut N., Mekies D., Hazan L, Lopez M., Kouyaté M., Tulet P. |
| Title |
Greenhouse gases measurements in Southern Ocean on board the Marion Dufresne |
Type |
Peer-reviewed symposium |
| Year |
2022 |
Publication |
GGMT-2022 meeting |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Abstract |
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| Programme |
416 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8742 |
| Permanent link to this record |
