Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events
We identified a range of foraging strategies adopted by grey-headed albatrosses Thalassarche chrysostoma rearing chicks at Bird Island, South Georgia, by simultaneously using satellite telemetry, wet/dry activity recorders and stomach temperature loggers. The albatrosses foraged mostly over oceanic...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/12114/ https://nora.nerc.ac.uk/id/eprint/12114/1/m280p261.pdf http://www.int-res.com/articles/meps2004/280/m280p261.pdf |
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ftnerc:oai:nora.nerc.ac.uk:12114 2023-05-15T13:45:10+02:00 Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events Catry, Paulo Phillips, Richard A. Phalan, Ben Silk, Janet R.D. Croxall, John P. 2004 text http://nora.nerc.ac.uk/id/eprint/12114/ https://nora.nerc.ac.uk/id/eprint/12114/1/m280p261.pdf http://www.int-res.com/articles/meps2004/280/m280p261.pdf en eng Inter-Research https://nora.nerc.ac.uk/id/eprint/12114/1/m280p261.pdf Catry, Paulo; Phillips, Richard A.; Phalan, Ben; Silk, Janet R.D.; Croxall, John P. 2004 Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events. Marine Ecology Progress Series, 280. 261-273. https://doi.org/10.3354/meps280261 <https://doi.org/10.3354/meps280261> Marine Sciences Zoology Ecology and Environment Publication - Article PeerReviewed 2004 ftnerc https://doi.org/10.3354/meps280261 2023-02-04T19:27:47Z We identified a range of foraging strategies adopted by grey-headed albatrosses Thalassarche chrysostoma rearing chicks at Bird Island, South Georgia, by simultaneously using satellite telemetry, wet/dry activity recorders and stomach temperature loggers. The albatrosses foraged mostly over oceanic waters, probably associated with the Polar Front north of South Georgia, and also over shelf-slope waters around the Antarctic Peninsula. After leaving the colony, birds commuted to areas with predictable prey concentrations, where they remained for several days. During search periods, birds landed more often and had a higher intake rate, but spent the same proportion of time in flight as on commuting days. Although intake rates were particularly high in shelf-break waters around the Antarctic Peninsula (only one individual foraged in this area), prey were also consumed in reasonable quantities during commuting flights. While at sea, birds spent most (81%) of the day flying, and most (94%) of the night resting on the water. A considerable proportion (26% by mass) of prey was consumed during darkness. The majority of prey were detected and captured during search flights, but 35% were located while sitting on the sea surface. Many ingestion events (up to 27% of the overall food intake) showed temperature signatures characteristic of fluids, suggesting that albatrosses may feed on gelatinous and rapidly digested prey (e.g. salps and jellyfish) much more often than previously suspected. Diet samples delivered to the chicks comprised mostly squid (particularly Martialia hyadesi) and Antarctic krill Euphausia superba. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Bird Island Euphausia superba Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) The Antarctic Marine Ecology Progress Series 280 261 273 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences Zoology Ecology and Environment |
spellingShingle |
Marine Sciences Zoology Ecology and Environment Catry, Paulo Phillips, Richard A. Phalan, Ben Silk, Janet R.D. Croxall, John P. Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events |
topic_facet |
Marine Sciences Zoology Ecology and Environment |
description |
We identified a range of foraging strategies adopted by grey-headed albatrosses Thalassarche chrysostoma rearing chicks at Bird Island, South Georgia, by simultaneously using satellite telemetry, wet/dry activity recorders and stomach temperature loggers. The albatrosses foraged mostly over oceanic waters, probably associated with the Polar Front north of South Georgia, and also over shelf-slope waters around the Antarctic Peninsula. After leaving the colony, birds commuted to areas with predictable prey concentrations, where they remained for several days. During search periods, birds landed more often and had a higher intake rate, but spent the same proportion of time in flight as on commuting days. Although intake rates were particularly high in shelf-break waters around the Antarctic Peninsula (only one individual foraged in this area), prey were also consumed in reasonable quantities during commuting flights. While at sea, birds spent most (81%) of the day flying, and most (94%) of the night resting on the water. A considerable proportion (26% by mass) of prey was consumed during darkness. The majority of prey were detected and captured during search flights, but 35% were located while sitting on the sea surface. Many ingestion events (up to 27% of the overall food intake) showed temperature signatures characteristic of fluids, suggesting that albatrosses may feed on gelatinous and rapidly digested prey (e.g. salps and jellyfish) much more often than previously suspected. Diet samples delivered to the chicks comprised mostly squid (particularly Martialia hyadesi) and Antarctic krill Euphausia superba. |
format |
Article in Journal/Newspaper |
author |
Catry, Paulo Phillips, Richard A. Phalan, Ben Silk, Janet R.D. Croxall, John P. |
author_facet |
Catry, Paulo Phillips, Richard A. Phalan, Ben Silk, Janet R.D. Croxall, John P. |
author_sort |
Catry, Paulo |
title |
Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events |
title_short |
Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events |
title_full |
Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events |
title_fullStr |
Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events |
title_full_unstemmed |
Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events |
title_sort |
foraging strategies of grey-headed albatrosses thalassarche chrysostoma: integration of movements, activity and feeding events |
publisher |
Inter-Research |
publishDate |
2004 |
url |
http://nora.nerc.ac.uk/id/eprint/12114/ https://nora.nerc.ac.uk/id/eprint/12114/1/m280p261.pdf http://www.int-res.com/articles/meps2004/280/m280p261.pdf |
long_lat |
ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
geographic |
Antarctic Antarctic Peninsula Bird Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Bird Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Bird Island Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Bird Island Euphausia superba |
op_relation |
https://nora.nerc.ac.uk/id/eprint/12114/1/m280p261.pdf Catry, Paulo; Phillips, Richard A.; Phalan, Ben; Silk, Janet R.D.; Croxall, John P. 2004 Foraging strategies of grey-headed albatrosses Thalassarche chrysostoma: integration of movements, activity and feeding events. Marine Ecology Progress Series, 280. 261-273. https://doi.org/10.3354/meps280261 <https://doi.org/10.3354/meps280261> |
op_doi |
https://doi.org/10.3354/meps280261 |
container_title |
Marine Ecology Progress Series |
container_volume |
280 |
container_start_page |
261 |
op_container_end_page |
273 |
_version_ |
1766214887900446720 |