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Vadurel F. |
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2004 |
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281 |
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2533 |
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Title |
Foraging in the Darkness of the Southern Ocean: Influence of Bioluminescence on a Deep Diving Predator
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2012 |
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PLOS ONE |
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7 |
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8 |
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e43565 |
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109 |
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1932-6203 |
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yes |
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4261 |
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2014 |
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109 |
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5130 |
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Author |
Vacquié-Garcia Jade, Guinet Christophe, Laurent Cécile, Bailleul Frédéric |
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Title |
Delineation of the southern elephant seal's main foraging environments defined by temperature and light conditions |
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Journal Article |
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Year |
2015 |
Publication |
Impacts of climate on marine top predators |
Abbreviated Journal |
Deep Sea Research Part II: Topical Studies in Oceanography |
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113 |
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145-153 |
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Abstract Changes in marine environments, induced by the global warming, are likely to influence the prey field distribution and consequently the foraging behaviour and the distribution of top marine predators. Thanks to bio-logging, the simultaneous measurements of fine-scale foraging behaviors and oceanographic parameters by predators allow characterizing their foraging environments and provide insights into their prey distribution. In this context, we propose to delimit and to characterize the foraging environments of a marine predator, the Southern Elephant Seal (SES). To do so, the relationship between oceanographic factors and prey encounter events (PEE) was investigated in 12 females SES from Kerguelen Island simultaneously equipped with accelerometers and with a range of physical sensors (temperature, light and depth). PEEs were assessed from the accelerometer data at high spatio-temporal precision while the physical sensors allowed the continuous monitoring of environmental conditions encountered by the SES when diving. First, visited and foraging environments were distinguished according to the oceanographic conditions encountered in the absence and in presence of PEE. Then, a hierarchical classification of the physical parameters recorded during PEEs led to the distinction of five different foraging environments. These foraging environments were structured according to the main frontal systems of the SO. One was located north to the subantarctic front (SAF) and characterized by high temperature and depth, and low light levels. Another, characterized by intermediate levels of temperature, light and depth, was located between the SAF and the polar front (PF). And finally, the last three environments were all found south to the PF and, characterized by low temperature but highly variable depth and light levels. The large physical and/or spatial differences found between these environments suggest that, depending on the location, different prey communities are targeted by SES over a broad range of water temperature, light level and depth conditions. This result highlights the versatility of this marine predator. In addition, in most cases, PEEs were found deeper during the day than during the night, which is indicative of mesopelagic prey performing nycthemeral migration, a behaviour consistent with myctophids species thought to represent the bulk of Kerguelen SES female diets. |
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109 |
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0967-0645 |
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yes |
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6309 |
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Author |
Vacquié-Garcia Jade, Guinet Christophe, Dragon Anne-Cécile, Viviant Morgane, El Ksabi Nory, Bailleul Frédéric |
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Title |
Predicting prey capture rates of southern elephant seals from track and dive parameters |
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Journal Article |
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Year |
2015 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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541 |
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Abstract |
In the marine environment, track and dive parameter data (obtained using Argos or GPS tags and time?depth recorders) are commonly used to provide proxies for foraging behaviour of marine predators. However, their accuracy is rarely assessed. Recently, the addition of head-mounted accelerometers has allowed for detection of prey capture attempts (PCAs) at sea, allowing for more accurate estimations of foraging behaviour. Despite increased numbers of such devices being deployed, their use is still marginal compared with other tools which measure track and dive parameters. The objectives of our study were (1) to identify the most relevant combination of tracking and diving metrics in predicting the frequency of PCAs in female southern elephant seals <i>Mirounga leonina</i> from the Kerguelen Islands, and (2) to apply it to a broader range of individuals for which only tracking and diving data were available. The results of our models were consistent with the optimal foraging theory as well as the optimal diving theory. The model with the best predictive performance was the one that combined both tracking and diving information. However, most of the variability in the number of PCAs could be solely explained by changes in the diving behaviour of seals. Finally, we used the best predictive model on 20 individuals, which had not been fitted with accelerometers, to determine their main foraging zones. The behavioural indicators established in this study constitute a useful ecological tool for population monitoring and conservation purposes. |
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109 |
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ISSN |
0171-8630 |
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yes |
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Call Number |
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Serial |
6310 |
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Author |
Vacchi M., Pisano E. & La Mesa G. |
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Title |
Ecological features of Antarctic fishes. |
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Journal Article |
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Year |
1999 |
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Cold Adapted organisms. Ecophysiology Enzymology Molecular Biology |
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217-238 |
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In Margesin R. & F. Schinner (eds). Cold Adapted organisms. Ecophysiology Enzymology Molecular Biology. Springer Heidelberg |
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281 |
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yes |
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Serial |
3009 |
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Author |
Vacchi M., La Mesa M. & Ozouf Ostaz C. |
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Title |
First occurrence of Acanthodraco dewitti Skora, 1995 (Notothenioidei, Bathydraconidae) in the Ross Sea. |
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Journal Article |
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Year |
2001 |
Publication |
Polar biology |
Abbreviated Journal |
Polar Biol. |
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Volume |
24 |
Issue |
6 |
Pages |
471-472 |
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281 |
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0722-4060 |
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yes |
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2520 |
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Author |
Vacchi M, Koubbi P, Ghigliotti L, Pisano E |
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Title |
Sea-Ice Interactions with Polar Fish: Focus on the Antarctic Silverfish Life History |
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Book Chapter |
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2012 |
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51-73 |
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In: Verde C, di Prisco G (eds), Adaptation and Evolution in Marine Environments, Volume 1, The Impacts of Global Change on Biodiversity, Springer-Verlag, Berlin Heidelberg |
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1142 |
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yes |
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3118 |
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Evaluation of the inter-annual variability of stratospheric chemical composition in chemistry-climate models using ground-based multi species time series |
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2016 |
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Journal of Atmospheric and Solar-Terrestrial Physics |
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145 |
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61-84 |
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Chemistry climate model NDACC observation Stratosphere Variability |
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209 |
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1364-6826 |
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1364-6826 |
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7295 |
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Author |
V. Masson-Delmotte |
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Title |
Svalbard isotopic measurements |
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Conference - International - Communication |
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Year |
2016 |
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French-Swedish partnership, GIWA project |
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1134 |
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6448 |
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