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 (CUP)
1999
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Online Access: | http://dx.doi.org/10.1017/s0954102099000371 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102099000371 |
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crcambridgeupr:10.1017/s0954102099000371 2024-04-07T07:48:21+00:00 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 http://dx.doi.org/10.1017/s0954102099000371 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102099000371 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 11, issue 3, page 283-292 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1999 crcambridgeupr https://doi.org/10.1017/s0954102099000371 2024-03-08T00:34:15Z 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 Cambridge University Press Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) Antarctic Science 11 3 283 292 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography 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 |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
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. |
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 (CUP) |
publishDate |
1999 |
url |
http://dx.doi.org/10.1017/s0954102099000371 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/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_source |
Antarctic Science volume 11, issue 3, page 283-292 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
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 |
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1795662371904028672 |