Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula
The population trend over the last decade for subantarctic fur seals (Arctocephalus tropicalis) on Amsterdam and St. Paul islands and on Possession Island (Crozet Archipelago) and Antarctic fur seals (A. gazella) on Possession Island are analysed. At Amsterdam Island, based on pup counts, the subant...
Published in: | Antarctic Science |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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1994
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Online Access: | https://pure.knaw.nl/portal/en/publications/bb69b9a7-aa0f-486c-90ca-3248338e271f https://doi.org/10.1017/S0954102094000702 https://hdl.handle.net/20.500.11755/bb69b9a7-aa0f-486c-90ca-3248338e271f https://pure.knaw.nl/ws/files/478704/Gremmen_ea_0750.pdf |
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ftknawnlpublic:oai:pure.knaw.nl:publications/bb69b9a7-aa0f-486c-90ca-3248338e271f 2024-01-28T09:58:23+01:00 Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula Gremmen, N.J.M. Huiskes, A.H.L. Francke, J.W. 1994 application/pdf https://pure.knaw.nl/portal/en/publications/bb69b9a7-aa0f-486c-90ca-3248338e271f https://doi.org/10.1017/S0954102094000702 https://hdl.handle.net/20.500.11755/bb69b9a7-aa0f-486c-90ca-3248338e271f https://pure.knaw.nl/ws/files/478704/Gremmen_ea_0750.pdf eng eng info:eu-repo/semantics/openAccess Gremmen , N J M , Huiskes , A H L & Francke , J W 1994 , ' Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula ' , Antarctic Science , vol. 6 , no. 4 , pp. 463-471 . https://doi.org/10.1017/S0954102094000702 article 1994 ftknawnlpublic https://doi.org/10.1017/S095410209400070220.500.11755/bb69b9a7-aa0f-486c-90ca-3248338e271f 2024-01-03T23:12:37Z The population trend over the last decade for subantarctic fur seals (Arctocephalus tropicalis) on Amsterdam and St. Paul islands and on Possession Island (Crozet Archipelago) and Antarctic fur seals (A. gazella) on Possession Island are analysed. At Amsterdam Island, based on pup counts, the subantarctic fur seal population appears to have stabilized after a period of rapid growth. At Possession Island subantarctic fur seal and Antarctic fur seal, with respective annual growth rates of 19.2 and 17.4%, are reaching the maximum growth rate for the genus Arctocephalus. Annual pup censuses at Possession Island since 1978 indicate important variations from year to year with pup production for A. gazella significantly lower the year after an El Niño Southern Oscillation (ENSO) event, but with no such relationship for A. tropicalis. Several other long term demographic studies of seabirds and marine mammals at different breeding locations in the Southern Ocean indicate that the breeding success of several of these predators appears to be widely affected in years which appear to be related to the ENSO events. To clarify this, it is necessary to analyse in more detail the demographic data obtained for the different subantarctic and Antarctic locations where long term monitoring programmes are conducted. The population trend over the last decade for subantarctic fur seals (Arctocephalus tropicalis) on Amsterdam and St. Paul islands and on Possession Island (Crozet Archipelago) and Antarctic fur seals (A. gazella) on Possession Island are analysed. At Amsterdam Island, based on pup counts, the subantarctic fur seal population appears to have stabilized after a period of rapid growth. At Possession Island subantarctic fur seal and Antarctic fur seal, with respective annual growth rates of 19.2 and 17.4%, are reaching the maximum growth rate for the genus Arctocephalus. Annual pup censuses at Possession Island since 1978 indicate important variations from year to year with pup production for A. gazella significantly lower ... Article in Journal/Newspaper Amsterdam Island Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Antarctic Peninsula Antarctic Science Argentine Islands Paul Islands Possession Island Southern Ocean KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) Antarctic Antarctic Peninsula Argentine Argentine Islands ENVELOPE(-64.273,-64.273,-65.246,-65.246) Paul Islands ENVELOPE(-63.716,-63.716,-64.283,-64.283) Possession Island ENVELOPE(171.200,171.200,-71.867,-71.867) Southern Ocean Antarctic Science 6 4 463 471 |
institution |
Open Polar |
collection |
KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) |
op_collection_id |
ftknawnlpublic |
language |
English |
description |
The population trend over the last decade for subantarctic fur seals (Arctocephalus tropicalis) on Amsterdam and St. Paul islands and on Possession Island (Crozet Archipelago) and Antarctic fur seals (A. gazella) on Possession Island are analysed. At Amsterdam Island, based on pup counts, the subantarctic fur seal population appears to have stabilized after a period of rapid growth. At Possession Island subantarctic fur seal and Antarctic fur seal, with respective annual growth rates of 19.2 and 17.4%, are reaching the maximum growth rate for the genus Arctocephalus. Annual pup censuses at Possession Island since 1978 indicate important variations from year to year with pup production for A. gazella significantly lower the year after an El Niño Southern Oscillation (ENSO) event, but with no such relationship for A. tropicalis. Several other long term demographic studies of seabirds and marine mammals at different breeding locations in the Southern Ocean indicate that the breeding success of several of these predators appears to be widely affected in years which appear to be related to the ENSO events. To clarify this, it is necessary to analyse in more detail the demographic data obtained for the different subantarctic and Antarctic locations where long term monitoring programmes are conducted. The population trend over the last decade for subantarctic fur seals (Arctocephalus tropicalis) on Amsterdam and St. Paul islands and on Possession Island (Crozet Archipelago) and Antarctic fur seals (A. gazella) on Possession Island are analysed. At Amsterdam Island, based on pup counts, the subantarctic fur seal population appears to have stabilized after a period of rapid growth. At Possession Island subantarctic fur seal and Antarctic fur seal, with respective annual growth rates of 19.2 and 17.4%, are reaching the maximum growth rate for the genus Arctocephalus. Annual pup censuses at Possession Island since 1978 indicate important variations from year to year with pup production for A. gazella significantly lower ... |
format |
Article in Journal/Newspaper |
author |
Gremmen, N.J.M. Huiskes, A.H.L. Francke, J.W. |
spellingShingle |
Gremmen, N.J.M. Huiskes, A.H.L. Francke, J.W. Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula |
author_facet |
Gremmen, N.J.M. Huiskes, A.H.L. Francke, J.W. |
author_sort |
Gremmen, N.J.M. |
title |
Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula |
title_short |
Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula |
title_full |
Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula |
title_fullStr |
Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula |
title_full_unstemmed |
Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula |
title_sort |
epilithic macrolichen vegetation of the argentine islands, antarctic peninsula |
publishDate |
1994 |
url |
https://pure.knaw.nl/portal/en/publications/bb69b9a7-aa0f-486c-90ca-3248338e271f https://doi.org/10.1017/S0954102094000702 https://hdl.handle.net/20.500.11755/bb69b9a7-aa0f-486c-90ca-3248338e271f https://pure.knaw.nl/ws/files/478704/Gremmen_ea_0750.pdf |
long_lat |
ENVELOPE(-64.273,-64.273,-65.246,-65.246) ENVELOPE(-63.716,-63.716,-64.283,-64.283) ENVELOPE(171.200,171.200,-71.867,-71.867) |
geographic |
Antarctic Antarctic Peninsula Argentine Argentine Islands Paul Islands Possession Island Southern Ocean |
geographic_facet |
Antarctic Antarctic Peninsula Argentine Argentine Islands Paul Islands Possession Island Southern Ocean |
genre |
Amsterdam Island Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Antarctic Peninsula Antarctic Science Argentine Islands Paul Islands Possession Island Southern Ocean |
genre_facet |
Amsterdam Island Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Antarctic Peninsula Antarctic Science Argentine Islands Paul Islands Possession Island Southern Ocean |
op_source |
Gremmen , N J M , Huiskes , A H L & Francke , J W 1994 , ' Epilithic macrolichen vegetation of the Argentine Islands, Antarctic Peninsula ' , Antarctic Science , vol. 6 , no. 4 , pp. 463-471 . https://doi.org/10.1017/S0954102094000702 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/S095410209400070220.500.11755/bb69b9a7-aa0f-486c-90ca-3248338e271f |
container_title |
Antarctic Science |
container_volume |
6 |
container_issue |
4 |
container_start_page |
463 |
op_container_end_page |
471 |
_version_ |
1789326681098420224 |