. (2009). Bacterial diversity of autotrophic enriched cultures from remote, glacial Antarctic, Alpine and Andean aerosol, snow and soil samples
. Biogeosciences, 6(1), 33–44.
|
. (2009). Molecular surveillance for avian influenza A virus in king penguins (Aptenodytes patagonicus)
. Polar Biol., 32(4), 663–665.
Abstract: An investigation of the presence of influenza A virus has been conducted in king penguins ( Aptenodytes patagonicus ) at the Possession Island in the Crozet Archipelago, Antarctica, using a rapid molecular diagnostic method based on real-time polymerase chain reaction. No evidence of outbreak or positive viral infection of influenza A virus was found in this study. We however recommend the implementation of long-term surveillance in seabird populations of polar ecosystems to detect the potential introduction of exotic strains and potential existence of a local epidemiological cycle for avian influenza viruses.
Keywords: Biomedical and Life Sciences,
Programme: 137
|
. (2009). A 4-decade record of elevation change of the Amery Ice Shelf, East Antarctica
. Journal of Geophysical Research, 114(F1), F01010–.
|
Bosqued J M, Ashour-Abdalla M, Umeda T, El Alaoui M, Peroomian V, Frey H U, Marchaudon A, Laakso H, . (2009). Cluster observations and numerical modeling of energy-dispersed ionospheric H+ ions bouncing at the plasma sheet boundary layer
. J. Geophys. Res., 114(A4), A04216–.
Keywords: dispersed structures, 2704 Magnetospheric Physics: Auroral phenomena, 2736 Magnetospheric Physics: Magnetosphere/ionosphere interactions, 2455 Ionosphere: Particle precipitation, 2463 Ionosphere: Plasma convection, 2753 Magnetospheric Physics: Numerical modeling,
Programme: 312;911
|
Okal Emile A, Stein Seth, . (2009). Observations of ultra-long period normal modes from the 2004 SumatraAndaman earthquake
. Physics of the Earth and Planetary Interiors, 175(12), 53–62.
Keywords: Sumatra-Andaman earthquake, Normal modes, Splitting,
Programme: 133
|
Ritsema Jeroen, Xu Wenbo, Stixrude Lars, Lithgow-Bertelloni Carolina, . (2009). Estimates of the transition zone temperature in a mechanically mixed upper mantle
. Earth and Planetary Science Letters, 277(12), 244–252.
Keywords: mantle, mechanical mixing, mineral physics, travel times, temperature,
Programme: 133
|
Zhang Yang, Ritsema Jeroen, Thorne Michael S, . (2009). Modeling the ratios of SKKS and SKS amplitudes with ultra-low velocity zones at the core-mantle boundary
. Geophys. Res. Lett., 36(19), L19303–.
Keywords: core-mantle boundary, SKS waves, amplitudes, 7203 Seismology: Body waves, 7208 Seismology: Mantle, 0545 Computational Geophysics: Modeling,
Programme: 133
|
. (2010). Fatty acid signature analysis documents the diet of five myctophid fish from the Southern Ocean
. Marine Biology, 157(10), 2303–2316.
Abstract: Fatty acid (FA) and fatty alcohol (FAlc) compositions of both total lipid and neutral lipid fractions were studied for five myctophid species sampled in Kerguelen waters. Both qualitative and quantitative FA signature analyses were then performed to investigate their diet over longer time scales than the conventional stomach content analysis. Regarding their lipid class, FA and FAlc compositions, the five species could be discriminated into two groups: wax-ester-rich species ( Electrona antarctica , Krefftichthys anderssoni ) characterised by large amounts of monounsaturated FAs (>73% of total FAs) and triacylglycerol-rich species ( Electrona carlsbergi , Gymnoscopelus nicholsi , Protomyctophum bolini ) with major amounts of saturated and monounsaturated FAs (>29 and >46% of total FAs, respectively). Qualitative and quantitative FA analyses showed that K. anderssoni mainly preyed upon copepods, E. antarctica upon copepods and more euphausiids and P. bolini and E. carlsbergi mainly upon euphausiids with some copepods, while G. nicholsi had a more diverse diet. This study shows the usefulness of quantitative statistical analysis to determine the diet of Antarctic and sub-Antarctic predators and stresses the need of increasing the lipid and FA analyses of more zooplanktonic and micro-nektonic marine species.
Keywords: Biomedical and Life Sciences,
Programme: 109
|
G. Ekstrom, M Nettles, A.M. Dziewonski. (2012). The global CMT project 2004-2010: Centroid-moment tensors for 13,017 earthquakes. Physics of the Earth and Planetary Interiors, 200-201.
Keywords: Centroid-moment tensor; Earthquakes; Global seismicity
Programme: 133
|
Dragon Anne-Cecile, Monestiez P, Bar-Hen A, Guinet C, . (2010). Linking foraging behaviour to physical oceanographic structures: Southern elephant seals and mesoscale eddies east of Kerguelen Islands
. Progress In Oceanography, 87(14), 61–71.
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
|