. (2023). Track and dive-based movement metrics do not predict the number of prey encountered by a marine predator (Vol. 11). Bachelor's thesis, , .
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.
Keywords: Accelerometry Area-restricted search Diving behavior Foraging behavior Marine predator Prey encounter events
Programme: 109,1201
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Morin, S.; Savarino, J.; Frey, M.M.; Yan, N.; Bekki, S.; Bottenheim, J.W.; Martins, J.M.F. (2008). Tracing the Origin and Fate of NOx in the Arctic Atmosphere Using Stable Isotopes in Nitrate. Science, 322(5902), 730–732.
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.
Programme: 1011
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Dietrich Muriel, Kempf Florent, Boulinier Thierry, McCoy Karen D, . (2014). Tracing the colonization and diversification of the worldwide seabird ectoparasite Ixodes uriae
. Molecular Ecology, 23(13), 3292–3305.
Keywords: colonization, cytochrome c oxidase subunit III (COIII), dispersal, hard ticks, microsatellites, vectorborne infectious agents,
Programme: 333
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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, . (2011). Tracing of water masses using a multi isotope approach in the southern Indian Ocean
. Earth and Planetary Science Letters, 302, 14–26.
Keywords: ANTARES IV, carbon-14, Crozet Basin, deuterium, Indian Ocean, iodine-129, oxygen-18, seawater, tritium,
Programme: 1061
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. (2014). Trace elements in tissues of white-chinned petrels (Procellaria aequinoctialis) from Kerguelen waters, Southern Indian Ocean
. Polar Biol., 37(6), 763–771-.
Keywords: Heavy metals, Seabirds, Procellariiformes, Southern Ocean, Sub-Antarctic Islands,
Programme: 109
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Caio V. Z. Cipro, Y. Cherel, P. Bocher, F. Caurant, P. Miramand, P. Bustamante. (2017). Trace elements in invertebrates and fish from Kerguelen waters, southern Indian Ocean (Vol. 41).
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.
Programme: 109
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Caio V. Z. Cipro, Y. Cherel, P. Bocher, F. Caurant, P. Miramand, P. Bustamante. (2018). Trace elements in invertebrates and fish from Kerguelen waters, southern Indian Ocean (Vol. 41).
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.
Keywords: Food web Kerguelen Metals Myctophid Plankton Trace elements
Programme: 109
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. (2015). Trace elements in Antarctic fish species and the influence of foraging habitats and dietary habits on mercury levels (Vol. 538).
Keywords: Heavy metals Nototheniidae Southern Ocean Stable isotopes
Programme: 1010
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Engrand C., Deloule E., Kurat G. & Maurette M. (1996). Trace elements contents of Antarctic cosmic spherules and their COSPS phases. Meteoritics, 31, 42.
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Kerschhofer L., Koerberl C., Kurat G., Walter J. & Maurette M. (1994). Trace elements anlysis by INAA of micrometeorites from Antarctica. Meteoritics, 29, 481.
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