Optimal foraging in chick-raising Common Guillemots (Uria aalge)
The Norwegian population of the Common Guillemot Uria aalge has declined by > 95% since the 1960s, and is classified as critically endangered in the Norwegian Red List. Much of the recent decline has been attributed to reduced food availability, but without extensive documentation of adult diet....
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Language: | English |
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Online Access: | https://hdl.handle.net/10037/3882 https://doi.org/10.1007/s10336-010-0578-9 |
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ftunivtroemsoe:oai:munin.uit.no:10037/3882 2023-05-15T15:56:00+02:00 Optimal foraging in chick-raising Common Guillemots (Uria aalge) Bugge, Julie Barrett, Robert T. Pedersen, Torstein 2011 https://hdl.handle.net/10037/3882 https://doi.org/10.1007/s10336-010-0578-9 eng eng Journal of Ornithology = Journal fur Ornithologie 152(2011) nr. 2 s. 253-259 FRIDAID 348444 doi:10.1007/s10336-010-0578-9 0021-8375 https://hdl.handle.net/10037/3882 URN:NBN:no-uit_munin_3604 openAccess VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489 Journal article Tidsskriftartikkel Peer reviewed 2011 ftunivtroemsoe https://doi.org/10.1007/s10336-010-0578-9 2021-06-25T17:53:13Z The Norwegian population of the Common Guillemot Uria aalge has declined by > 95% since the 1960s, and is classified as critically endangered in the Norwegian Red List. Much of the recent decline has been attributed to reduced food availability, but without extensive documentation of adult diet. Instead, chick diet has been considered a proxy of adult diet during the breeding season in many Norwegian studies. Central place foraging theory, especially for single-prey loaders, however, predicts that this may not be so and this study compares directly the diet of adult and chick Common Guillemots during the breeding season at a colony in NE Norway. Whereas chicks were fed mainly capelin (Mallotus villosus) and sandeels (Ammodytes sp.), most of the adult diet consisted of the two youngest year classes of Gadidae, probably cod (Gadus morhua) and haddock (Melanogrammus aeglefinus). A successful ecosystem management of seabirds is dependent on a full understanding of how prey quality, abundance and availability influence seabird populations and their viability such that knowing the true diet of adult Common Guillemots has important implications in the modelling and management of the Norwegian populations. Article in Journal/Newspaper common guillemot Gadus morhua Uria aalge uria University of Tromsø: Munin Open Research Archive Norway Journal of Ornithology 152 2 253 259 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489 Bugge, Julie Barrett, Robert T. Pedersen, Torstein Optimal foraging in chick-raising Common Guillemots (Uria aalge) |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489 |
description |
The Norwegian population of the Common Guillemot Uria aalge has declined by > 95% since the 1960s, and is classified as critically endangered in the Norwegian Red List. Much of the recent decline has been attributed to reduced food availability, but without extensive documentation of adult diet. Instead, chick diet has been considered a proxy of adult diet during the breeding season in many Norwegian studies. Central place foraging theory, especially for single-prey loaders, however, predicts that this may not be so and this study compares directly the diet of adult and chick Common Guillemots during the breeding season at a colony in NE Norway. Whereas chicks were fed mainly capelin (Mallotus villosus) and sandeels (Ammodytes sp.), most of the adult diet consisted of the two youngest year classes of Gadidae, probably cod (Gadus morhua) and haddock (Melanogrammus aeglefinus). A successful ecosystem management of seabirds is dependent on a full understanding of how prey quality, abundance and availability influence seabird populations and their viability such that knowing the true diet of adult Common Guillemots has important implications in the modelling and management of the Norwegian populations. |
format |
Article in Journal/Newspaper |
author |
Bugge, Julie Barrett, Robert T. Pedersen, Torstein |
author_facet |
Bugge, Julie Barrett, Robert T. Pedersen, Torstein |
author_sort |
Bugge, Julie |
title |
Optimal foraging in chick-raising Common Guillemots (Uria aalge) |
title_short |
Optimal foraging in chick-raising Common Guillemots (Uria aalge) |
title_full |
Optimal foraging in chick-raising Common Guillemots (Uria aalge) |
title_fullStr |
Optimal foraging in chick-raising Common Guillemots (Uria aalge) |
title_full_unstemmed |
Optimal foraging in chick-raising Common Guillemots (Uria aalge) |
title_sort |
optimal foraging in chick-raising common guillemots (uria aalge) |
publishDate |
2011 |
url |
https://hdl.handle.net/10037/3882 https://doi.org/10.1007/s10336-010-0578-9 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
common guillemot Gadus morhua Uria aalge uria |
genre_facet |
common guillemot Gadus morhua Uria aalge uria |
op_relation |
Journal of Ornithology = Journal fur Ornithologie 152(2011) nr. 2 s. 253-259 FRIDAID 348444 doi:10.1007/s10336-010-0578-9 0021-8375 https://hdl.handle.net/10037/3882 URN:NBN:no-uit_munin_3604 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1007/s10336-010-0578-9 |
container_title |
Journal of Ornithology |
container_volume |
152 |
container_issue |
2 |
container_start_page |
253 |
op_container_end_page |
259 |
_version_ |
1766391487818366976 |