Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. III. Feeding ecology of the young
A simultaneous comparison of the foods of Common Murre, Uria aalge, and Thick-billed Murre, Uria lomvia, chicks at the same location showed that the species composition of fish fed to chicks of the two murre species differed significantly. In both years of the study, Common Murre chicks were fed pre...
Published in: | Canadian Journal of Zoology |
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Canadian Science Publishing
1987
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Online Access: | http://dx.doi.org/10.1139/z87-253 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-253 |
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crcansciencepubl:10.1139/z87-253 2024-06-23T07:52:11+00:00 Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. III. Feeding ecology of the young Birkhead, T. R. Nettleship, D. N. 1987 http://dx.doi.org/10.1139/z87-253 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-253 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 65, issue 7, page 1638-1649 ISSN 0008-4301 1480-3283 journal-article 1987 crcansciencepubl https://doi.org/10.1139/z87-253 2024-06-13T04:10:52Z A simultaneous comparison of the foods of Common Murre, Uria aalge, and Thick-billed Murre, Uria lomvia, chicks at the same location showed that the species composition of fish fed to chicks of the two murre species differed significantly. In both years of the study, Common Murre chicks were fed predominantly capelin, Mallotus villosus (78–80% by weight), whereas Thick-billed Murre chicks were fed mainly daubed shanny, Lumpenus maculatus (61–70% by weight). Thick-billed Murres tended to feed their chicks more frequently than Common Murres, probably because in both years the mean caloric value of their prey was lower than that of the Common Murre's. No other statistically significant interspecific differences were consistent between years. Prey lengths and weights overlapped considerably between the murre species, and the caloric intake of chicks showed no consistent interspecific difference. Marked interyear differences in feeding rate, prey size, and caloric intake occurred in both species. In 1982 ice breakup was late, and the murres' breeding seasons were delayed; this appeared to result in poor synchronization between the temporal pattern of food availability and the timing of each species' chick-rearing period, and the caloric intakes of chicks of both species were lower in that year than in 1983. Article in Journal/Newspaper Common Murre Daubed shanny thick-billed murre Uria aalge Uria lomvia uria Canadian Science Publishing Gannet Islands ENVELOPE(-56.536,-56.536,53.941,53.941) Canadian Journal of Zoology 65 7 1638 1649 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
A simultaneous comparison of the foods of Common Murre, Uria aalge, and Thick-billed Murre, Uria lomvia, chicks at the same location showed that the species composition of fish fed to chicks of the two murre species differed significantly. In both years of the study, Common Murre chicks were fed predominantly capelin, Mallotus villosus (78–80% by weight), whereas Thick-billed Murre chicks were fed mainly daubed shanny, Lumpenus maculatus (61–70% by weight). Thick-billed Murres tended to feed their chicks more frequently than Common Murres, probably because in both years the mean caloric value of their prey was lower than that of the Common Murre's. No other statistically significant interspecific differences were consistent between years. Prey lengths and weights overlapped considerably between the murre species, and the caloric intake of chicks showed no consistent interspecific difference. Marked interyear differences in feeding rate, prey size, and caloric intake occurred in both species. In 1982 ice breakup was late, and the murres' breeding seasons were delayed; this appeared to result in poor synchronization between the temporal pattern of food availability and the timing of each species' chick-rearing period, and the caloric intakes of chicks of both species were lower in that year than in 1983. |
format |
Article in Journal/Newspaper |
author |
Birkhead, T. R. Nettleship, D. N. |
spellingShingle |
Birkhead, T. R. Nettleship, D. N. Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. III. Feeding ecology of the young |
author_facet |
Birkhead, T. R. Nettleship, D. N. |
author_sort |
Birkhead, T. R. |
title |
Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. III. Feeding ecology of the young |
title_short |
Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. III. Feeding ecology of the young |
title_full |
Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. III. Feeding ecology of the young |
title_fullStr |
Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. III. Feeding ecology of the young |
title_full_unstemmed |
Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. III. Feeding ecology of the young |
title_sort |
ecological relationships between common murres, uria aalge, and thick-billed murres, uria lomvia, at the gannet islands, labrador. iii. feeding ecology of the young |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/z87-253 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-253 |
long_lat |
ENVELOPE(-56.536,-56.536,53.941,53.941) |
geographic |
Gannet Islands |
geographic_facet |
Gannet Islands |
genre |
Common Murre Daubed shanny thick-billed murre Uria aalge Uria lomvia uria |
genre_facet |
Common Murre Daubed shanny thick-billed murre Uria aalge Uria lomvia uria |
op_source |
Canadian Journal of Zoology volume 65, issue 7, page 1638-1649 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z87-253 |
container_title |
Canadian Journal of Zoology |
container_volume |
65 |
container_issue |
7 |
container_start_page |
1638 |
op_container_end_page |
1649 |
_version_ |
1802643430341345280 |