Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia
The diet of the Antarctic Prion Pachyptila desolata was examined using food samples regurgitated by adult birds during five breeding seasons at Bird Island, South Georgia. In all years the diet was mainly crustaceans, with a small proportion of myctophid fish and trace amounts of ephalopods. Antarct...
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birdl;ife Australia
1997
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Online Access: | http://nora.nerc.ac.uk/id/eprint/514685/ https://doi.org/10.1071/MU97016 |
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ftnerc:oai:nora.nerc.ac.uk:514685 2023-05-15T13:49:33+02:00 Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia Reid, Keith Croxall, John P. Edwards, Tracy M. 1997 http://nora.nerc.ac.uk/id/eprint/514685/ https://doi.org/10.1071/MU97016 unknown birdl;ife Australia Reid, Keith; Croxall, John P.; Edwards, Tracy M. 1997 Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia. EMU, 97 (2). 126-132. https://doi.org/10.1071/MU97016 <https://doi.org/10.1071/MU97016> Publication - Article PeerReviewed 1997 ftnerc https://doi.org/10.1071/MU97016 2023-02-04T19:43:37Z The diet of the Antarctic Prion Pachyptila desolata was examined using food samples regurgitated by adult birds during five breeding seasons at Bird Island, South Georgia. In all years the diet was mainly crustaceans, with a small proportion of myctophid fish and trace amounts of ephalopods. Antarctic krill Euphausia superba was the dominant prey item in three years and was replaced by calanoid copepods, especially Rhincalanus gigas and Calanoides acutus, in two years of low krill abundance. Differences in the prey species taken and observations of foraging behaviour suggest that in years of low krill availability Antarctic Prions forage closer inshore, taking copepods by filtering surface water through their palatal lamellae. By switching to feeding on copepods Antarctic Prions are apparently able to maintain a comparable level of reproductive success, unlike most other krill feeding species which suffer much reduced reproductive performance in years of reduced krill availability. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic prion Bird Island Euphausia superba Pachyptila desolata Copepods Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) Emu - Austral Ornithology 97 2 126 132 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
The diet of the Antarctic Prion Pachyptila desolata was examined using food samples regurgitated by adult birds during five breeding seasons at Bird Island, South Georgia. In all years the diet was mainly crustaceans, with a small proportion of myctophid fish and trace amounts of ephalopods. Antarctic krill Euphausia superba was the dominant prey item in three years and was replaced by calanoid copepods, especially Rhincalanus gigas and Calanoides acutus, in two years of low krill abundance. Differences in the prey species taken and observations of foraging behaviour suggest that in years of low krill availability Antarctic Prions forage closer inshore, taking copepods by filtering surface water through their palatal lamellae. By switching to feeding on copepods Antarctic Prions are apparently able to maintain a comparable level of reproductive success, unlike most other krill feeding species which suffer much reduced reproductive performance in years of reduced krill availability. |
format |
Article in Journal/Newspaper |
author |
Reid, Keith Croxall, John P. Edwards, Tracy M. |
spellingShingle |
Reid, Keith Croxall, John P. Edwards, Tracy M. Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia |
author_facet |
Reid, Keith Croxall, John P. Edwards, Tracy M. |
author_sort |
Reid, Keith |
title |
Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia |
title_short |
Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia |
title_full |
Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia |
title_fullStr |
Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia |
title_full_unstemmed |
Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia |
title_sort |
interannual variation in the diet of the antarctic prion pachyptila desolata at south georgia |
publisher |
birdl;ife Australia |
publishDate |
1997 |
url |
http://nora.nerc.ac.uk/id/eprint/514685/ https://doi.org/10.1071/MU97016 |
long_lat |
ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
geographic |
Antarctic The Antarctic Bird Island |
geographic_facet |
Antarctic The Antarctic Bird Island |
genre |
Antarc* Antarctic Antarctic Krill Antarctic prion Bird Island Euphausia superba Pachyptila desolata Copepods |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic prion Bird Island Euphausia superba Pachyptila desolata Copepods |
op_relation |
Reid, Keith; Croxall, John P.; Edwards, Tracy M. 1997 Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia. EMU, 97 (2). 126-132. https://doi.org/10.1071/MU97016 <https://doi.org/10.1071/MU97016> |
op_doi |
https://doi.org/10.1071/MU97016 |
container_title |
Emu - Austral Ornithology |
container_volume |
97 |
container_issue |
2 |
container_start_page |
126 |
op_container_end_page |
132 |
_version_ |
1766251559832780800 |