Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands
The Patagonian Sea is one of the most productive ecosystems in the Southern Hemisphere. Unlike other coastal regions, however, few studies exist on the top predators in its pelagic zone. In March 2017, a survey of seabirds and marine mammals was carried out on board the R/V Puerto Deseado in the Pat...
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ftarcticportal:oai:generic.eprints.org:2650 2023-12-03T10:08:32+01:00 Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands Orgeira, José Luis 2018-03 application/pdf http://library.arcticportal.org/2650/ http://library.arcticportal.org/2650/1/A1801004.pdf en eng Polar Research Institute of China - PRIC http://library.arcticportal.org/2650/1/A1801004.pdf Orgeira, José Luis (2018) Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands. Advances in Polar Science, 29 (1). pp. 25-33. Fauna Oceans Article PeerReviewed 2018 ftarcticportal 2023-11-08T23:54:41Z The Patagonian Sea is one of the most productive ecosystems in the Southern Hemisphere. Unlike other coastal regions, however, few studies exist on the top predators in its pelagic zone. In March 2017, a survey of seabirds and marine mammals was carried out on board the R/V Puerto Deseado in the Patagonian Sea, which extends from the South Atlantic Ocean to the north of the South Orkney Islands, Antarctica. Four of the five oceanographic regimes described in this region were studied, and 23 seabird species and five marine mammal species were recorded. Great shearwater Puffinus gravis, Antarctic prion Pachyptila desolata, and fin whale Balaenoptera physalus were the most abundant species. In the 2615 km traveled, two hotspots for top predators were found, coinciding with frontal zones: one in the shelf-break front and the other in the Southern Front of the Antarctic Circumpolar Current. The highest bird diversity and the greatest cetacean concentrations were recorded in the polar regime in the presence of low ice-field debris (5%). The results suggest that at the end of the austral summer, the distribution of top predators in this section of the South Atlantic Ocean is highly unequal. Some oceanic areas have a few species aggregations which contrast with the vast pelagic areas that have scarce species presence and activity. The hotspots were associated with high-productivity areas, but it is likely that they were also facilitated by the time of year (post-reproductive season), as most of the species were concentrated and had fed prior to their migrations. Article in Journal/Newspaper Advances in Polar Science Antarc* Antarctic Antarctic prion Antarctica Balaenoptera physalus Fin whale Pachyptila desolata Polar Science Polar Science South Atlantic Ocean South Orkney Islands Arctic Portal Library Antarctic The Antarctic Austral South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
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ftarcticportal |
language |
English |
topic |
Fauna Oceans |
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Fauna Oceans Orgeira, José Luis Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands |
topic_facet |
Fauna Oceans |
description |
The Patagonian Sea is one of the most productive ecosystems in the Southern Hemisphere. Unlike other coastal regions, however, few studies exist on the top predators in its pelagic zone. In March 2017, a survey of seabirds and marine mammals was carried out on board the R/V Puerto Deseado in the Patagonian Sea, which extends from the South Atlantic Ocean to the north of the South Orkney Islands, Antarctica. Four of the five oceanographic regimes described in this region were studied, and 23 seabird species and five marine mammal species were recorded. Great shearwater Puffinus gravis, Antarctic prion Pachyptila desolata, and fin whale Balaenoptera physalus were the most abundant species. In the 2615 km traveled, two hotspots for top predators were found, coinciding with frontal zones: one in the shelf-break front and the other in the Southern Front of the Antarctic Circumpolar Current. The highest bird diversity and the greatest cetacean concentrations were recorded in the polar regime in the presence of low ice-field debris (5%). The results suggest that at the end of the austral summer, the distribution of top predators in this section of the South Atlantic Ocean is highly unequal. Some oceanic areas have a few species aggregations which contrast with the vast pelagic areas that have scarce species presence and activity. The hotspots were associated with high-productivity areas, but it is likely that they were also facilitated by the time of year (post-reproductive season), as most of the species were concentrated and had fed prior to their migrations. |
format |
Article in Journal/Newspaper |
author |
Orgeira, José Luis |
author_facet |
Orgeira, José Luis |
author_sort |
Orgeira, José Luis |
title |
Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands |
title_short |
Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands |
title_full |
Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands |
title_fullStr |
Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands |
title_full_unstemmed |
Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands |
title_sort |
occurrence of seabirds and marine mammals in the pelagic zone of the patagonian sea and north of the south orkney islands |
publisher |
Polar Research Institute of China - PRIC |
publishDate |
2018 |
url |
http://library.arcticportal.org/2650/ http://library.arcticportal.org/2650/1/A1801004.pdf |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic The Antarctic Austral South Orkney Islands |
geographic_facet |
Antarctic The Antarctic Austral South Orkney Islands |
genre |
Advances in Polar Science Antarc* Antarctic Antarctic prion Antarctica Balaenoptera physalus Fin whale Pachyptila desolata Polar Science Polar Science South Atlantic Ocean South Orkney Islands |
genre_facet |
Advances in Polar Science Antarc* Antarctic Antarctic prion Antarctica Balaenoptera physalus Fin whale Pachyptila desolata Polar Science Polar Science South Atlantic Ocean South Orkney Islands |
op_relation |
http://library.arcticportal.org/2650/1/A1801004.pdf Orgeira, José Luis (2018) Occurrence of seabirds and marine mammals in the pelagic zone of the Patagonian Sea and north of the South Orkney Islands. Advances in Polar Science, 29 (1). pp. 25-33. |
_version_ |
1784253002505256960 |