Regulation of provisioning rate in the Thick-billed Murre ( Uria lomvia )
Many studies of marine birds report that parents regulate provisioning, thus meeting their offsprings’ nutritional requirements at minimum cost. Others report that food availability limits provisioning, mediated by parental body condition. One hypothesis that might explain these discrepancies holds...
Published in: | Canadian Journal of Zoology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2006
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/z06-066 http://www.nrcresearchpress.com/doi/pdf/10.1139/z06-066 |
id |
crcansciencepubl:10.1139/z06-066 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/z06-066 2023-12-17T10:51:04+01:00 Regulation of provisioning rate in the Thick-billed Murre ( Uria lomvia ) Hipfner, J.M. Gaston, A.J. Smith, B.D. 2006 http://dx.doi.org/10.1139/z06-066 http://www.nrcresearchpress.com/doi/pdf/10.1139/z06-066 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 84, issue 7, page 931-938 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2006 crcansciencepubl https://doi.org/10.1139/z06-066 2023-11-19T13:38:46Z Many studies of marine birds report that parents regulate provisioning, thus meeting their offsprings’ nutritional requirements at minimum cost. Others report that food availability limits provisioning, mediated by parental body condition. One hypothesis that might explain these discrepancies holds that seabirds are better able to regulate provisioning under more favourable feeding conditions. To test this, we studied provisioning behaviour in the Thick-billed Murre (Uria lomvia L., 1758) in three colony-years that, based on chick growth rates, spanned a wide range of feeding conditions. We considered that parents regulating provisioning would (i) deliver more food as their offspring aged, to meet their increasing requirements, (ii) space consecutive deliveries nonrandomly in time, and (iii) maintain additional mass to buffer against future deterioration in feeding conditions. As predicted, we found that (i) provisioning rates increased with chick age in all three colony-years, but more strongly when feeding conditions were better; (ii) consecutive deliveries were spaced nonrandomly in all three colony-years, again more strongly when feeding conditions were better; and (iii) adults were heavier at mid chick-rearing when feeding conditions were better. Future studies that investigate how feeding conditions influence seabird provisioning could improve our understanding of how long-lived species optimize reproductive effort in variable environments. Article in Journal/Newspaper thick-billed murre Uria lomvia uria Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 84 7 931 938 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Hipfner, J.M. Gaston, A.J. Smith, B.D. Regulation of provisioning rate in the Thick-billed Murre ( Uria lomvia ) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Many studies of marine birds report that parents regulate provisioning, thus meeting their offsprings’ nutritional requirements at minimum cost. Others report that food availability limits provisioning, mediated by parental body condition. One hypothesis that might explain these discrepancies holds that seabirds are better able to regulate provisioning under more favourable feeding conditions. To test this, we studied provisioning behaviour in the Thick-billed Murre (Uria lomvia L., 1758) in three colony-years that, based on chick growth rates, spanned a wide range of feeding conditions. We considered that parents regulating provisioning would (i) deliver more food as their offspring aged, to meet their increasing requirements, (ii) space consecutive deliveries nonrandomly in time, and (iii) maintain additional mass to buffer against future deterioration in feeding conditions. As predicted, we found that (i) provisioning rates increased with chick age in all three colony-years, but more strongly when feeding conditions were better; (ii) consecutive deliveries were spaced nonrandomly in all three colony-years, again more strongly when feeding conditions were better; and (iii) adults were heavier at mid chick-rearing when feeding conditions were better. Future studies that investigate how feeding conditions influence seabird provisioning could improve our understanding of how long-lived species optimize reproductive effort in variable environments. |
format |
Article in Journal/Newspaper |
author |
Hipfner, J.M. Gaston, A.J. Smith, B.D. |
author_facet |
Hipfner, J.M. Gaston, A.J. Smith, B.D. |
author_sort |
Hipfner, J.M. |
title |
Regulation of provisioning rate in the Thick-billed Murre ( Uria lomvia ) |
title_short |
Regulation of provisioning rate in the Thick-billed Murre ( Uria lomvia ) |
title_full |
Regulation of provisioning rate in the Thick-billed Murre ( Uria lomvia ) |
title_fullStr |
Regulation of provisioning rate in the Thick-billed Murre ( Uria lomvia ) |
title_full_unstemmed |
Regulation of provisioning rate in the Thick-billed Murre ( Uria lomvia ) |
title_sort |
regulation of provisioning rate in the thick-billed murre ( uria lomvia ) |
publisher |
Canadian Science Publishing |
publishDate |
2006 |
url |
http://dx.doi.org/10.1139/z06-066 http://www.nrcresearchpress.com/doi/pdf/10.1139/z06-066 |
genre |
thick-billed murre Uria lomvia uria |
genre_facet |
thick-billed murre Uria lomvia uria |
op_source |
Canadian Journal of Zoology volume 84, issue 7, page 931-938 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z06-066 |
container_title |
Canadian Journal of Zoology |
container_volume |
84 |
container_issue |
7 |
container_start_page |
931 |
op_container_end_page |
938 |
_version_ |
1785576229245550592 |