Reproductive Performance of Seabirds: The Importance of Population and Colony Size
Compared reproductive performance of 5 species of seabirds at St. George Island (2.5 million birds) and St. Paul Island (250 000 birds), in the SE Bering Sea. All species had lower chick growth rates at the larger colony; differences were statistically significant in 4 species. Fledge weights of com...
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1986
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ftcdlib:oai:escholarship.org:ark:/13030/qt2363j0gf 2023-06-11T04:10:39+02:00 Reproductive Performance of Seabirds: The Importance of Population and Colony Size Hunt, George L Eppley, Zoe A Schneider, David C 306 - 317 1986-04-01 application/pdf https://escholarship.org/uc/item/2363j0gf unknown eScholarship, University of California qt2363j0gf https://escholarship.org/uc/item/2363j0gf CC-BY Ornithology, vol 103, iss 2 Zoology Ornithology article 1986 ftcdlib 2023-05-29T17:59:05Z Compared reproductive performance of 5 species of seabirds at St. George Island (2.5 million birds) and St. Paul Island (250 000 birds), in the SE Bering Sea. All species had lower chick growth rates at the larger colony; differences were statistically significant in 4 species. Fledge weights of common murres Uria aalge on St. George Island were 84-88% of those on St. Paul. Average fledge weights of thick-billed murres U. lomvia on St. George were only 74% of those for chicks from St. Paul. No significant differences were found in clutch size or breeding success between populations breeding at the 2 colonies. For black-legged kittiwakes Rissa tridactyla common murres, and thick-billed murres, analysis was extended to include published data from other colonies. There were consistently negative relationships between population size and several measures of breeding performance (clutch size, growth rate, fledge weight, and breeding success). In addition to the lower breeding success at colonies that support large populations, chicks from these colonies may be subject to higher postfledging mortality because of fledging at lower weights.-from Authors Article in Journal/Newspaper Bering Sea rissa tridactyla Uria aalge uria University of California: eScholarship Bering Sea |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Zoology Ornithology |
spellingShingle |
Zoology Ornithology Hunt, George L Eppley, Zoe A Schneider, David C Reproductive Performance of Seabirds: The Importance of Population and Colony Size |
topic_facet |
Zoology Ornithology |
description |
Compared reproductive performance of 5 species of seabirds at St. George Island (2.5 million birds) and St. Paul Island (250 000 birds), in the SE Bering Sea. All species had lower chick growth rates at the larger colony; differences were statistically significant in 4 species. Fledge weights of common murres Uria aalge on St. George Island were 84-88% of those on St. Paul. Average fledge weights of thick-billed murres U. lomvia on St. George were only 74% of those for chicks from St. Paul. No significant differences were found in clutch size or breeding success between populations breeding at the 2 colonies. For black-legged kittiwakes Rissa tridactyla common murres, and thick-billed murres, analysis was extended to include published data from other colonies. There were consistently negative relationships between population size and several measures of breeding performance (clutch size, growth rate, fledge weight, and breeding success). In addition to the lower breeding success at colonies that support large populations, chicks from these colonies may be subject to higher postfledging mortality because of fledging at lower weights.-from Authors |
format |
Article in Journal/Newspaper |
author |
Hunt, George L Eppley, Zoe A Schneider, David C |
author_facet |
Hunt, George L Eppley, Zoe A Schneider, David C |
author_sort |
Hunt, George L |
title |
Reproductive Performance of Seabirds: The Importance of Population and Colony Size |
title_short |
Reproductive Performance of Seabirds: The Importance of Population and Colony Size |
title_full |
Reproductive Performance of Seabirds: The Importance of Population and Colony Size |
title_fullStr |
Reproductive Performance of Seabirds: The Importance of Population and Colony Size |
title_full_unstemmed |
Reproductive Performance of Seabirds: The Importance of Population and Colony Size |
title_sort |
reproductive performance of seabirds: the importance of population and colony size |
publisher |
eScholarship, University of California |
publishDate |
1986 |
url |
https://escholarship.org/uc/item/2363j0gf |
op_coverage |
306 - 317 |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea rissa tridactyla Uria aalge uria |
genre_facet |
Bering Sea rissa tridactyla Uria aalge uria |
op_source |
Ornithology, vol 103, iss 2 |
op_relation |
qt2363j0gf https://escholarship.org/uc/item/2363j0gf |
op_rights |
CC-BY |
_version_ |
1768385202594250752 |