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Author Dragon Anne-Cecile, Monestiez P, Bar-Hen A, Guinet C, pdf  doi
openurl 
  Title Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands Type Journal Article
  Year 2010 Publication Progress In Oceanography Abbreviated Journal  
  Volume 87 Issue 14 Pages 61-71  
  Keywords  
  Abstract In the Southern Ocean, mesoscale features, such as fronts and eddies, have been shown to have a significant impact in structuring and enhancing primary productivity. They are therefore likely to influence the spatial structure of prey fields and play a key role in the creation of preferred foraging regions for oceanic top-predators. Optimal foraging theory predicts that predators should adjust their movement behaviour in relation to prey density. While crossing areas with sufficient prey density, we expect predators would change their behaviour by, for instance, decreasing their speed and increasing their turning frequency. Diving predators would as well increase the useful part of their dive i.e. increase bottom-time thereby increasing the fraction of time spent capturing prey. Southern elephant seals from the Kerguelen population have several foraging areas: in Antarctic waters, on the Kerguelen Plateau and in the interfrontal zone between the Subtropical and Polar Fronts. This study investigated how the movement and diving behaviour of 22 seals equipped with satellite-relayed data loggers changed in relation to mesoscale structures typical of the interfrontal zone. We studied the links between oceanographic variables including temperature and sea level anomalies, and diving and movement behaviour such as displacement speed, diving duration and bottom-time. Correlation coefficients between each of the time series were calculated and their significance tested with a parametric bootstrap. We focused on oceanographic changes, both temporal and spatial, occurring during behavioural transitions in order to clarify the connections between the behaviour and the marine environment of the animals. We showed that a majority of seals displayed a specific foraging behaviour related to the presence of both cyclonic and anticyclonic eddies. We characterized mesoscale oceanographic zones as either favourable or unfavourable based on the intensity of foraging activity as identified by the behavioural variables. Our findings highlight the importance of mesoscale features for top-predators behaviour and introduce a new approach for evaluating the importance to the seals of the origin and intensity of these features.  
  Programme 109  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0079-6611 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 3058  
Permanent link to this record
 

 
Author Alice Gadea, Maryvonne Charrier, Mathieu Fanuel, Philippe Clerc, Corentin Daugan, Aurélie Sauvager, Hélène Rogniaux, Joël Boustie, Anne-Cécile Le Lamer, Françoise Lohézic - Le Devehat file  doi
openurl 
  Title Overcoming deterrent metabolites by gaining essential nutrients: A lichen/snail case study Type Journal
  Year 2019 Publication Phytochemistry Abbreviated Journal  
  Volume 164 Issue Pages 86-93  
  Keywords D-arabitol; Feeding choice; Lichen; Mass spectrometry imaging; Parmeliaceae; Snail; Usnic acid  
  Abstract Specialised metabolites in lichens are generally considered repellent compounds by consumers. Nevertheless, if the only food available is lichens rich in specialised metabolites, lichenophages must implement strategies to overcome the toxicity of these metabolites. Thus, the balance between phagostimulant nutrients and deterrent metabolites could play a key role in feeding preferences. To further understand lichen-gastropod interactions, we studied the feeding behaviour and consumption in Notodiscus hookeri, the land snail native to sub-Antarctic islands. The lichen Usnea taylorii was used because of its simple chemistry, its richness in usnic acid (specialised metabolite) and arabitol (primary metabolite) and its presence in snail habitats. Choice tests in arenas with intact lichens versus acetone-rinsed lichens were carried out to study the influence of specialised metabolites on snail behaviour and feeding preference. Simultaneously, usnic acid and arabitol were quantified and located within the lichen thallus using HPLC-DAD-MS and in situ imaging by mass spectrometry to assess whether their spatial distribution explained preferential snail grazing. No-choice feeding experiments, with the pure metabolites embedded in an artificial diet, defined a gradual gustatory response, from strong repellence (usnic acid) to high appetence (D-arabitol). This case study demonstrates that the nutritional activity of N. hookeri is governed by the chemical quality of the food and primarily by nutrient availability (arabitol), despite the presence of deterrent metabolite (usnic acid).  
  Programme 136  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0031-9422 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 7652  
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Author G. Ekstrom, M Nettles, A.M. Dziewonski doi  openurl
  Title The global CMT project 2004-2010: Centroid-moment tensors for 13,017 earthquakes Type Journal Article
  Year 2012 Publication Physics of the Earth and Planetary Interiors Abbreviated Journal  
  Volume 200-201 Issue Pages  
  Keywords Centroid-moment tensor; Earthquakes; Global seismicity  
  Abstract Earthquake moment tensors reflecting seven years of global seismic activity (2004–2010) are presented. The results are the product of the global centroid-moment-tensor (GCMT) project, which maintains and extends a catalog of global seismic moment tensors beginning with earthquakes in 1976. Starting with earthquakes in 2004, the GCMT analysis takes advantage of advances in the mapping of propagation characteristics of intermediate-period surface waves, and includes these waves in the moment-tensor inversions. This modification of the CMT algorithm makes possible the globally uniform determination of moment tensors for earthquakes as small as MW=5.0. For the period 2004–2010, 13,017 new centroid-moment tensors are reported.  
  Programme 133  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0031-9201 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 4648  
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Author Okal Emile A, Stein Seth, pdf  doi
openurl 
  Title Observations of ultra-long period normal modes from the 2004 SumatraAndaman earthquake Type Journal Article
  Year 2009 Publication Physics of the Earth and Planetary Interiors Abbreviated Journal  
  Volume 175 Issue 12 Pages 53-62  
  Keywords Sumatra-Andaman earthquake, Normal modes, Splitting,  
  Abstract  
  Programme 133  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0031-9201 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 2918  
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Author Marlène Dupraz, Céline Toty, Valérie Noël, Agustin Estrada-Peňa, Jacob González-Solís, Thierry Boulinier, Jean-Pierre Dujardin, Karen D. McCoy file  doi
openurl 
  Title Linking morphometric and genetic divergence with host use in the tick complex, Ornithodoros capensis sensu lato Type Journal
  Year 2016 Publication Infection, Genetics and Evolution Abbreviated Journal  
  Volume 46 Issue Pages 12-22  
  Keywords Adaptation Ectoparasite Host specificity Morphometry Population genetic structure Tropical seabirds  
  Abstract Host specific adaptations in parasites can lead to the divergence of conspecific populations. However, this divergence can be difficult to measure because morphological changes may not be expressed or because obvious changes may simply reflect phenotypic plasticity. Combining both genetic and phenotypic information can enable a better understanding of the divergence process and help identify the underlying selective forces, particularly in closely-related species groups. Here, we link genetic and morphometric data to understand divergence patterns within the Ornithodoros (Carios) capensis complex, a group of soft ticks (Argasidae) exploiting colonial seabirds across the globe. Species designations in this complex were historically based on larval morphology and geographic location. However, recent work has suggested that divergence within the group may be at least partially linked to host specificity. We therefore first examined population genetic structure of ticks in relation to host use and geography. These analyses revealed strong structure in relation to host use, both when populations were sympatric and widely allopatric, with a secondary effect of geography. They also demonstrated the presence of several novel and presumably undescribed species exploiting these seabird hosts. We then used geometric morphometrics (landmark and outline analyses) to test whether host-associated genetic divergence is always accompanied by the same phenotypic changes. We found that morphological variation (size and shape) correlated well with genetic structure; tick size and shape varied strongly in relation to host type, and weakly with geography. These results support the hypothesis that speciation in this tick group has been more strongly shaped by host use than by geographic barriers per se. The revealed phenetic patterns now require detailed investigation to link them with host-specific selective forces.  
  Programme 109,1151  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1567-1348 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8223  
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Author Maëlle Connan, Vonica Perold, Ben J. Dilley, Christophe Barbraud, Yves Cherel, Peter G. Ryan file  doi
openurl 
  Title The Indian Ocean ‘garbage patch’: Empirical evidence from floating macro-litter Type Journal
  Year 2021 Publication Marine pollution bulletin Abbreviated Journal  
  Volume 169 Issue Pages 112559  
  Keywords At-sea survey Frontal system Garbage patch Plastic litter Southern Indian Ocean  
  Abstract Marine litter has become a global issue with ‘garbage patches’ documented in all ocean gyres. The Pacific and Atlantic garbage patches have been well described, but there are few empirical data for the Indian Ocean. In the austral summer 2019–2020, we conducted an at-sea survey of macro-litter in the rarely investigated south-west Indian Ocean. Over 24 days, 1623 man-made items were observed including plastic fragments, packaging and fishing-related items during 216 h of observations covering 5464 km. More than 99% of the litter items were plastics of which almost 60% were white. Floating litter was patchily distributed with only five items (0.2%) recorded south of 40°S (0.1 items·km‐2). Half of the items were encountered over a two-day period south-east of Madagascar (30°S; 59–67°E; 75.2 items·km‐2). Our survey detected an accumulation of litter in the southern Indian Ocean and demonstrated that this area warrants more research.  
  Programme 109  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0025-326X ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 7939  
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Author Delord Karine, Barbraud Christophe, Bost Charles-André, Deceuninck Bernard, Lefebvre Thierry, Lutz Rose, Micol Thierry, Phillips Richard A, Trathan Phil N, Weimerskirch Henri, doi  openurl
  Title Areas of importance for seabirds tracked from French southern territories, and recommendations for conservation Type Journal Article
  Year 2014 Publication Marine Policy Abbreviated Journal  
  Volume 48 Issue Pages 1-13  
  Keywords High Sea, Key areas, Marine Important Bird Area, Seabirds, Southern Ocean, Tracking,  
  Abstract  
  Programme 109;394  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0308-597X ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5013  
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Author Van de Putte Anton P, Janko Karel, Kasparova Eva, Maes Gregory E, Rock Jennifer, Koubbi Philippe, Volckaert Filip AM, Choleva Luká, Fraser Keiron PP, Smykla Jerzy, Van Houdt Jeroen KJ, Marshall Craig, pdf  doi
openurl 
  Title Comparative phylogeography of three trematomid fishes reveals contrasting genetic structure patterns in benthic and pelagic species Type Journal Article
  Year 2012 Publication Marine Genomics Abbreviated Journal  
  Volume 8 Issue Pages 23-34  
  Keywords Microsatellite markers, Mitochondrial, Larval duration, Glaciations, Notothenioidei, Life history,  
  Abstract Population genetics patterns of marine fish in general and of Southern Ocean fish in particular range from virtual panmixia over ocean-wide scale to deeply fragmented populations. However the causes underlying these different patterns are not properly understood. In this paper, we tested the hypotheses that population connectivity is positively related to a combination of life history traits, namely duration of pelagic larval period and the tendency towards pelagic life style in the adulthood. To do so, we analysed the variability of six microsatellite and one mitochondrial marker (cytochrome b) in three Southern Ocean fish species (Trematomus newnesi, Trematomus hansoni and Trematomus bernacchii). They share a recent common ancestor but notably differ in their duration of pelagic larval period as well as pelagic versus benthic lifestyle. We sampled over a range of more than 5000 km for all three species and used a number of population genetics tools to investigate past and contemporary levels of connectivity. All species experienced population fluctuations, but coalescent simulations suggested that contemporary populations are in migration-drift equilibrium. Although global FST values were rather low, a significant population structure separated the High-Antarctic from the Peninsular regions in all species. The level of genetic differentiation was much lower in the pelagic versus benthic species. Present data suggest that past and present genetic structuring in the Southern Ocean are indeed related with the ecological traits of Antarctic fish, however the relative importance of individual factors remains unclear.  
  Programme 1142  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1874-7787 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 3167  
Permanent link to this record
 

 
Author Tabouret Hélène, Pomerleau Sébastien, Jolivet Aurélie, Pécheyran Christophe, Riso Ricardo, Thébault Julien, Chauvaud Laurent, Amouroux David, doi  openurl
  Title Specific pathways for the incorporation of dissolved barium and molybdenum into the bivalve shell: An isotopic tracer approach in the juvenile Great Scallop (Pecten maximus) Type Journal Article
  Year 2012 Publication Marine Environmental Research Abbreviated Journal Mar. Environ. Res.  
  Volume 78 Issue Pages 15-25  
  Keywords Isotopes, Femtosecond laser ablation, Scallop shell, Barium, Molybdenum, Pecten maximus, Tracers, Biogeochemical cycle,  
  Abstract Dissolved barium and molybdenum incorporation in the calcite shell was investigated in the Great Scallop Pecten maximus. Sixty six individuals were exposed for 16 days to two successive dissolved Ba and Mo concentrations accurately differentiated by two different isotopic enrichments (97Mo, 95Mo; 135Ba, 137Ba). Soft tissue and shell isotopic composition were determined respectively by quantitative ICP-MS (Inductively Coupled Plasma Mass Spectrometer) and laser ablation ICP-MS. Results from Ba enrichment indicate the direct incorporation of dissolved Ba into the shell in proportion to the levels in the water in which they grew with a 68 day delay. The low spike contributions and the low partition coefficient (DMo = 0.0049 ± 0.0013), show that neither the soft tissue nor the shell were significantly sensitive to Mo enrichment. These results eliminate direct Mo shell enrichment by the dissolved phase, and favour a trophic uptake that will be investigated using the successive isotopic enrichment approach developed in this study.  
  Programme 1090  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0141-1136 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 3020  
Permanent link to this record
 

 
Author Gaëlle Lamarque, Jérôme Bascou, René-Pierre Ménot, Jean-Louis Paquette, Simon Couzinié, Yann Rolland, Jean-Yves Cottin file  doi
openurl 
  Title Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U-Pb dating of gneiss xenoliths and implications for the South Australia-East Antarctica connection Type Journal
  Year 2018 Publication Lithos Abbreviated Journal  
  Volume 318-319 Issue Pages 219-229  
  Keywords Antarctica-Australia connection George V Land; Gondwana margin; Ross orogeny; Zircon and monazite UPb dating  
  Abstract This study presents the first geochronological results on basement rocks from the Penguin-Bage-Webb (PBW) domain located east of the Neoarchean-Paleoproterozoic Terre Adélie craton, Antarctica. Investigated samples are paragneiss xenoliths hosted within early Paleozoic granitoids, which were emplaced during the Ross orogeny. Zircon UPb dating yielded ages ranging from the Archean to the Cambrian, with a dominant Ediacaran (550–635 Ma) population and maximum depositional ages around 570–575 Ma. U–Th–Pb analyses of monazite suggest that the metamorphic event that formed the gneiss samples occured at ca. 515 Ma, shortly prior to incorporation within the granitic magmas. The studied samples likely represent relics of the pre-Gondawana Pacific margin, which was subsequently deformed and metamorphosed during the early Paleozoic Ross orogeny. The obtained zircon UPb date distributions present similarities with those of the Kanmantoo and Nargoon sediments in Southern Australia and provide new constrains for the correlations between East Antarctica and South Australia before the opening of the Southern Ocean.  
  Programme 1003  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0024-4937 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 7650  
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