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Author |
Hassen Allegue, Denis RĂ©ale, Baptiste Picard, Christophe Guinet |
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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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Bachelor's thesis |
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ISSN |
2051-3933 |
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yes |
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Call Number |
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Serial |
8556 |
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Author |
Morin, S.; Savarino, J.; Frey, M.M.; Yan, N.; Bekki, S.; Bottenheim, J.W.; Martins, J.M.F. |
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Title |
Tracing the Origin and Fate of NOx in the Arctic Atmosphere Using Stable Isotopes in Nitrate |
Type |
Journal Article |
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Year |
2008 |
Publication |
Science |
Abbreviated Journal |
Science |
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Volume |
322 |
Issue |
5902 |
Pages |
730-732 |
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Keywords |
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Abstract |
Atmospheric nitrogen oxides (NOx =NO+ NO2) play a pivotal role in the cycling of reactive nitrogen (ultimately deposited as nitrate) and the oxidative capacity of the atmosphere. Combined measurements of nitrogen and oxygen stable isotope ratios of nitrate collected in the Arctic atmosphere were used to infer the origin and fate of NOx and nitrate on a seasonal basis. In spring, photochemically driven emissions of reactive nitrogen from the snowpack into the atmosphere make local oxidation of NOx by bromine oxide the major contributor to the nitrate budget. The comprehensive isotopic composition of nitrate provides strong constraints on the relative importance of the key atmospheric oxidants in the present atmosphere, with the potential for extension into the past using ice cores. |
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Programme |
1011 |
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ISSN |
0036-8075 |
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Notes |
10.1126/science.1161910 |
Approved |
yes |
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Call Number |
IPEV @ Thierry.Lemaire @ |
Serial |
5513 |
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Author |
Dietrich Muriel, Kempf Florent, Boulinier Thierry, McCoy Karen D, |
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Title |
Tracing the colonization and diversification of the worldwide seabird ectoparasite Ixodes uriae
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Type |
Journal Article |
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Year |
2014 |
Publication |
Molecular Ecology |
Abbreviated Journal |
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Volume |
23 |
Issue |
13 |
Pages |
3292-3305 |
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Keywords |
colonization, cytochrome c oxidase subunit III (COIII), dispersal, hard ticks, microsatellites, vectorborne infectious agents, |
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Abstract |
Historical patterns of dispersal and population isolation are key components shaping contemporary genetic diversity across landscapes and require explicit consideration when examining the relative role of different factors in driving the evolution of host specificity in parasitic organisms. In this study, we investigate the worldwide colonization history of a common ectoparasite of seabirds, the tick Ixodes uriae. This tick has a circumpolar distribution across both hemispheres but has repeatedly formed host-specific races within different regions. By combining mitochondrial and nuclear data, we infer how this species spread to its present-day distribution and how the colonization process may have affected the geographic and host-associated structure of this tick within regions. We demonstrate that I. uriae is highly structured at a global scale and isolates into four genetic groups that correspond to well-defined geographical regions. Molecular dating suggests that the diversification of I. uriae began in the early Miocene (22 Myr) and that this tick colonized most of the southern hemisphere before moving into northern latitudes via two independent routes. However, no relationship between the degree of host race divergence and colonization history was evident, supporting previous hypotheses that host specialization evolves relatively rapidly in this parasite, but does not typically lead to speciation. We discuss the possible historical and contemporary mechanisms of large-scale dispersal for this ectoparasite and how its biological characteristics may condition current patterns of genetic diversity. More generally, our results illustrate how combining broad-scale sampling and modern molecular tools can help disentangle complex patterns of diversification in widespread parasites.
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Programme |
333 |
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Corporate Author |
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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 |
1365-294X |
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 |
4946 |
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Author |
Povinec P P, Breier R, Coppola L, Groening M, Jeandel C, Jull A J T, Kieser W E, Lee S -H, Liong Wee Kwong L, Morgenstern U, Park Y -H, Z Top, |
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Title |
Tracing of water masses using a multi isotope approach in the southern Indian Ocean
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Type |
Journal Article |
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Year |
2011 |
Publication |
Earth and Planetary Science Letters |
Abbreviated Journal |
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Volume |
302 |
Issue |
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Pages |
14-26 |
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Keywords |
ANTARES IV, carbon-14, Crozet Basin, deuterium, Indian Ocean, iodine-129, oxygen-18, seawater, tritium, |
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Abstract |
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Programme |
1061 |
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Campaign |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Original Title |
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Series Editor |
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Series Issue |
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Edition |
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ISSN |
0012-821X |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
4232 |
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Author |
Cipro CaioVZ, Cherel Yves, Caurant Florence, Miramand Pierre, MĂ©ndez-Fernandez Paula, Bustamante Paco, |
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Title |
Trace elements in tissues of white-chinned petrels (Procellaria aequinoctialis) from Kerguelen waters, Southern Indian Ocean
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Type |
Journal Article |
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Year |
2014 |
Publication |
POLAR BIOLOGY |
Abbreviated Journal |
Polar Biol. |
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Volume |
37 |
Issue |
6 |
Pages |
763-771- |
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Keywords |
Heavy metals, Seabirds, Procellariiformes, Southern Ocean, Sub-Antarctic Islands, |
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Abstract |
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Programme |
109 |
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Campaign |
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Thesis |
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Publisher |
Springer Berlin Heidelberg |
Place of Publication |
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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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Edition |
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ISSN |
0722-4060 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
5050 |
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Author |
Caio V. Z. Cipro, Y. Cherel, P. Bocher, F. Caurant, P. Miramand, P. Bustamante |
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Title |
Trace elements in invertebrates and fish from Kerguelen waters, southern Indian Ocean |
Type |
Journal |
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Year |
2017 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
41 |
Issue |
1 |
Pages |
175-191 |
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Keywords |
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Abstract |
Given the lack of background data on essential and non-essential trace elements in invertebrates and fish known to be the predominant prey of marine mammals and seabirds breeding at the Kerguelen Islands, this study intends to provide these results of great influence for predators in higher trophic levels. To this end, plankton organisms (9 species/4 phyla), mollusks (2 bivalves and 2 squid species) and fishes (8 benthic and 10 pelagic species) from Kerguelen waters were analysed for cadmium (Cd), copper (Cu), mercury (Hg) and zinc (Zn). Individual concentrations of non-essential elements (particularly Cd) showed larger variation in comparison with essential ones likely due to their homeostasis. Thus Cd ranged over 4 orders of magnitude; however, Hg ranged only 1, without significant correlation to trophic level. Instead, ecological parameters (benthic/mesopelagic habitat and feeding ecology) showed a more important influence on the results. Concerning seashore organisms, bivalves collected inside the Gulf of Morbihan had higher Cd concentrations compared to those from the Kerguelen shelf, suggesting a local source of Cd, such as runoff water from bird colonies. Comparison with the literature showed metal concentrations in invertebrates and fishes from Kerguelen Islands somewhat lower than those in the Antarctic area, with Hg prevailing in benthic species and Cd in pelagic ones. In contrast to Hg, Cd values of squids, jellyfish and the amphipod Themisto gaudichaudii were significantly higher than all other species. Finally, top predators foraging in this area that can be subject to potentially high Hg and Cd exposure through their diet at Kerguelen are reviewed. |
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Programme |
109 |
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Corporate Author |
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Series Editor |
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Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0722-4060, 1432-2056 |
ISBN |
0722-4060, 1432-2056 |
Medium |
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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 |
6656 |
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| Permanent link to this record |
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Author |
Caio V. Z. Cipro, Y. Cherel, P. Bocher, F. Caurant, P. Miramand, P. Bustamante |
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Title |
Trace elements in invertebrates and fish from Kerguelen waters, southern Indian Ocean |
Type |
Journal |
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Year |
2018 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
41 |
Issue |
1 |
Pages |
175-191 |
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Keywords |
Food web Kerguelen Metals Myctophid Plankton Trace elements |
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Abstract |
Given the lack of background data on essential and non-essential trace elements in invertebrates and fish known to be the predominant prey of marine mammals and seabirds breeding at the Kerguelen Islands, this study intends to provide these results of great influence for predators in higher trophic levels. To this end, plankton organisms (9 species/4 phyla), mollusks (2 bivalves and 2 squid species) and fishes (8 benthic and 10 pelagic species) from Kerguelen waters were analysed for cadmium (Cd), copper (Cu), mercury (Hg) and zinc (Zn). Individual concentrations of non-essential elements (particularly Cd) showed larger variation in comparison with essential ones likely due to their homeostasis. Thus Cd ranged over 4 orders of magnitude; however, Hg ranged only 1, without significant correlation to trophic level. Instead, ecological parameters (benthic/mesopelagic habitat and feeding ecology) showed a more important influence on the results. Concerning seashore organisms, bivalves collected inside the Gulf of Morbihan had higher Cd concentrations compared to those from the Kerguelen shelf, suggesting a local source of Cd, such as runoff water from bird colonies. Comparison with the literature showed metal concentrations in invertebrates and fishes from Kerguelen Islands somewhat lower than those in the Antarctic area, with Hg prevailing in benthic species and Cd in pelagic ones. In contrast to Hg, Cd values of squids, jellyfish and the amphipod Themisto gaudichaudii were significantly higher than all other species. Finally, top predators foraging in this area that can be subject to potentially high Hg and Cd exposure through their diet at Kerguelen are reviewed. |
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Programme |
109 |
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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 |
1432-2056 |
ISBN |
1432-2056 |
Medium |
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Area |
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Expedition |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7115 |
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Author |
Aurélie Goutte, Yves Cherel, Carine Churlaud, Jean-Pierre Ponthus, Guillaume Massé, Paco Bustamante |
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Title |
Trace elements in Antarctic fish species and the influence of foraging habitats and dietary habits on mercury levels |
Type |
Journal |
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Year |
2015 |
Publication |
Science of The Total Environment |
Abbreviated Journal |
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Volume |
538 |
Issue |
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Pages |
743-749 |
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Keywords |
Heavy metals Nototheniidae Southern Ocean Stable isotopes |
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Abstract |
This study aims at describing and interpreting concentration profiles of trace elements in seven Antarctic fish species (N=132 specimens) off Adélie Land. Ichthyofauna plays a key role in the Antarctic ecosystem, as they occupy various ecological niches, including cryopelagic (ice-associated), pelagic, and benthic habitats. Firstly, trace element levels in the studied specimens were similar to those previously observed in fish from the Southern Ocean. Apart from manganese and zinc, concentrations of arsenic, cadmium, copper, iron, mercury (Hg), nickel, selenium and silver differed among fish species. Muscle δ13C and δ15N values were determined to investigate whether the fish foraging habitats and dietary habits could explain Hg levels. Species and foraging habitat (δ13C) were strong predictors for variations of Hg concentrations in muscle tissues. The highest Hg contamination was found in shallow benthic fish compared to cryopelagic and pelagic fish. This pattern was likely due to the methylation of Hg in the coastal sediment and the photodemethylation by ultraviolet radiation in surface waters. |
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Programme |
1010 |
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Edition |
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ISSN |
0048-9697 |
ISBN |
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Expedition |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8143 |
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| Permanent link to this record |
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Author |
Engrand C., Deloule E., Kurat G. & Maurette M. |
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Title |
Trace elements contents of Antarctic cosmic spherules and their COSPS phases. |
Type |
Journal Article |
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Year |
1996 |
Publication |
Meteoritics |
Abbreviated Journal |
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Volume |
31 |
Issue |
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Pages |
42 |
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Keywords |
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Abstract |
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Programme |
226 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
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Place of Publication |
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Summary Language |
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Original Title |
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Series Volume |
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Series Issue |
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ISSN |
0026-1114 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
592 |
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| Permanent link to this record |
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Author |
Kerschhofer L., Koerberl C., Kurat G., Walter J. & Maurette M. |
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Title |
Trace elements anlysis by INAA of micrometeorites from Antarctica. |
Type |
Journal Article |
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Year |
1994 |
Publication |
Meteoritics |
Abbreviated Journal |
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Volume |
29 |
Issue |
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Pages |
481 |
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Keywords |
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Abstract |
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Programme |
226 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Place of Publication |
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Summary Language |
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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 |
0026-1114 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
683 |
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| Permanent link to this record |
