Weddell seal behaviour during an exceptional oceanographic event in the Filchner-Ronne Ice Shelf in 2017

Rapid and regionally contrasting climate changes have been observed around Antarctica. However, our understanding of the impact of these changes on ecosystems remains limited, and there is an urgent need to better identify habitats of Antarctic species. The Weddell seal (Leptonychotes weddellii) is a circumpolar mesopredator and an indicative species of Antarctic marine communities. It has been extensively studied in the western Ross Sea and East Antarctica, and an understanding of its ecology in the Weddell Sea in the wintertime is emerging. We documented the behavioural response(s) of four Weddell seals from February to June in 2017 in the Filchner-Ronne Ice Shelf region and related these to unusual oceanographic conditions in 2017. Unexpectedly, we found that Weddell seals had the longest foraging effort within the outflow of Ice Shelf Water or at its turbulent boundary. They also foraged on the eastern side of the trough from April to June within the Modified Warm Deep Water and seem to take advantage of the unusual conditions of persistent inflow of warm waters through the winter. Linking animal behavioural responses to oceanographic conditions is informative for quantifying rarely recorded events and provides great insight into how predators may respond to changing conditions.

NATURVETENSKAP Geovetenskap och miljövetenskap Oceanografi, hydrologi och vattenresurser hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Oceanography, Hydrology and Water Resources hsv//eng
Antarctic predators
bio-telemetry
foraging behaviour
physical
oceanography
spatial ecology
Weddell Sea
southern elephant seals
ross sea
leptonychotes-weddellii
ecology
habitat
mass
Environmental Sciences & Ecology
Physical Geography
Geology

Ryan, S. (författare)
Roquet, Fabien,1982Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences(Swepub:gu)xroqfa (författare)
Picard, B. (författare)
McMahon, C. R. (författare)
Harcourt, R. (författare)
Hindell, M. (författare)
Le Goff, H. (författare)
Lourenco, A. (författare)
David, Y. (författare)
Sallee, J. B. (författare)
Charrassin, J. B. (författare)
Göteborgs universitetInstitutionen för marina vetenskaper (creator_code:org_t)

Ingår i:Antarctic Science: Cambridge University Press (CUP)33:3, s. 252-2640954-10201365-2079

Av författaren/redakt...: Labrousse, S.; Ryan, S.; Roquet, Fabien, ...; Picard, B.; McMahon, C. R.; Harcourt, R.; visa fler...; Hindell, M.; Le Goff, H.; Lourenco, A.; David, Y.; Sallee, J. B.; Charrassin, J. B ...; visa färre...

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