The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia
The diet of breeding white-chinned petrels was studied during the summers of 1996 and 1998 at South Georgia. Krill abundance/availability was high throughout 1996 but apparently low at the beginning of the 1998 breeding season. The diet of white-chinned petrels was similar between years and consiste...
Published in: | Antarctic Science |
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Language: | English |
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Cambridge University Press
1999
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Online Access: | http://nora.nerc.ac.uk/id/eprint/503019/ https://nora.nerc.ac.uk/id/eprint/503019/1/download.pdf https://doi.org/10.1017/S0954102099000371 |
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ftnerc:oai:nora.nerc.ac.uk:503019 2023-05-15T14:14:51+02:00 The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia Berrow, Simon D. Croxall, John P. 1999 text http://nora.nerc.ac.uk/id/eprint/503019/ https://nora.nerc.ac.uk/id/eprint/503019/1/download.pdf https://doi.org/10.1017/S0954102099000371 en eng Cambridge University Press https://nora.nerc.ac.uk/id/eprint/503019/1/download.pdf Berrow, Simon D.; Croxall, John P. 1999 The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia. Antarctic Science, 11 (03). 283-292. https://doi.org/10.1017/S0954102099000371 <https://doi.org/10.1017/S0954102099000371> Publication - Article PeerReviewed 1999 ftnerc https://doi.org/10.1017/S0954102099000371 2023-02-04T19:37:38Z The diet of breeding white-chinned petrels was studied during the summers of 1996 and 1998 at South Georgia. Krill abundance/availability was high throughout 1996 but apparently low at the beginning of the 1998 breeding season. The diet of white-chinned petrels was similar between years and consistent with previous studies. Krill Euphausia superba (41–42% by weight) was the single most important prey item followed by fish (39–29%) and squid (19–25%). Meal mass was consistent (110 g in 1996, 119 g in 1998) between years but a significant decrease (46%) in feeding frequency in 1998 (0.54 meals day−1 compared to 0.75 meals day−1 in 1996) resulted in 19% less food delivered to chicks in 1998 than in 1996. Breeding success, however, was consistent between years at 44% and similar to that recorded previously at Bird Island. This is in contrast to black-browed and grey-headed albatrosses, both of which experienced almost total breeding failure in 1998. It is suggested that their varied and versatile feeding methods, together with their greater diving ability, capacity to feed at night and extensive foraging range, help white-chinned petrels minimise the effects of krill shortage. Article in Journal/Newspaper Antarctic Science Bird Island Euphausia superba Natural Environment Research Council: NERC Open Research Archive Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) Antarctic Science 11 3 283 292 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The diet of breeding white-chinned petrels was studied during the summers of 1996 and 1998 at South Georgia. Krill abundance/availability was high throughout 1996 but apparently low at the beginning of the 1998 breeding season. The diet of white-chinned petrels was similar between years and consistent with previous studies. Krill Euphausia superba (41–42% by weight) was the single most important prey item followed by fish (39–29%) and squid (19–25%). Meal mass was consistent (110 g in 1996, 119 g in 1998) between years but a significant decrease (46%) in feeding frequency in 1998 (0.54 meals day−1 compared to 0.75 meals day−1 in 1996) resulted in 19% less food delivered to chicks in 1998 than in 1996. Breeding success, however, was consistent between years at 44% and similar to that recorded previously at Bird Island. This is in contrast to black-browed and grey-headed albatrosses, both of which experienced almost total breeding failure in 1998. It is suggested that their varied and versatile feeding methods, together with their greater diving ability, capacity to feed at night and extensive foraging range, help white-chinned petrels minimise the effects of krill shortage. |
format |
Article in Journal/Newspaper |
author |
Berrow, Simon D. Croxall, John P. |
spellingShingle |
Berrow, Simon D. Croxall, John P. The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia |
author_facet |
Berrow, Simon D. Croxall, John P. |
author_sort |
Berrow, Simon D. |
title |
The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia |
title_short |
The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia |
title_full |
The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia |
title_fullStr |
The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia |
title_full_unstemmed |
The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia |
title_sort |
diet of white-chinned petrels procellaria aequinoctialis, linnaeus 1758, in years of contrasting prey availability at south georgia |
publisher |
Cambridge University Press |
publishDate |
1999 |
url |
http://nora.nerc.ac.uk/id/eprint/503019/ https://nora.nerc.ac.uk/id/eprint/503019/1/download.pdf https://doi.org/10.1017/S0954102099000371 |
long_lat |
ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
geographic |
Bird Island |
geographic_facet |
Bird Island |
genre |
Antarctic Science Bird Island Euphausia superba |
genre_facet |
Antarctic Science Bird Island Euphausia superba |
op_relation |
https://nora.nerc.ac.uk/id/eprint/503019/1/download.pdf Berrow, Simon D.; Croxall, John P. 1999 The diet of white-chinned petrels Procellaria aequinoctialis, Linnaeus 1758, in years of contrasting prey availability at South Georgia. Antarctic Science, 11 (03). 283-292. https://doi.org/10.1017/S0954102099000371 <https://doi.org/10.1017/S0954102099000371> |
op_doi |
https://doi.org/10.1017/S0954102099000371 |
container_title |
Antarctic Science |
container_volume |
11 |
container_issue |
3 |
container_start_page |
283 |
op_container_end_page |
292 |
_version_ |
1766287231173001216 |