Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes
The Patagonian slope is the region where Subantarctic waters and bathymetry give raise to physical and ecological processes that support a rich biodiversity and a large-scale industrial fisheries. Unique among the species that depend on this region is the deep diving southern elephant seal, Mirounga...
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ftunivtasecite:oai:ecite.utas.edu.au:151753 2023-05-15T16:05:21+02:00 Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes Aubone, N Saraceno, M Alberto, MLT Campagna, J Le Ster, L Picard, B Hindell, M Campagna, C Guinet, CR 2021 https://doi.org/10.1016/j.jmarsys.2021.103612 http://ecite.utas.edu.au/151753 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.jmarsys.2021.103612 Aubone, N and Saraceno, M and Alberto, MLT and Campagna, J and Le Ster, L and Picard, B and Hindell, M and Campagna, C and Guinet, CR, Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes, Journal of Marine Systems, 223 Article 103612. ISSN 0924-7963 (2021) [Refereed Article] http://ecite.utas.edu.au/151753 Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) Refereed Article PeerReviewed 2021 ftunivtasecite https://doi.org/10.1016/j.jmarsys.2021.103612 2022-10-03T22:16:51Z The Patagonian slope is the region where Subantarctic waters and bathymetry give raise to physical and ecological processes that support a rich biodiversity and a large-scale industrial fisheries. Unique among the species that depend on this region is the deep diving southern elephant seal, Mirounga leonina . We report here on changes in the foraging behavior of a female seal explained by the combined effect of a cold and high salinity water mass and a decrease in surface chlorophyll-a concentration. Behavioral and oceanographic data from about 5000 profiles of temperature, conductivity, pressure, light and prey encounters were collected within an area ranging 59.561W and 4647.5S, at depths of 300700m, on the Patagonian slope, during NovemberDecember 2018. A decrease in temperature (0.15C) and an increase in salinity (0.03) was found below the mixed layer, during December. Light data revealed a significant increase of irradiance in December (almost reaching the ocean bottom) associated with a decrease of chlorophyll-a in the upper levels. Concomitantly, the seal had a different diving behavior in December, foraging near the surface at night and close to the bottom during daylight hours. Also, the seal doubled the prey capture attempts in December compared to November. This study reveals the importance of ocean physical properties on seal's diving and foraging behavior, and how this changes, although small, can impact on seals diet and body composition during their post-breeding trips. Article in Journal/Newspaper Elephant Seal Mirounga leonina Southern Elephant Seal eCite UTAS (University of Tasmania) Journal of Marine Systems 223 103612 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) Aubone, N Saraceno, M Alberto, MLT Campagna, J Le Ster, L Picard, B Hindell, M Campagna, C Guinet, CR Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
topic_facet |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) |
description |
The Patagonian slope is the region where Subantarctic waters and bathymetry give raise to physical and ecological processes that support a rich biodiversity and a large-scale industrial fisheries. Unique among the species that depend on this region is the deep diving southern elephant seal, Mirounga leonina . We report here on changes in the foraging behavior of a female seal explained by the combined effect of a cold and high salinity water mass and a decrease in surface chlorophyll-a concentration. Behavioral and oceanographic data from about 5000 profiles of temperature, conductivity, pressure, light and prey encounters were collected within an area ranging 59.561W and 4647.5S, at depths of 300700m, on the Patagonian slope, during NovemberDecember 2018. A decrease in temperature (0.15C) and an increase in salinity (0.03) was found below the mixed layer, during December. Light data revealed a significant increase of irradiance in December (almost reaching the ocean bottom) associated with a decrease of chlorophyll-a in the upper levels. Concomitantly, the seal had a different diving behavior in December, foraging near the surface at night and close to the bottom during daylight hours. Also, the seal doubled the prey capture attempts in December compared to November. This study reveals the importance of ocean physical properties on seal's diving and foraging behavior, and how this changes, although small, can impact on seals diet and body composition during their post-breeding trips. |
format |
Article in Journal/Newspaper |
author |
Aubone, N Saraceno, M Alberto, MLT Campagna, J Le Ster, L Picard, B Hindell, M Campagna, C Guinet, CR |
author_facet |
Aubone, N Saraceno, M Alberto, MLT Campagna, J Le Ster, L Picard, B Hindell, M Campagna, C Guinet, CR |
author_sort |
Aubone, N |
title |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_short |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_full |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_fullStr |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_full_unstemmed |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_sort |
physical changes recorded by a deep diving seal on the patagonian slope drive large ecological changes |
publisher |
Elsevier Science Bv |
publishDate |
2021 |
url |
https://doi.org/10.1016/j.jmarsys.2021.103612 http://ecite.utas.edu.au/151753 |
genre |
Elephant Seal Mirounga leonina Southern Elephant Seal |
genre_facet |
Elephant Seal Mirounga leonina Southern Elephant Seal |
op_relation |
http://dx.doi.org/10.1016/j.jmarsys.2021.103612 Aubone, N and Saraceno, M and Alberto, MLT and Campagna, J and Le Ster, L and Picard, B and Hindell, M and Campagna, C and Guinet, CR, Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes, Journal of Marine Systems, 223 Article 103612. ISSN 0924-7963 (2021) [Refereed Article] http://ecite.utas.edu.au/151753 |
op_doi |
https://doi.org/10.1016/j.jmarsys.2021.103612 |
container_title |
Journal of Marine Systems |
container_volume |
223 |
container_start_page |
103612 |
_version_ |
1766401242655883264 |