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. (2021). (Vol. 33).
Keywords: Antarctic Cold Reversal glacier fluctuations Holocene in situ cosmogenic chlorine-36 dating palaeoclimate sub-Antarctic
Programme: 1048
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. (2021). Contribution of toothfish depredated on fishing lines to the energy intake of killer whales off the Crozet Islands: a multi-scale bioenergetic approach (Vol. 668).
Abstract: Fisheries modify prey availability for marine predators by extracting resources but also by providing them with new feeding opportunities. Among these, depredation, which occurs when predators feed on fish caught on fishing gear, is a behavior developed by many species as a way to acquire food through limited foraging effort. However, the extent to which depredated resources from fisheries contribute to the energetic requirements and affect the demography of depredating individuals is unknown. We investigated the contribution of Patagonian toothfish Dissostichus eleginoides depredated on longlines to the energetic requirements of killer whales Orcinus orca around the Crozet Islands (southern Indian Ocean) over the period 2007-2018. Our results indicate that during days when depredation occurred, depredating individuals fulfilled on average 94.1% of their daily energetic requirements with depredated toothfish. However, the contribution varied from 1.2 to 13.3% of the monthly energetic requirements and from 2.4 to 8.8% of the yearly energetic requirements of the total population. Together, these findings suggest that intake of depredated toothfish can be substantial at a fine scale (daily and individually), potentially leading to temporary provisioning effects and changes in predation pressures. These effects become minor (<10%), however, when considering the full population over a whole year. The contribution of depredated fish to the annual energetic requirements of the population has increased in recent years, likely due to larger fishing quotas and greater opportunities for whales to depredate, which stresses the importance of accounting for depredation in ecosystem-based management of fishing activity.
Keywords: Bioenergetic model Depredation Dissostichus eleginoides Ecosystem-based management Fisheries interaction Marine mammals Orcinus orca Top predator conservation
Programme: 109
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John P. Whiteman, Seth D. Newsome, Paco Bustamante, Yves Cherel, Keith A. Hobson. (2021). Quantifying capital versus income breeding: New promise with stable isotope measurements of individual amino acids (Vol. 90).
Keywords: carbon-13 compound-specific isotope analysis CSIA discrimination fasting fractionation nitrogen-15
Programme: 109
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. (2021). Antarctic Atmospheric River Climatology and Precipitation Impacts (Vol. 126).
Keywords: Antarctica atmospheric rivers climatology meteorology
Programme: 411
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Jouanneau W.; Léandri-breton D-j.; Herzke D.; Moe B.; Nikiforov V. A.; Pallud M.; Parenteau C.; Gabrielsen G. W.; Chastel O. (2021). Maternal transfer of contaminants and endocrine disruption in an Arctic seabird.
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. (2021). Scouring by rafted ice and cryogenic patterned ground preserved in a Palaeoproterozoic equatorial proglacial lagoon succession, eastern India, Nuna supercontinent (Vol. 123).
Keywords: Ice-rafted debris Iceberg scouring India Palaeoproterozoic Permafrost Proglacial Reticulate ice
Programme: 316
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. (2021). 10 years of Polar Stratospheric Clouds lidar measurements at the French antarctic station Dumont d'Urville.
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Jun Xie, Risheng Chu, Sidao Ni. (2021). Evaluating Global Tomography Models With Antipodal Ambient Noise Cross-Correlation Functions (Vol. 126).
Keywords: ambient noise cross-correlation functions antipodal surface waves mantle heterogeneity tomography model evaluation
Programme: 133
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Karen D. McCoy. (2021). Community-Level Interactions and Disease Dynamics.
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. (2021). Factors affecting adult body condition in the endangered northern rockhopper penguin (Vol. 168). Bachelor's thesis, , .
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