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Type |
Journal |
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Year |
2023 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
17 |
Issue |
12 |
Pages |
5241-5254 |
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Abstract |
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Programme |
1110,1205 |
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Thesis |
Bachelor's thesis |
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ISSN |
1994-0416 |
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yes |
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Call Number |
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Serial |
8699 |
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Title |
Track and dive-based movement metrics do not predict the number of prey encountered by a marine predator |
Type |
Journal |
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Year |
2023 |
Publication |
Movement Ecology |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
3 |
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Keywords |
Accelerometry Area-restricted search Diving behavior Foraging behavior Marine predator Prey encounter events |
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Abstract |
Studying animal movement in the context of the optimal foraging theory has led to the development of simple movement metrics for inferring feeding activity. Yet, the predictive capacity of these metrics in natural environments has been given little attention, raising serious questions of the validity of these metrics. The aim of this study is to test whether simple continuous movement metrics predict feeding intensity in a marine predator, the southern elephant seal (SES; Mirounga leonine), and investigate potential factors influencing the predictive capacity of these metrics. |
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Programme |
109,1201 |
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Thesis |
Bachelor's thesis |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2051-3933 |
ISBN |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8556 |
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Author |
Taiki Adachi, Philip Lovell, James Turnbull, Mike A. Fedak, Baptiste Picard, Christophe Guinet, Martin Biuw, Theresa R. Keates, Rachel R. Holser, Daniel P. Costa, Daniel E. Crocker, Patrick J. O. Miller |
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Title |
Body condition changes at sea: Onboard calculation and telemetry of body density in diving animals |
Type |
Journal |
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Year |
2023 |
Publication |
Methods in Ecology and Evolution |
Abbreviated Journal |
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Volume |
14 |
Issue |
6 |
Pages |
1457-1474 |
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Keywords |
animal health bio-logging body density buoyancy marine mammal real-time monitoring satellite transmission |
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Abstract |
The ability of marine mammals to accumulate sufficient lipid energy reserves is vital for mammals' survival and successful reproduction. However, long-term monitoring of at-sea changes in body condition, specifically lipid stores, has only been possible in elephant seals performing prolonged drift dives (low-density lipids alter the rates of depth change while drifting). This approach has limited applicability to other species. Using hydrodynamic performance analysis during transit glides, we developed and validated a novel satellite-linked data logger that calculates real-time changes in body density (?lipid stores). As gliding is ubiquitous amongst divers, the system can assess body condition in a broad array of diving animals. The tag processes high sampling rate depth and three-axis acceleration data to identify 5 s high pitch angle glide segments at depths >100 m. Body density is estimated for each glide using gliding speed and pitch to quantify drag versus buoyancy forces acting on the gliding animal. We used tag data from 24 elephant seals (Mirounga spp.) to validate the onboard calculation of body density relative to drift rate. The new tags relayed body density estimates over 200 days and documented lipid store accumulation during migration with good correspondence between changes in body density and drift rate. Our study provided updated drag coefficient values for gliding (Cd,f = 0.03) and drifting (Cd,s = 0.12) elephant seals, both substantially lower than previous estimates. We also demonstrated post-hoc estimation of the gliding drag coefficient and body density using transmitted data, which is especially useful when drag parameters cannot be estimated with sufficient accuracy before tag deployment. Our method has the potential to advance the field of marine biology by switching the research paradigm from indirectly inferring animal body condition from foraging effort to directly measuring changes in body condition relative to foraging effort, habitat, ecological factors and anthropogenic stressors in the changing oceans. Expanding the method to account for diving air volumes will expand the system's applicability to shallower-diving (<100 m) species, facilitating real-time monitoring of body condition in a broad range of breath-hold divers. |
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Programme |
109, 1201 |
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Thesis |
Bachelor's thesis |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2041-210X |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8620 |
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| Permanent link to this record |
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Author |
Thierry Boulinier |
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Title |
Avian influenza spread and seabird movements between colonies |
Type |
Journal |
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Year |
2023 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
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Volume |
38 |
Issue |
5 |
Pages |
391-395 |
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Keywords |
colonial breeding foraging HPAI H5N1 migration movement ecology prospecting spatial disease dynamics |
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Abstract |
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Programme |
333,1151 |
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Thesis |
Bachelor's thesis |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0169-5347 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8502 |
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Author |
Antonella Tassone, Olivier Magand, Attilio Naccarato, Maria Martino, Domenico Amico, Francesca Sprovieri, Hippolyte Leuridan, Yann Bertrand, Michel Ramonet, Nicola Pirrone, Aurelien Dommergue |
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Title |
Seven-year monitoring of mercury in wet precipitation and atmosphere at the Amsterdam Island GMOS station |
Type |
Journal |
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Year |
2023 |
Publication |
Heliyon |
Abbreviated Journal |
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Volume |
9 |
Issue |
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Pages |
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Keywords |
Atmospheric pollution Atmospheric transport Mercury measurements Source identification Southern Hemisphere Wet deposition flux |
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Abstract |
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Programme |
416,1028 |
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Address |
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Thesis |
Bachelor's thesis |
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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 |
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Call Number |
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Serial |
8679 |
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Author |
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Title |
Plant consumer innovation in skuas |
Type |
Journal |
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Year |
2023 |
Publication |
Journal of Ornithology |
Abbreviated Journal |
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Volume |
164 |
Issue |
3 |
Pages |
717-719 |
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Keywords |
Animal innovation Consumer innovation Field observation Novel food Stercorarius antarcticus lonnbergi |
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Abstract |
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Programme |
109,354 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2193-7206 |
ISBN |
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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 |
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Call Number |
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Serial |
8635 |
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Author |
Joris Laborie, Matthieu Authier, Adrien Chaigne, Karine Delord, Henri Weimerskirch, Christophe Guinet |
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Title |
Estimation of total population size of southern elephant seals (Mirounga leonina) on Kerguelen and Crozet Archipelagos using very high-resolution satellite imagery |
Type |
Journal |
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Year |
2023 |
Publication |
Frontiers in Marine Science |
Abbreviated Journal |
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Volume |
10 |
Issue |
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Pages |
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Keywords |
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Abstract |
Southern elephant seals (Mirounga leonina) play a pivotal role in the Southern Ocean as wide-ranging marine predators and major prey consumers within Southern Ocean marine ecosystems. Due to their circumpolar distribution and the remoteness of their habitat, large uncertainties remain about their total population sizes. This is especially true for elephant seal populations in the French Southern Territories in the southern Indian Ocean (i.e. Crozet and Kerguelen Archipelagos) as many breeding sites are inaccessible for ground censuses. Here, we present a simple and efficient approach for estimating the total elephant seal populations of the Kerguelen and Crozet Archipelagos by using very high-resolution satellite imagery (<1m resolution). Twenty-eight satellite images taken during the breeding season to count female elephant seals in inaccessible areas were used and complemented the traditional annual ground counts in accessible areas. For Kerguelen Island sectors likely to host colonies and where no satellite images were available for the breeding season, a statistical predictive model was built to estimate the most likely number of breeding females to be present on a given beach according to its physiographic characteristics. Our results show the reliability of using very high-resolution satellite images, a relatively low-cost platform, to count pinniped populations and provide the first estimation of the total southern elephant seal population for both the Kerguelen 347,995 (s e = 4,950) and Crozet 13,065 (s e = 169) Archipelagos. The combined total represents over 35% of the global elephant seal population with the Kerguelen stock being numerically equivalent to the South Georgia stock. In addition, we re-examined the population trends since the last mid-century for Kerguelen and over the last five decades for Crozet. The demographic trends of the southern Indian Ocean populations show marked growth over the last decade (5.1% and 1.6% annual growth rate for Crozet and Kerguelen respectively), particularly on Crozet where the elephant seal population has more than tripled. |
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Programme |
109,1201 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Series Issue |
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Edition |
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ISSN |
2296-7745 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8535 |
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Author |
Bernard A., Chambodut A., Zigone D., Thore J-Y., Bes De Berc M., Fotze M.,Wardinski,I. |
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Title |
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Type |
Book Chapter |
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Year |
2023 |
Publication |
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Abbreviated Journal |
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Issue |
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Pages |
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Abstract |
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Programme |
133,139 |
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Thesis |
Bachelor's thesis |
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Approved |
yes |
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Call Number |
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Serial |
8673 |
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Author |
Tifenn Le Bris, Guilhem Barruol, Emmanuel Le Meur, Florent Gimbert, Dimitri Zigone |
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Title |
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Type |
Peer-reviewed symposium |
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Year |
2023 |
Publication |
Copernicus meetings |
Abbreviated Journal |
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Volume |
EGU23-7489 |
Issue |
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Pages |
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Keywords |
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Abstract |
In coastal Antarctica, outlet glaciers exhibit complex dynamics materialized by intense internal deformation, enhanced basal sliding and strong thermo-mechanical interactions with the ocean. Here we aim to use seismic observations to unravel these various processes and their link with glacier and ocean dynamics. As part of the SEIS-ADELICE project (2020-2024) supported by the French Polar Institute IPEV, in January 2022 we deployed four permanent and six temporary (1 month long) broadband seismic stations on and around the Astrolabe Glacier (Terre Adélie, East Antarctica), as well as four ocean-bottom seismometers at sea near the terminus of the floating tongue. In January 2023 we will be supplementing this setup by a temporary network of 50 seismic nodes above the grounding line of the glacier.
Preliminary detection and classification of seismic events reveals a wide variety of cryo-seismic signals. The most pervasive events correspond to icequakes, are located close to the surface, and exhibit clear tidal modulation. We interpret these events as being generated by the brittle fracturing of ice associated with crevasse opening. We also observe numerous short and similar repetitive events of much lower amplitude that are located at few restricted locations near the ice-bedrock interface. These events are likely produced by basal stick-slip over punctual bedrock asperities. Finally, we observe glacial tremors which could result from hydraulic sources at the ice-bedrock interface, although further analysis is required to confirm this hypothesis.
This preliminary work provides useful grounds for deeper analysis to be done in the future on source characteristics and their more quantitative links with glacier dynamics. |
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Programme |
411 |
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ISSN |
EGU23-7489 |
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Approved |
yes |
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Call Number |
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Serial |
8545 |
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Author |
Sara Arioli, Ghislain Picard, Laurent Arnaud, Vincent Favier |
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Title |
Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements |
Type |
Journal |
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Year |
2023 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
17 |
Issue |
6 |
Pages |
2323-2342 |
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Keywords |
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Abstract |
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Programme |
1110 |
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ISSN |
1994-0416 |
ISBN |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8627 |
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| Permanent link to this record |
