Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic
Pelagic fish are an important component of Antarctic food webs but few quantitative data exist on energy transfer from fish to seabirds for the Seasonal Pack-ice Zone. We studied a local population of south polar, skuas Catharacta maccormicki during a whole breeding cycle and estimated its entire an...
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Online Access: | https://pure.knaw.nl/portal/en/publications/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 https://doi.org/10.1007/s00300-008-0436-x https://hdl.handle.net/20.500.11755/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 |
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ftknawnlpublic:oai:pure.knaw.nl:publications/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 2024-09-15T17:43:00+00:00 Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic Hahn, S.M. Ritz, M.S. Reinhardt, K. 2008 https://pure.knaw.nl/portal/en/publications/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 https://doi.org/10.1007/s00300-008-0436-x https://hdl.handle.net/20.500.11755/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 eng eng https://pure.knaw.nl/portal/en/publications/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 info:eu-repo/semantics/closedAccess Hahn , S M , Ritz , M S & Reinhardt , K 2008 , ' Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic ' , Polar Biology , vol. 31 , no. 8 , pp. 959-969 . https://doi.org/10.1007/s00300-008-0436-x article 2008 ftknawnlpublic https://doi.org/10.1007/s00300-008-0436-x20.500.11755/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 2024-07-22T23:43:54Z Pelagic fish are an important component of Antarctic food webs but few quantitative data exist on energy transfer from fish to seabirds for the Seasonal Pack-ice Zone. We studied a local population of south polar, skuas Catharacta maccormicki during a whole breeding cycle and estimated its entire annual food consumption. The lengths of foraging trips suggested that skuas foraged in an area of 817 km2 of coastal waters around the breeding site. Their fish prey consisted almost entirely of two pelagic species, Electrona antarctica and Pleuragramma antarcticum, with individual mean energy contents of 28.62 and 30.26 kJ/g dry weight and body masses of 4.6 and 10.9 g, respectively. Total energy budget estimates of the entire south polar skua population resulted in 3 and 5 tons of pelagic fish caught per season (1994 and 2001, respectively), wherein a single breeding pair raising two chicks requires approximately 115.7 kg E. antarctica and 24.4 kg P. antarcticum. Our study suggests that the pelagic fish in coastal areas are highly important for surface feeding seabirds in the maritime Antarctic. Pelagic fish are an important component of Antarctic food webs but few quantitative data exist on energy transfer from fish to seabirds for the Seasonal Pack-ice Zone. We studied a local population of south polar, skuas Catharacta maccormicki during a whole breeding cycle and estimated its entire annual food consumption. The lengths of foraging trips suggested that skuas foraged in an area of 817 km2 of coastal waters around the breeding site. Their fish prey consisted almost entirely of two pelagic species, Electrona antarctica and Pleuragramma antarcticum, with individual mean energy contents of 28.62 and 30.26 kJ/g dry weight and body masses of 4.6 and 10.9 g, respectively. Total energy budget estimates of the entire south polar skua population resulted in 3 and 5 tons of pelagic fish caught per season (1994 and 2001, respectively), wherein a single breeding pair raising two chicks requires approximately 115.7 kg E. ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Catharacta maccormicki E. Antarctica Polar Biology South Polar Skuas Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) Polar Biology 31 8 959 969 |
institution |
Open Polar |
collection |
Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) |
op_collection_id |
ftknawnlpublic |
language |
English |
description |
Pelagic fish are an important component of Antarctic food webs but few quantitative data exist on energy transfer from fish to seabirds for the Seasonal Pack-ice Zone. We studied a local population of south polar, skuas Catharacta maccormicki during a whole breeding cycle and estimated its entire annual food consumption. The lengths of foraging trips suggested that skuas foraged in an area of 817 km2 of coastal waters around the breeding site. Their fish prey consisted almost entirely of two pelagic species, Electrona antarctica and Pleuragramma antarcticum, with individual mean energy contents of 28.62 and 30.26 kJ/g dry weight and body masses of 4.6 and 10.9 g, respectively. Total energy budget estimates of the entire south polar skua population resulted in 3 and 5 tons of pelagic fish caught per season (1994 and 2001, respectively), wherein a single breeding pair raising two chicks requires approximately 115.7 kg E. antarctica and 24.4 kg P. antarcticum. Our study suggests that the pelagic fish in coastal areas are highly important for surface feeding seabirds in the maritime Antarctic. Pelagic fish are an important component of Antarctic food webs but few quantitative data exist on energy transfer from fish to seabirds for the Seasonal Pack-ice Zone. We studied a local population of south polar, skuas Catharacta maccormicki during a whole breeding cycle and estimated its entire annual food consumption. The lengths of foraging trips suggested that skuas foraged in an area of 817 km2 of coastal waters around the breeding site. Their fish prey consisted almost entirely of two pelagic species, Electrona antarctica and Pleuragramma antarcticum, with individual mean energy contents of 28.62 and 30.26 kJ/g dry weight and body masses of 4.6 and 10.9 g, respectively. Total energy budget estimates of the entire south polar skua population resulted in 3 and 5 tons of pelagic fish caught per season (1994 and 2001, respectively), wherein a single breeding pair raising two chicks requires approximately 115.7 kg E. ... |
format |
Article in Journal/Newspaper |
author |
Hahn, S.M. Ritz, M.S. Reinhardt, K. |
spellingShingle |
Hahn, S.M. Ritz, M.S. Reinhardt, K. Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic |
author_facet |
Hahn, S.M. Ritz, M.S. Reinhardt, K. |
author_sort |
Hahn, S.M. |
title |
Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic |
title_short |
Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic |
title_full |
Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic |
title_fullStr |
Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic |
title_full_unstemmed |
Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic |
title_sort |
marine foraging and annual fish consumption of a south polar skua population in the maritime antarctic |
publishDate |
2008 |
url |
https://pure.knaw.nl/portal/en/publications/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 https://doi.org/10.1007/s00300-008-0436-x https://hdl.handle.net/20.500.11755/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 |
genre |
Antarc* Antarctic Antarctica Catharacta maccormicki E. Antarctica Polar Biology South Polar Skuas |
genre_facet |
Antarc* Antarctic Antarctica Catharacta maccormicki E. Antarctica Polar Biology South Polar Skuas |
op_source |
Hahn , S M , Ritz , M S & Reinhardt , K 2008 , ' Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic ' , Polar Biology , vol. 31 , no. 8 , pp. 959-969 . https://doi.org/10.1007/s00300-008-0436-x |
op_relation |
https://pure.knaw.nl/portal/en/publications/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s00300-008-0436-x20.500.11755/be8ec1da-aba3-4b04-bf9f-9805aa7578d8 |
container_title |
Polar Biology |
container_volume |
31 |
container_issue |
8 |
container_start_page |
959 |
op_container_end_page |
969 |
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1810489836644073472 |