The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer
Antarctic Arctocephalus gazella and subantarctic Arctocephalus tropicalis fur seals breed sympatrically at Macquarie Island. The two species have different lactation strategies, the former rearing its pup in 4 months and the latter taking 10 months. The diet and at-sea foraging behaviour of these sy...
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Language: | English |
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2002
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Online Access: | https://doi.org/10.1071/MF01218 http://ecite.utas.edu.au/25189 |
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ftunivtasecite:oai:ecite.utas.edu.au:25189 2023-05-15T13:59:07+02:00 The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer Robinson, S Goldsworthy, SD van den Hoff, J Hindell, MA 2002 https://doi.org/10.1071/MF01218 http://ecite.utas.edu.au/25189 en eng CSIRO Publishing http://dx.doi.org/10.1071/MF01218 Robinson, S and Goldsworthy, SD and van den Hoff, J and Hindell, MA, The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer, Marine and Freswater Research, 53, (7) pp. 1071-1082. ISSN 1323-1650 (2002) [Refereed Article] http://ecite.utas.edu.au/25189 Environmental Sciences Environmental Science and Management Wildlife and Habitat Management Refereed Article PeerReviewed 2002 ftunivtasecite https://doi.org/10.1071/MF01218 2019-12-13T21:06:23Z Antarctic Arctocephalus gazella and subantarctic Arctocephalus tropicalis fur seals breed sympatrically at Macquarie Island. The two species have different lactation strategies, the former rearing its pup in 4 months and the latter taking 10 months. The diet and at-sea foraging behaviour of these sympatric species was compared during the austral summer period when their pup rearing period overlapped. The prey of the two fur seal species was very similar, with fish dominating the diet. The myctophid, Electrona subaspera, was the main prey item (93.9%) in all months of the study. There were no major differences in the diving behaviour between species. Both species foraged north of the island parallel to the Macquarie Ridge. Foraging activity was concentrated at two sites: (i) within 30 km north of the island; and (ii) at 60 km north. Most locations for overnight foraging trips were within 10 km of the colonies. The different lactation strategies of A. gazella and A. tropicalis allowed for flexibility in foraging behaviour. At Macquarie Island, the local marine environmental conditions have resulted in similar foraging behaviour for both species. Article in Journal/Newspaper Antarc* Antarctic Arctocephalus gazella Macquarie Island eCite UTAS (University of Tasmania) Antarctic Austral Marine and Freshwater Research 53 7 1071 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Environmental Sciences Environmental Science and Management Wildlife and Habitat Management |
spellingShingle |
Environmental Sciences Environmental Science and Management Wildlife and Habitat Management Robinson, S Goldsworthy, SD van den Hoff, J Hindell, MA The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer |
topic_facet |
Environmental Sciences Environmental Science and Management Wildlife and Habitat Management |
description |
Antarctic Arctocephalus gazella and subantarctic Arctocephalus tropicalis fur seals breed sympatrically at Macquarie Island. The two species have different lactation strategies, the former rearing its pup in 4 months and the latter taking 10 months. The diet and at-sea foraging behaviour of these sympatric species was compared during the austral summer period when their pup rearing period overlapped. The prey of the two fur seal species was very similar, with fish dominating the diet. The myctophid, Electrona subaspera, was the main prey item (93.9%) in all months of the study. There were no major differences in the diving behaviour between species. Both species foraged north of the island parallel to the Macquarie Ridge. Foraging activity was concentrated at two sites: (i) within 30 km north of the island; and (ii) at 60 km north. Most locations for overnight foraging trips were within 10 km of the colonies. The different lactation strategies of A. gazella and A. tropicalis allowed for flexibility in foraging behaviour. At Macquarie Island, the local marine environmental conditions have resulted in similar foraging behaviour for both species. |
format |
Article in Journal/Newspaper |
author |
Robinson, S Goldsworthy, SD van den Hoff, J Hindell, MA |
author_facet |
Robinson, S Goldsworthy, SD van den Hoff, J Hindell, MA |
author_sort |
Robinson, S |
title |
The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer |
title_short |
The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer |
title_full |
The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer |
title_fullStr |
The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer |
title_full_unstemmed |
The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer |
title_sort |
foraging ecology of two sympatric fur seal species, arctocephalus gazella and arctocephalus tropicalis , at macquarie island during the austral summer |
publisher |
CSIRO Publishing |
publishDate |
2002 |
url |
https://doi.org/10.1071/MF01218 http://ecite.utas.edu.au/25189 |
geographic |
Antarctic Austral |
geographic_facet |
Antarctic Austral |
genre |
Antarc* Antarctic Arctocephalus gazella Macquarie Island |
genre_facet |
Antarc* Antarctic Arctocephalus gazella Macquarie Island |
op_relation |
http://dx.doi.org/10.1071/MF01218 Robinson, S and Goldsworthy, SD and van den Hoff, J and Hindell, MA, The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis , at Macquarie Island during the austral summer, Marine and Freswater Research, 53, (7) pp. 1071-1082. ISSN 1323-1650 (2002) [Refereed Article] http://ecite.utas.edu.au/25189 |
op_doi |
https://doi.org/10.1071/MF01218 |
container_title |
Marine and Freshwater Research |
container_volume |
53 |
container_issue |
7 |
container_start_page |
1071 |
_version_ |
1766267523616997376 |