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Tiphaine Jeanniard du Dot, Andrew W. Trites, John P. Y. Arnould, John R. Speakman, Christophe Guinet. (2018). Trade-offs between foraging efficiency and pup feeding rate of lactating northern fur seals in a declining population (Vol. 600).
Keywords: Diet Foraging efficiency Northern fur seal Pup growth Reproduction success
Programme: 1201
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. (2019). First odyssey beneath the sea ice of juvenile emperor penguins in East Antarctica (Vol. 609). Bachelor's thesis, , .
Keywords: Antarctic ecology Aptenodytes forsteri Diving behavior Emperor penguins Foraging ecology Juvenile behavior Oceanographic conditions Sea ice Thermocline
Programme: 109,394
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. (2019). Importance of toothfish in the diet of generalist subantarctic killer whales: implications for fisheries interactions (Vol. 613).
Keywords: Diet Fisheries Fishery interactions Killer whale Southern Ocean Stable isotopes
Programme: 109
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C. Michelot, A. Kato, T. Raclot, K. Shiomi, P. Goulet, P. Bustamante, Y. Ropert-Coudert. (2020). (Vol. 640).
Keywords: Colony Diet GPS Incubation trip Pygoscelis adeliae Sea-ice edge Stable isotopes
Programme: 1091
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. (2021). Long-term tracking of an Arctic-breeding seabird indicates high fidelity for pelagic wintering areas.
Abstract: Site fidelity is driven by predictable resource distributions in time and space. However, intrinsic factors related to an individual’s physiology and life-history traits can contribute to consistent foraging behaviour and movement patterns. Using 11 years of continuous geolocation tracking data (fall 2008 to spring 2019), we investigated spatiotemporal consistency in non-breeding movements in a pelagic seabird population of black-legged kittiwakes (Rissa tridactyla) breeding in the High Arctic (Svalbard). Our objective was to assess the relative importance of spatial versus temporal repeatability behind inter-annual movement consistency during winter. Most kittiwakes used pelagic regions of the western North Atlantic. Winter site fidelity was high both within and across individuals and at meso (100-1000 km) and macro scales (>1000 km). Spatial consistency in non-breeding movement was higher within than among individuals, suggesting that site fidelity might emerge from individuals’ memory to return to locations with predictable resource availability. Consistency was also stronger in space than in time, suggesting that it was driven by consistent resource pulses that may vary in time more so than in space. Nonetheless, some individuals displayed more flexibility by adopting a strategy of itinerancy during winter, and the causes of this flexibility are unclear. Specialization for key wintering areas can indicate vulnerability to environmental perturbations, with winter survival and carry-over effects arising from winter conditions as potential drivers of population dynamics
Programme: 330
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. (2017). Evaluation of Antarctic snowfall in global meteorological reanalyses (Vol. 190).
Keywords: Antarctica CloudSat Meteorological analyses Precipitation
Programme: 1013
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. (2018). How do fishing practices influence sperm whale (Physeter macrocephalus) depredation on demersal longline fisheries? (Vol. 206).
Abstract: Marine mammal depredation on fisheries (animals removing fish caught on fishing gear) is a worldwide issue involving socio-economic and ecological consequences. Longline fisheries are the most impacted by odontocete (toothed whales) depredation. While technological means have provided limited efficacy in reducing depredation, this study examined the fishing practices influencing both the proportion of depredated longline sets and the amount of fish removed by whales. We used an 8-year dataset from the Patagonian toothfish (Dissostichus eleginoides) longline fisheries operating in Crozet and Kerguelen Economic Exclusive Zones (EEZs) (South Indian Ocean) and GLMMs to investigate sperm whale (Physeter macrocephalus) depredation. Sperm whale depredation occurred on 61% of 5260 sets in Crozet and 41% of 16,902 sets in Kerguelen, and resulted in minimum estimated toothfish losses of 702 tons and 2649 tons, respectively, in the two areas. The probability of depredation decreased in winter months, increased with depth fished and decreased when vessels travelled over distances of >60?km from fishing grounds with encountering depredation. These findings suggest the natural spatio-temporal distribution of sperm whales and their ability to follow vessels over limited ranges influence the number of captured fish removals. The amount of depredated toothfish decreased with the speed at which longline sets were hauled and increased with the soaking time of sets suggesting that whales may depredate sets during both hauling and soaking operations. Together, these observations indicate that rates of depredation may be influenced by the conditions of fishing operations and could therefore be employed to implement strategies of avoidance in all fisheries facing similar depredation impacts.
Keywords: Demersal longline Depredation Fishing practices Patagonian toothfish Sperm whale
Programme: 109
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A. B. Makhado, R. J. M. Crawford, M. P. Dias, B. M. Dyer, T. Lamont, P. Pistorius, P. G. Ryan, L. Upfold, H. Weimerskirch, R. R. Reisinger. (2018). Foraging behaviour and habitat use by Indian Yellow-nosed Albatrosses (Thalassarche carteri) breeding at Prince Edward Island (Vol. 118).
Abstract: Demographic parameters of wild animals are often closely associated with their foraging distribution and behaviour, and understanding these attributes can assist in identifying causes of population changes. The Indian Yellow-nosed Albatross (Thalassarche carteri) is endangered but little information is available on its at-sea distribution and behaviour. It breeds only in French (Iles Amsterdam, St Paul, Kerguelen and Crozet) and South African (Prince Edward Island, PEI) territories in the south-west Indian Ocean, with PEI supporting about 20% of the global population. This study aimed to investigate the at-sea distributions of adult Indian Yellow-nosed Albatrosses provisioning chicks at PEI and to compare them with distributions of Yellow-nosed Albatrosses breeding at other localities. Using satellite transmitters, we identified two areas that were particularly favoured for foraging. Parents whose partners were brooding small chicks frequently moved north-east of PEI to shallow, productive waters where cold, nutrient-rich water upwells and results in enhanced levels of chlorophyll-a. By contrast, parents with older chicks that could be left unattended often foraged along the Agulhas Bank where eddies and shear forces promote vertical mixing. The at-sea distribution of birds breeding at PEI was located between those reported for Indian Yellow-nosed Albatrosses breeding at Ile Amsterdam and Atlantic Yellow-nosed Albatrosses (T. chlororhynchos) breeding at Gough Island, so that birds from these localities may face different threats at sea. Our study is the first to highlight key feeding areas for Indian Yellow-nosed Albatrosses from PEI and to demonstrate partitioning of foraging grounds by Yellow-nosed Albatrosses from different localities.
Keywords: Environmental parameters Feeding habitat characteristics foraging ground partitioning seabirds state-space model
Programme: 109
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. (2017). Investigation of the influence of the position inside a small aircraft on the cosmic-radiation-induced dose (Vol. 176).
Abstract: Abstract. This article report the measurements on-board a small aircraft at the same altitude and around the same geographic coordinates. The measurements of A
Programme: 1112
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J. Serafini, J.-P. Barriot, L. Sichoix. (2014). The evolution of precipitable water and precipitation over the Island of Tahiti from hourly to seasonal periods (Vol. 35).
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