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Jade Vacquié-Garcia
Centre national de la recherche scientifique
13Publications
8H-index
183Citations
Publications 13
Newest
#2Christian LydersenH-Index: 47
Last.Kit M. KovacsH-Index: 3
view all 6 authors...
Identifying environmental characteristics that define the ecological niche of a species is essential to understanding how changes in physical conditions might affect its distribution and other aspects of its ecology. The present study used satellite relay data loggers (SRDLs) to study habitat use by Northeast Atlantic hooded seals (N = 20; 9 adult females, 3 adult males, and 8 juveniles). Three different methods were used in combination to achieve maximum insight regarding key foraging areas for...
3 CitationsSource
#1Jade Vacquié-Garcia (CNRS: Centre national de la recherche scientifique)H-Index: 8
#2Jérôme Mallefet (UCL: Université catholique de Louvain)H-Index: 18
Last.Christophe Guinet (CNRS: Centre national de la recherche scientifique)H-Index: 50
view all 5 authors...
Bioluminescence is produced by a broad range of organisms for defense, predation or communication purposes. Southern elephant seal (SES) vision is adapted to low-intensity light with a peak sensitivity, matching the wavelength emitted by myctophid species, one of the main preys of female SES. A total of 11 satellite-tracked female SESs were equipped with a time-depth-light 3D accelerometer (TDR10-X) to assess whether bioluminescence could be used by SESs to locate their prey. Firstly, we demonst...
Source
#1Gaëtan RichardH-Index: 7
#2Samantha L. CoxH-Index: 6
Last.Christophe GuinetH-Index: 50
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Assessing energy gain and expenditure in free ranging marine predators is difficult. However,such measurements are critical if we are to understand how variation in foraging efficiency,and in turn individual body condition, is impacted by environmentally driven changesin prey abundance and/or accessibility. To investigate the influence of oceanographic habitattype on foraging efficiency, ten post-breeding female southern elephant seals Miroungaleonina (SES) were equipped and tracked with bio-log...
12 CitationsSource
#1Joffrey Jouma’a (CNRS: Centre national de la recherche scientifique)H-Index: 4
#2Yves Le Bras (CNRS: Centre national de la recherche scientifique)H-Index: 4
Last.Christophe Guinet (CNRS: Centre national de la recherche scientifique)H-Index: 50
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Summary 1. Optimal diving models have been developed to investigate how air-breathing predators should adjust their diving behaviour to optimize their foraging efficiency. Using time-depth recorders and 3D accelerometers, we addressed this question on six free-ranging Southern Elephant Seal (SES) females equipped on Kerguelen Island. 2. We hypothesize that seals would initially increase their foraging time with distance to the foraging patches before reducing it for physiological reasons, regard...
19 CitationsSource
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, allow- ing for more accurate estimations of foraging behaviour. Despite increased numbers of such devices being deployed, their use is st...
9 CitationsSource
#1Sara Labrousse (University of Paris)H-Index: 3
#2Jade Vacquié-Garcia (CNRS: Centre national de la recherche scientifique)H-Index: 8
Last.Jean-Benoît Charrassin (University of Paris)H-Index: 24
view all 11 authors...
Understanding the responses of animals to the environment is crucial for identifying critical foraging habitat. Elephant seals (Mirounga leonina) from the Kerguelen Islands (49°20′S, 70°20′E) have several different foraging strategies. Why some individuals undertake long trips to the Antarctic continent while others utilize the relatively close frontal zones is poorly understood. Here, we investigate how physical properties within the sea ice zone are linked to foraging activities of southern el...
19 CitationsSource
#1Frederic Bailleul (University of La Rochelle)H-Index: 2
#2Jade Vacquié-Garcia (University of La Rochelle)H-Index: 8
Last.Christophe Guinet (University of La Rochelle)H-Index: 50
view all 3 authors...
The current decline in dissolved oxygen concentration within the oceans is a sensitive indicator of the effect of climate change on marine environment. However the impact of its declining on marine life and ecosystems’ health is still quite unclear because of the difficulty in obtaining in situ data, especially in remote areas, like the Southern Ocean (SO). Southern elephant seals (Mirounga leonina) proved to be a relevant alternative to the traditional oceanographic platforms to measure physica...
8 CitationsSource
#1Jade Vacquié-Garcia (CNRS: Centre national de la recherche scientifique)H-Index: 8
#2Christophe Guinet (CNRS: Centre national de la recherche scientifique)H-Index: 50
Last.Frédéric Bailleul (CNRS: Centre national de la recherche scientifique)H-Index: 19
view all 4 authors...
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...
8 CitationsSource
#1Gaëtan Richard (CNRS: Centre national de la recherche scientifique)H-Index: 7
#2Jade Vacquié-Garcia (CNRS: Centre national de la recherche scientifique)H-Index: 8
Last.Christophe Guinet (CNRS: Centre national de la recherche scientifique)H-Index: 50
view all 8 authors...
Mature female southern elephant seals (Mirounga leonina) come ashore only in October to breed and in January to moult, spending the rest of the year foraging at sea. Mature females may lose as much as 50% of their body mass, mostly in lipid stores, during the breeding season due to fasting and lactation. When departing to sea, post-breeding females are negatively buoyant, and the relative change in body condition (i.e. density) during the foraging trip has previously been assessed by monitoring ...
24 CitationsSource
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