Time Budgets of Common Murres Vary in Relation to Changes in Inshore Capelin Availability
Changes in capelin (Mallotus villosus) biology since the 1990s have directly or indirectly induced variable breeding conditions for many seabirds in the Northwest Atlantic. Time budgets of the same individual Common Murres (Uria aalge) were examined in relation to annual variations in the arrival of...
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American Ornithological Society
2008
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ftbioone:10.1525/cond.2008.8440 2024-05-12T08:07:17+00:00 Time Budgets of Common Murres Vary in Relation to Changes in Inshore Capelin Availability Sabina I. Wilhelm Carolyn J. Walsh Anne E. Storey Sabina I. Wilhelm Carolyn J. Walsh Anne E. Storey world 2008-05-01 text/HTML https://doi.org/10.1525/cond.2008.8440 en eng American Ornithological Society doi:10.1525/cond.2008.8440 All rights reserved. https://doi.org/10.1525/cond.2008.8440 Text 2008 ftbioone https://doi.org/10.1525/cond.2008.8440 2024-04-16T02:14:21Z Changes in capelin (Mallotus villosus) biology since the 1990s have directly or indirectly induced variable breeding conditions for many seabirds in the Northwest Atlantic. Time budgets of the same individual Common Murres (Uria aalge) were examined in relation to annual variations in the arrival of inshore spawning capelin during three consecutive chick-rearing periods (1998–2000) on Great Island in the Witless Bay Ecological Reserve, Newfoundland, Canada. Despite high foraging effort (longer provisioning trips, lower co-attendance time, and faster colony departure after a brooding bout), chick-feeding rates were low during early chick rearing in 2000 due to a mismatch between early egg hatching and the later inshore arrival of spawning capelin. Time budgets of murres breeding on Great Island were examined in relation to those of murres in other nearby colonies and to long-term changes in capelin spawning behavior across decades (1982–1985 versus 1998–2000). Recent overall provisioning rates on Great Island were comparable to those of other nearby colonies during the same time period (with the exception of Funk Island) and to those reported during the 1980s. However, murres breeding in recent years in the reserve exhibited higher foraging effort, which is likely linked to recent changes in the availability of capelin as a result of later spawning, changes in capelin distribution, and their overall smaller size. Murres currently may be constrained to timing their egg laying such that hatching coincides with the arrival of inshore capelin rather than peak capelin abundance and, thus, are vulnerable to sudden changes in the ecosystem. Text Newfoundland Northwest Atlantic Uria aalge uria BioOne Online Journals Canada Funk Island ENVELOPE(-53.181,-53.181,49.750,49.750) The Condor 110 2 316 324 |
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Open Polar |
collection |
BioOne Online Journals |
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ftbioone |
language |
English |
description |
Changes in capelin (Mallotus villosus) biology since the 1990s have directly or indirectly induced variable breeding conditions for many seabirds in the Northwest Atlantic. Time budgets of the same individual Common Murres (Uria aalge) were examined in relation to annual variations in the arrival of inshore spawning capelin during three consecutive chick-rearing periods (1998–2000) on Great Island in the Witless Bay Ecological Reserve, Newfoundland, Canada. Despite high foraging effort (longer provisioning trips, lower co-attendance time, and faster colony departure after a brooding bout), chick-feeding rates were low during early chick rearing in 2000 due to a mismatch between early egg hatching and the later inshore arrival of spawning capelin. Time budgets of murres breeding on Great Island were examined in relation to those of murres in other nearby colonies and to long-term changes in capelin spawning behavior across decades (1982–1985 versus 1998–2000). Recent overall provisioning rates on Great Island were comparable to those of other nearby colonies during the same time period (with the exception of Funk Island) and to those reported during the 1980s. However, murres breeding in recent years in the reserve exhibited higher foraging effort, which is likely linked to recent changes in the availability of capelin as a result of later spawning, changes in capelin distribution, and their overall smaller size. Murres currently may be constrained to timing their egg laying such that hatching coincides with the arrival of inshore capelin rather than peak capelin abundance and, thus, are vulnerable to sudden changes in the ecosystem. |
author2 |
Sabina I. Wilhelm Carolyn J. Walsh Anne E. Storey |
format |
Text |
author |
Sabina I. Wilhelm Carolyn J. Walsh Anne E. Storey |
spellingShingle |
Sabina I. Wilhelm Carolyn J. Walsh Anne E. Storey Time Budgets of Common Murres Vary in Relation to Changes in Inshore Capelin Availability |
author_facet |
Sabina I. Wilhelm Carolyn J. Walsh Anne E. Storey |
author_sort |
Sabina I. Wilhelm |
title |
Time Budgets of Common Murres Vary in Relation to Changes in Inshore Capelin Availability |
title_short |
Time Budgets of Common Murres Vary in Relation to Changes in Inshore Capelin Availability |
title_full |
Time Budgets of Common Murres Vary in Relation to Changes in Inshore Capelin Availability |
title_fullStr |
Time Budgets of Common Murres Vary in Relation to Changes in Inshore Capelin Availability |
title_full_unstemmed |
Time Budgets of Common Murres Vary in Relation to Changes in Inshore Capelin Availability |
title_sort |
time budgets of common murres vary in relation to changes in inshore capelin availability |
publisher |
American Ornithological Society |
publishDate |
2008 |
url |
https://doi.org/10.1525/cond.2008.8440 |
op_coverage |
world |
long_lat |
ENVELOPE(-53.181,-53.181,49.750,49.750) |
geographic |
Canada Funk Island |
geographic_facet |
Canada Funk Island |
genre |
Newfoundland Northwest Atlantic Uria aalge uria |
genre_facet |
Newfoundland Northwest Atlantic Uria aalge uria |
op_source |
https://doi.org/10.1525/cond.2008.8440 |
op_relation |
doi:10.1525/cond.2008.8440 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1525/cond.2008.8440 |
container_title |
The Condor |
container_volume |
110 |
container_issue |
2 |
container_start_page |
316 |
op_container_end_page |
324 |
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1798849890445426688 |