Chick feeding in the diving petrels Pelecanoides georgicus and P. urinatrix exsul
Chick feeding in common diving petrels ( Pelecanoides urinatrix exsul ) and South Georgia diving petrels ( P. georgicus ) was studied on Bird Island, South Georgia. Complete chick meals removed from the proventriculus of adults averaged 25.5 g (n = 32) for common diving petrels (17.6% of adult mass)...
Published in: | Antarctic Science |
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Language: | English |
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Cambridge University Press (CUP)
1989
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Online Access: | http://dx.doi.org/10.1017/s0954102089000507 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102089000507 |
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crcambridgeupr:10.1017/s0954102089000507 2024-03-03T08:39:29+00:00 Chick feeding in the diving petrels Pelecanoides georgicus and P. urinatrix exsul Roby, Daniel D. 1989 http://dx.doi.org/10.1017/s0954102089000507 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102089000507 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 1, issue 4, page 337-342 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1989 crcambridgeupr https://doi.org/10.1017/s0954102089000507 2024-02-08T08:41:47Z Chick feeding in common diving petrels ( Pelecanoides urinatrix exsul ) and South Georgia diving petrels ( P. georgicus ) was studied on Bird Island, South Georgia. Complete chick meals removed from the proventriculus of adults averaged 25.5 g (n = 32) for common diving petrels (17.6% of adult mass) and 23.3 g (n = 24) for South Georgia diving petrels (20.2% of adult mass); neither contained stomach oils. The sum of the positive mass increments during overnight weighings (SUM) averaged 48.6 g for common diving petrel chicks (n = 78 chick nights) and 41.6 g for South Georgia diving petrel chicks (n = 78 chick nights). Average adult feeding frequencies were 0.95 meals day −1 and 0.92 meals day −1 , respectively. Relative meal size in diving petrels was similar to that of other procellariiforms, but SUM averaged about twice that of other petrels. The lower conversion efficiency of meals to body mass in diving petrel chicks reflects the absence of stomach oils in the diet. Higher chick feeding frequency and lower variance in SUM are consistent with the hypothesis that diving petrels forage nearshore on reliable food supply compared with other procellariiforms. Article in Journal/Newspaper Antarctic Science Bird Island Cambridge University Press Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) Antarctic Science 1 4 337 342 |
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 Roby, Daniel D. Chick feeding in the diving petrels Pelecanoides georgicus and P. urinatrix exsul |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Chick feeding in common diving petrels ( Pelecanoides urinatrix exsul ) and South Georgia diving petrels ( P. georgicus ) was studied on Bird Island, South Georgia. Complete chick meals removed from the proventriculus of adults averaged 25.5 g (n = 32) for common diving petrels (17.6% of adult mass) and 23.3 g (n = 24) for South Georgia diving petrels (20.2% of adult mass); neither contained stomach oils. The sum of the positive mass increments during overnight weighings (SUM) averaged 48.6 g for common diving petrel chicks (n = 78 chick nights) and 41.6 g for South Georgia diving petrel chicks (n = 78 chick nights). Average adult feeding frequencies were 0.95 meals day −1 and 0.92 meals day −1 , respectively. Relative meal size in diving petrels was similar to that of other procellariiforms, but SUM averaged about twice that of other petrels. The lower conversion efficiency of meals to body mass in diving petrel chicks reflects the absence of stomach oils in the diet. Higher chick feeding frequency and lower variance in SUM are consistent with the hypothesis that diving petrels forage nearshore on reliable food supply compared with other procellariiforms. |
format |
Article in Journal/Newspaper |
author |
Roby, Daniel D. |
author_facet |
Roby, Daniel D. |
author_sort |
Roby, Daniel D. |
title |
Chick feeding in the diving petrels Pelecanoides georgicus and P. urinatrix exsul |
title_short |
Chick feeding in the diving petrels Pelecanoides georgicus and P. urinatrix exsul |
title_full |
Chick feeding in the diving petrels Pelecanoides georgicus and P. urinatrix exsul |
title_fullStr |
Chick feeding in the diving petrels Pelecanoides georgicus and P. urinatrix exsul |
title_full_unstemmed |
Chick feeding in the diving petrels Pelecanoides georgicus and P. urinatrix exsul |
title_sort |
chick feeding in the diving petrels pelecanoides georgicus and p. urinatrix exsul |
publisher |
Cambridge University Press (CUP) |
publishDate |
1989 |
url |
http://dx.doi.org/10.1017/s0954102089000507 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102089000507 |
long_lat |
ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
geographic |
Bird Island |
geographic_facet |
Bird Island |
genre |
Antarctic Science Bird Island |
genre_facet |
Antarctic Science Bird Island |
op_source |
Antarctic Science volume 1, issue 4, page 337-342 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102089000507 |
container_title |
Antarctic Science |
container_volume |
1 |
container_issue |
4 |
container_start_page |
337 |
op_container_end_page |
342 |
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1792495047036370944 |