Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago
The relationships between the foraging strategy of seabirds, hydrographic features and food availability are poorly understood. We investigated the movements at sea, time spent per oceanic sector, food intake, and diet of king penguins Aptenodytes patagonicus in the Crozet Islands (Southern Indian O...
Published in: | Marine Ecology Progress Series |
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Language: | English |
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InterResearch
1997
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Online Access: | https://oceanrep.geomar.de/id/eprint/52313/ https://oceanrep.geomar.de/id/eprint/52313/1/3223.pdf https://doi.org/10.3354/meps150021 |
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ftoceanrep:oai:oceanrep.geomar.de:52313 2023-05-15T14:01:00+02:00 Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago Bost, CA Georges, JY Guinet, C Cherel, Y Pütz, K Charrassin, JB Handrich, Y Zorn, T Lage, J Le Maho, Y 1997 text https://oceanrep.geomar.de/id/eprint/52313/ https://oceanrep.geomar.de/id/eprint/52313/1/3223.pdf https://doi.org/10.3354/meps150021 en eng InterResearch https://oceanrep.geomar.de/id/eprint/52313/1/3223.pdf Bost, C., Georges, J., Guinet, C., Cherel, Y., Pütz, K., Charrassin, J., Handrich, Y., Zorn, T., Lage, J. and Le Maho, Y. (1997) Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago. Open Access Marine Ecology Progress Series, 150 . pp. 21-33. DOI 10.3354/meps150021 <https://doi.org/10.3354/meps150021>. doi:10.3354/meps150021 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 1997 ftoceanrep https://doi.org/10.3354/meps150021 2023-04-07T15:55:25Z The relationships between the foraging strategy of seabirds, hydrographic features and food availability are poorly understood. We investigated the movements at sea, time spent per oceanic sector, food intake, and diet of king penguins Aptenodytes patagonicus in the Crozet Islands (Southern Indian Ocean) during summer, as a function of the position of major frontal zones. Fifteen trips at sea were monitored using satellite transmitters over 3 austral summers (1992 to 1994). During each season, satellite transmitters were used in conjunction with stomach temperature recorders in order to investigate feeding activity. The at-sea distribution of king penguins was closely related to the localisation of major hydrographic frontal systems. Intense prospecting areas were observed mainly in zones corresponding to the northern limit of the Polar Front (50° to 51° S), southern limit of the Sub-Antarctic Front (44.50° to 45° S), and a zone between 47° and 48° S. During trips directed south, 2 distinct phases based on travelling speed were detected. The myctophids Electrona carlsbergi, Krefftichtys anderssoni and Protomyctophum tenisoni dominated the diet. The estimated average amount of food ingested per day at sea was 2.4 kg. Between 17 and 64 kg of food was captured during 7 to 25 d at sea. Approximately 80% of the food intake occurred during the first phase of the trip. Food intake was related to trip duration and relative amount of time spent in particular oceanic sectors. The sections 47° to 48° S and 48.5° to 50.50° S appeared particularly favorable for food intake, the latter coinciding with the northern limit of the Polar Front. King penguins fed intensively on several distinct patches when traveling towards the Polar Front. The foraging range seems to be related to the foraging success during the first phase of the trip. The foraging strategy of king penguins during the summer favors displacements toward frontal zones where food availability is optimal. Article in Journal/Newspaper Antarc* Antarctic Crozet Islands King Penguins OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Austral Indian Marine Ecology Progress Series 150 21 33 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The relationships between the foraging strategy of seabirds, hydrographic features and food availability are poorly understood. We investigated the movements at sea, time spent per oceanic sector, food intake, and diet of king penguins Aptenodytes patagonicus in the Crozet Islands (Southern Indian Ocean) during summer, as a function of the position of major frontal zones. Fifteen trips at sea were monitored using satellite transmitters over 3 austral summers (1992 to 1994). During each season, satellite transmitters were used in conjunction with stomach temperature recorders in order to investigate feeding activity. The at-sea distribution of king penguins was closely related to the localisation of major hydrographic frontal systems. Intense prospecting areas were observed mainly in zones corresponding to the northern limit of the Polar Front (50° to 51° S), southern limit of the Sub-Antarctic Front (44.50° to 45° S), and a zone between 47° and 48° S. During trips directed south, 2 distinct phases based on travelling speed were detected. The myctophids Electrona carlsbergi, Krefftichtys anderssoni and Protomyctophum tenisoni dominated the diet. The estimated average amount of food ingested per day at sea was 2.4 kg. Between 17 and 64 kg of food was captured during 7 to 25 d at sea. Approximately 80% of the food intake occurred during the first phase of the trip. Food intake was related to trip duration and relative amount of time spent in particular oceanic sectors. The sections 47° to 48° S and 48.5° to 50.50° S appeared particularly favorable for food intake, the latter coinciding with the northern limit of the Polar Front. King penguins fed intensively on several distinct patches when traveling towards the Polar Front. The foraging range seems to be related to the foraging success during the first phase of the trip. The foraging strategy of king penguins during the summer favors displacements toward frontal zones where food availability is optimal. |
format |
Article in Journal/Newspaper |
author |
Bost, CA Georges, JY Guinet, C Cherel, Y Pütz, K Charrassin, JB Handrich, Y Zorn, T Lage, J Le Maho, Y |
spellingShingle |
Bost, CA Georges, JY Guinet, C Cherel, Y Pütz, K Charrassin, JB Handrich, Y Zorn, T Lage, J Le Maho, Y Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago |
author_facet |
Bost, CA Georges, JY Guinet, C Cherel, Y Pütz, K Charrassin, JB Handrich, Y Zorn, T Lage, J Le Maho, Y |
author_sort |
Bost, CA |
title |
Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago |
title_short |
Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago |
title_full |
Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago |
title_fullStr |
Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago |
title_full_unstemmed |
Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago |
title_sort |
foraging habitat and food intake of satellite-tracked king penguins during the austral summer at crozet archipelago |
publisher |
InterResearch |
publishDate |
1997 |
url |
https://oceanrep.geomar.de/id/eprint/52313/ https://oceanrep.geomar.de/id/eprint/52313/1/3223.pdf https://doi.org/10.3354/meps150021 |
geographic |
Antarctic Austral Indian |
geographic_facet |
Antarctic Austral Indian |
genre |
Antarc* Antarctic Crozet Islands King Penguins |
genre_facet |
Antarc* Antarctic Crozet Islands King Penguins |
op_relation |
https://oceanrep.geomar.de/id/eprint/52313/1/3223.pdf Bost, C., Georges, J., Guinet, C., Cherel, Y., Pütz, K., Charrassin, J., Handrich, Y., Zorn, T., Lage, J. and Le Maho, Y. (1997) Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago. Open Access Marine Ecology Progress Series, 150 . pp. 21-33. DOI 10.3354/meps150021 <https://doi.org/10.3354/meps150021>. doi:10.3354/meps150021 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps150021 |
container_title |
Marine Ecology Progress Series |
container_volume |
150 |
container_start_page |
21 |
op_container_end_page |
33 |
_version_ |
1766270439466729472 |