Regulation of food provisioning in the Antarctic petrel; the importance of parental body condition and chick body mass
1. Two hypotheses may explain how long‐lived seabirds regulate the food provisioning to their chick. The fixed level of investment hypothesis states that the parents provide food for their chick according to an intrinsic rhythm, independent of their chick's need. The flexible investment hypothe...
Published in: | Journal of Animal Ecology |
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Online Access: | http://dx.doi.org/10.1046/j.1365-2656.1998.00234.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2656.1998.00234.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2656.1998.00234.x https://onlinelibrary.wiley.com/doi/full-xml/10.1046/j.1365-2656.1998.00234.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2656.1998.00234.x |
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crwiley:10.1046/j.1365-2656.1998.00234.x 2024-09-15T17:45:39+00:00 Regulation of food provisioning in the Antarctic petrel; the importance of parental body condition and chick body mass Tveraa, Torkild Sether, Bernt‐Erik Aanes, Ronny Erikstad, Kjell Einar 1998 http://dx.doi.org/10.1046/j.1365-2656.1998.00234.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2656.1998.00234.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2656.1998.00234.x https://onlinelibrary.wiley.com/doi/full-xml/10.1046/j.1365-2656.1998.00234.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2656.1998.00234.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Animal Ecology volume 67, issue 5, page 699-704 ISSN 0021-8790 1365-2656 journal-article 1998 crwiley https://doi.org/10.1046/j.1365-2656.1998.00234.x 2024-08-27T04:32:43Z 1. Two hypotheses may explain how long‐lived seabirds regulate the food provisioning to their chick. The fixed level of investment hypothesis states that the parents provide food for their chick according to an intrinsic rhythm, independent of their chick's need. The flexible investment hypothesis states that the parents adjust their food provisioning both according to their chick's and their own need. 2. We tested how the Antarctic petrels adjust the food‐provisioning according to their own body condition or to their chick's need. First, we selected parents in poor and good body condition. Then we gave all parents randomly a chick of different body mass, but of the same age. We then measured the chicks daily until they were fed for the first time after swapping. 3. Parents in good body condition at hatching were more likely to produce a chick that was still alive 9 days after hatching than parents in poor body condition. Chick body mass at day 9 and at the end of the guarding period was positively related to the mean body condition of the parents at hatching. 4. The meal size provided by parents in good body condition was larger than that provided by parents in poor body condition. Parents in good body condition delivered more food to small than to large chicks, whereas no such relationship was found among parents in poor body condition. 5. Our results suggest that the Antarctic petrel parents adjust the amount of food delivered to their chick according to both the chick's need and their own body condition, and that the ability to respond to the chick's need is dependent upon their own body condition. Article in Journal/Newspaper Antarc* Antarctic Antarctic Petrel Wiley Online Library Journal of Animal Ecology 67 5 699 704 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
1. Two hypotheses may explain how long‐lived seabirds regulate the food provisioning to their chick. The fixed level of investment hypothesis states that the parents provide food for their chick according to an intrinsic rhythm, independent of their chick's need. The flexible investment hypothesis states that the parents adjust their food provisioning both according to their chick's and their own need. 2. We tested how the Antarctic petrels adjust the food‐provisioning according to their own body condition or to their chick's need. First, we selected parents in poor and good body condition. Then we gave all parents randomly a chick of different body mass, but of the same age. We then measured the chicks daily until they were fed for the first time after swapping. 3. Parents in good body condition at hatching were more likely to produce a chick that was still alive 9 days after hatching than parents in poor body condition. Chick body mass at day 9 and at the end of the guarding period was positively related to the mean body condition of the parents at hatching. 4. The meal size provided by parents in good body condition was larger than that provided by parents in poor body condition. Parents in good body condition delivered more food to small than to large chicks, whereas no such relationship was found among parents in poor body condition. 5. Our results suggest that the Antarctic petrel parents adjust the amount of food delivered to their chick according to both the chick's need and their own body condition, and that the ability to respond to the chick's need is dependent upon their own body condition. |
format |
Article in Journal/Newspaper |
author |
Tveraa, Torkild Sether, Bernt‐Erik Aanes, Ronny Erikstad, Kjell Einar |
spellingShingle |
Tveraa, Torkild Sether, Bernt‐Erik Aanes, Ronny Erikstad, Kjell Einar Regulation of food provisioning in the Antarctic petrel; the importance of parental body condition and chick body mass |
author_facet |
Tveraa, Torkild Sether, Bernt‐Erik Aanes, Ronny Erikstad, Kjell Einar |
author_sort |
Tveraa, Torkild |
title |
Regulation of food provisioning in the Antarctic petrel; the importance of parental body condition and chick body mass |
title_short |
Regulation of food provisioning in the Antarctic petrel; the importance of parental body condition and chick body mass |
title_full |
Regulation of food provisioning in the Antarctic petrel; the importance of parental body condition and chick body mass |
title_fullStr |
Regulation of food provisioning in the Antarctic petrel; the importance of parental body condition and chick body mass |
title_full_unstemmed |
Regulation of food provisioning in the Antarctic petrel; the importance of parental body condition and chick body mass |
title_sort |
regulation of food provisioning in the antarctic petrel; the importance of parental body condition and chick body mass |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.1046/j.1365-2656.1998.00234.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2656.1998.00234.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2656.1998.00234.x https://onlinelibrary.wiley.com/doi/full-xml/10.1046/j.1365-2656.1998.00234.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2656.1998.00234.x |
genre |
Antarc* Antarctic Antarctic Petrel |
genre_facet |
Antarc* Antarctic Antarctic Petrel |
op_source |
Journal of Animal Ecology volume 67, issue 5, page 699-704 ISSN 0021-8790 1365-2656 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2656.1998.00234.x |
container_title |
Journal of Animal Ecology |
container_volume |
67 |
container_issue |
5 |
container_start_page |
699 |
op_container_end_page |
704 |
_version_ |
1810493550420295680 |