Southern elephant seal trajectories, fronts and eddies in the Brazil/Malvinas Confluence

This study describes the association between transient, mesoscale hydrographic features along the axis of the Brazil-Malvinas Confluence, in the SW Atlantic, and the foraging behavior of 2-3-year-old (focal) juvenile southern elephant seals, Mirounga leonina, from Península Valdés, Argentina. Depart...

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Language:unknown
Published: 2006
Subjects:
Online Access:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09670637_v53_n12_p1907_Campagna
https://hdl.handle.net/20.500.12110/paper_09670637_v53_n12_p1907_Campagna
id ftunibueairesbd:paper:paper_09670637_v53_n12_p1907_Campagna
record_format openpolar
spelling ftunibueairesbd:paper:paper_09670637_v53_n12_p1907_Campagna 2023-05-15T16:05:22+02:00 Southern elephant seal trajectories, fronts and eddies in the Brazil/Malvinas Confluence 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09670637_v53_n12_p1907_Campagna https://hdl.handle.net/20.500.12110/paper_09670637_v53_n12_p1907_Campagna unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09670637_v53_n12_p1907_Campagna http://hdl.handle.net/20.500.12110/paper_09670637_v53_n12_p1907_Campagna Eddies (oceanic) Foraging behavior Mirounga leonina Oceanic fronts Telemetry Temporal distribution Bathymetry Coastal zones Eddy currents Ocean currents Seals Telemetering Seawater biotelemetry current direction diurnal variation diving behavior eddy hydrography juvenile movement oceanic front pinniped temperature gradient trajectory Argentina Argentine Basin Atlantic islands Atlantic Ocean Chubut Falkland Islands (Malvinas) Patagonian Shelf South America Valdes Peninsula 2006 ftunibueairesbd https://doi.org/20.500.12110/paper_09670637_v53_n12_p1907_Campagna 2023-02-16T01:58:32Z This study describes the association between transient, mesoscale hydrographic features along the axis of the Brazil-Malvinas Confluence, in the SW Atlantic, and the foraging behavior of 2-3-year-old (focal) juvenile southern elephant seals, Mirounga leonina, from Península Valdés, Argentina. Departing from the dominant pattern of foraging on predictable bathymetric fronts on the Patagonian shelf and slope, three females out of 12 satellite-tracked juveniles remained at the edge of young warm-core eddies and near the outer core of cold-core eddies, coinciding with the most productive areas of these temperature fronts. Seal trajectories along high-temperature gradients were always consistent with the speed and direction of surface currents inferred from the temperature distribution and confirmed by surface drifters. Movements of foraging seals were compared with those of surface drifters, coinciding in time and space and yielding independent and consistent data on regional water circulation parameters. The diving pattern recorded for one focal seal yielded shallower dives and a loose diel pattern in the eddy, and a marked diurnal cycle compatible with foraging on vertically migrating prey in the cold waters of the Malvinas Current. Pre-reproductive females that use the mesoscale fronts of the Argentine Basin as an alternative foraging area would benefit from lower competition with more experienced seals and with other top predators that reproduce along the coast of Patagonia. © 2006 Elsevier Ltd. All rights reserved. Other/Unknown Material Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Argentina Argentine Chubut ENVELOPE(-62.533,-62.533,-76.100,-76.100) Patagonia
institution Open Polar
collection Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
op_collection_id ftunibueairesbd
language unknown
topic Eddies (oceanic)
Foraging behavior
Mirounga leonina
Oceanic fronts
Telemetry
Temporal distribution
Bathymetry
Coastal zones
Eddy currents
Ocean currents
Seals
Telemetering
Seawater
biotelemetry
current direction
diurnal variation
diving behavior
eddy
hydrography
juvenile
movement
oceanic front
pinniped
temperature gradient
trajectory
Argentina
Argentine Basin
Atlantic islands
Atlantic Ocean
Chubut
Falkland Islands (Malvinas)
Patagonian Shelf
South America
Valdes Peninsula
spellingShingle Eddies (oceanic)
Foraging behavior
Mirounga leonina
Oceanic fronts
Telemetry
Temporal distribution
Bathymetry
Coastal zones
Eddy currents
Ocean currents
Seals
Telemetering
Seawater
biotelemetry
current direction
diurnal variation
diving behavior
eddy
hydrography
juvenile
movement
oceanic front
pinniped
temperature gradient
trajectory
Argentina
Argentine Basin
Atlantic islands
Atlantic Ocean
Chubut
Falkland Islands (Malvinas)
Patagonian Shelf
South America
Valdes Peninsula
Southern elephant seal trajectories, fronts and eddies in the Brazil/Malvinas Confluence
topic_facet Eddies (oceanic)
Foraging behavior
Mirounga leonina
Oceanic fronts
Telemetry
Temporal distribution
Bathymetry
Coastal zones
Eddy currents
Ocean currents
Seals
Telemetering
Seawater
biotelemetry
current direction
diurnal variation
diving behavior
eddy
hydrography
juvenile
movement
oceanic front
pinniped
temperature gradient
trajectory
Argentina
Argentine Basin
Atlantic islands
Atlantic Ocean
Chubut
Falkland Islands (Malvinas)
Patagonian Shelf
South America
Valdes Peninsula
description This study describes the association between transient, mesoscale hydrographic features along the axis of the Brazil-Malvinas Confluence, in the SW Atlantic, and the foraging behavior of 2-3-year-old (focal) juvenile southern elephant seals, Mirounga leonina, from Península Valdés, Argentina. Departing from the dominant pattern of foraging on predictable bathymetric fronts on the Patagonian shelf and slope, three females out of 12 satellite-tracked juveniles remained at the edge of young warm-core eddies and near the outer core of cold-core eddies, coinciding with the most productive areas of these temperature fronts. Seal trajectories along high-temperature gradients were always consistent with the speed and direction of surface currents inferred from the temperature distribution and confirmed by surface drifters. Movements of foraging seals were compared with those of surface drifters, coinciding in time and space and yielding independent and consistent data on regional water circulation parameters. The diving pattern recorded for one focal seal yielded shallower dives and a loose diel pattern in the eddy, and a marked diurnal cycle compatible with foraging on vertically migrating prey in the cold waters of the Malvinas Current. Pre-reproductive females that use the mesoscale fronts of the Argentine Basin as an alternative foraging area would benefit from lower competition with more experienced seals and with other top predators that reproduce along the coast of Patagonia. © 2006 Elsevier Ltd. All rights reserved.
title Southern elephant seal trajectories, fronts and eddies in the Brazil/Malvinas Confluence
title_short Southern elephant seal trajectories, fronts and eddies in the Brazil/Malvinas Confluence
title_full Southern elephant seal trajectories, fronts and eddies in the Brazil/Malvinas Confluence
title_fullStr Southern elephant seal trajectories, fronts and eddies in the Brazil/Malvinas Confluence
title_full_unstemmed Southern elephant seal trajectories, fronts and eddies in the Brazil/Malvinas Confluence
title_sort southern elephant seal trajectories, fronts and eddies in the brazil/malvinas confluence
publishDate 2006
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09670637_v53_n12_p1907_Campagna
https://hdl.handle.net/20.500.12110/paper_09670637_v53_n12_p1907_Campagna
long_lat ENVELOPE(-62.533,-62.533,-76.100,-76.100)
geographic Argentina
Argentine
Chubut
Patagonia
geographic_facet Argentina
Argentine
Chubut
Patagonia
genre Elephant Seal
Elephant Seals
Mirounga leonina
Southern Elephant Seal
Southern Elephant Seals
genre_facet Elephant Seal
Elephant Seals
Mirounga leonina
Southern Elephant Seal
Southern Elephant Seals
op_relation https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09670637_v53_n12_p1907_Campagna
http://hdl.handle.net/20.500.12110/paper_09670637_v53_n12_p1907_Campagna
op_doi https://doi.org/20.500.12110/paper_09670637_v53_n12_p1907_Campagna
_version_ 1766401267579486208