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. (2023). In Situ VTOL Drone-Borne Observations of Temperature and Relative Humidity over Dome C, Antarctica (Vol. 7).
Keywords: Antarctica Concordia station drone free troposphere planetary boundary layer relative humidity temperature VTOL
Programme: 910
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. (2024). Supercooled liquid water clouds observed over Dome C, Antarctica: temperature sensitivity and cloud radiative forcing (Vol. 24).
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. (2024). Tick-borne zoonotic flaviviruses and Borrelia infections in wildlife hosts: What have field studies contributed? (Vol. 18).
Abstract: Tick-borne flaviviruses and Borrelia spp. are globally spread pathogens of zoonotic potential that are maintained by a transmission cycle at the interface between ticks and vertebrate hosts, mainly wild animals. Aside data on pathogen burden in ticks, information on the status of various hosts relative to infection is important to acquire. We reviewed how those infections have been studied in wildlife host species in the field to discuss how collected data provided relevant epidemiological information and to identify needs for further studies. The literature was screened for observational studies on pathogen or antibody detection for tick-borne Borrelia spp. and flaviviruses in wildlife host animals. Overall, Borrelia spp. were more studied (73% of case studies, representing 297 host species) than flaviviruses (27% of case studies, representing 114 host species). Studies on both Borrelia spp. and flaviviruses focused mainly on the same species, namely bank vole and yellow-necked mouse. Most studies were order-specific and cross-sectional, reporting prevalence at various locations, but with little insight into the underlying epidemiological dynamics. Host species with potential to act as reservoir hosts of these pathogens were neglected, notably birds. We highlight the necessity of collecting both demographics and infection data in wildlife studies, and to consider communities of species, to better estimate zoonotic risk potential in the One Health context.
Keywords: Flavivirus Host Reservoir Sentinel Tick-borne diseases Wildlife
Programme: 1151
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. (2023). Keystone seabird may face thermoregulatory challenges in a warming Arctic (Vol. 13).
Abstract: Climate change affects the Arctic more than any other region, resulting in evolving weather, vanishing sea ice and altered biochemical cycling, which may increase biotic exposure to chemical pollution. We tested thermoregulatory impacts of these changes on the most abundant Arctic seabird, the little auk (Alle alle). This small diving species uses sea ice-habitats for foraging on zooplankton and resting. We equipped eight little auks with 3D accelerometers to monitor behavior, and ingested temperature recorders to measure body temperature (Tb). We also recorded weather conditions, and collected blood to assess mercury (Hg) contamination. There were nonlinear relationships between time engaged in different behaviors and Tb. Tb increased on sea ice, following declines while foraging in polar waters, but changed little when birds were resting on water. Tb also increased when birds were flying, and decreased at the colony after being elevated during flight. Weather conditions, but not Hg contamination, also affected Tb. However, given our small sample size, further research regarding thermoregulatory effects of Hg is warranted. Results suggest that little auk Tb varies with behavior and weather conditions, and that loss of sea ice due to global warming may cause thermoregulatory and energic challenges during foraging trips at sea.
Keywords: Climate-change ecology Ecophysiology
Programme: 388
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. (2023). Carryover effects of winter mercury contamination on summer concentrations and reproductive performance in little auks (Vol. 318).
Keywords: Blood Chick growth Feathers Migration Reproduction Seabird Telomeres
Programme: 388
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. (2024). Cold adaptation does not handicap warm tolerance in the most abundant Arctic seabird (Vol. 291).
Keywords: Animal energetics dovekie ecophysiology evolutionary legacy global warming phylogenic analyses
Programme: 388
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. (2023). Diving behaviour of southern elephant seals: new models of behavioural and ecophysiological adjustments of oxygen store management (Vol. 226).
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Clive R. McMahon, Mark A. Hindell, Jean Benoit Charrassin, Richard Coleman, Christophe Guinet, Robert Harcourt, Sara Labrousse, Benjemin Raymond, Michael Sumner, Natalia Ribeiro. (2023). Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf (Vol. 4).
Keywords: Environmental sciences Ocean sciences
Programme: 1201
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. (2019). A miniature biomimetic sonar and movement tag to study the biotic environment and predator-prey interactions in aquatic animals (Vol. 148).
Keywords: Biologging Elephant seal Fisheries sonar Foraging ecology Predator-prey interactions Prey field mapping
Programme: 1201
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Chengbin Peng, Carlos M. Duarte, Daniel P. Costa, Christophe Guinet, Robert G. Harcourt, Mark A. Hindell, Clive R. McMahon, Monica Muelbert, Michele Thums, Ka-Chun Wong, Xiangliang Zhang. (2019). Deep Learning Resolves Representative Movement Patterns in a Marine Predator Species (Vol. 9).
Abstract: The analysis of animal movement from telemetry data provides insights into how and why animals move. While traditional approaches to such analysis mostly focus on predicting animal states during movement, we describe an approach that allows us to identify representative movement patterns of different animal groups. To do this, we propose a carefully designed recurrent neural network and combine it with telemetry data for automatic feature extraction and identification of non-predefined representative patterns. In the experiment, we consider a particular marine predator species, the southern elephant seal, as an example. With our approach, we identify that the male seals in our data set share similar movement patterns when they are close to land. We identify this pattern recurring in a number of distant locations, consistent with alternative approaches from previous research.
Keywords: marine animal movement analysis recurrent neural networks representative patterns
Programme: 1201
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