Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus)
Northern gannets (Sula bassana) are considered to obtain prey usually by rapid, vertical, shallow plunge dives. In order to test this contention and investigate underwater foraging behaviour, we attached two types of data–logging systems to 11 parental northern gannets at Funk Island in the North–We...
Published in: | Proceedings of the Royal Society of London. Series B: Biological Sciences |
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Language: | English |
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Royal Society of London
2000
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Online Access: | https://oceanrep.geomar.de/id/eprint/1713/ https://oceanrep.geomar.de/id/eprint/1713/1/12233767.pdf https://doi.org/10.1098/rspb.2000.1200 |
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ftoceanrep:oai:oceanrep.geomar.de:1713 2023-05-15T17:40:22+02:00 Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus) Garthe, Stefan Benvenuti, S. Montevecchi, W.A. 2000 text https://oceanrep.geomar.de/id/eprint/1713/ https://oceanrep.geomar.de/id/eprint/1713/1/12233767.pdf https://doi.org/10.1098/rspb.2000.1200 en eng Royal Society of London https://oceanrep.geomar.de/id/eprint/1713/1/12233767.pdf Garthe, S., Benvenuti, S. and Montevecchi, W. A. (2000) Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus). Proceedings of the Royal Society of London, Series B : Biological Sciences, 267 . pp. 1717-1722. DOI 10.1098/rspb.2000.1200 <https://doi.org/10.1098/rspb.2000.1200>. doi:10.1098/rspb.2000.1200 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2000 ftoceanrep https://doi.org/10.1098/rspb.2000.1200 2023-04-07T14:44:29Z Northern gannets (Sula bassana) are considered to obtain prey usually by rapid, vertical, shallow plunge dives. In order to test this contention and investigate underwater foraging behaviour, we attached two types of data–logging systems to 11 parental northern gannets at Funk Island in the North–West Atlantic. We documented, for the first time to the authors' knowledge, gannets performing long, flat–bottomed, Ushaped dives that involved underwater wing propulsion as well as rapid, shallow, V–shaped dives. The median and maximum dive depths and durations were 4.6 and 22.0m and 8 and 38s, respectively. Short, shallow dives were usually V–shaped and dives deeper than 8m and longer than 10s were usually Ushaped, including a period at constant depth (varying between 4 and 28s with median 8s). Diving occurred throughout the daylight period and deepest dives were performed during late morning. On the basis of motion sensors in the loggers and food collections from telemetered birds, we concluded that extended, deep dives were directed at deep schools of capelin, a small pelagic fish, and we hypothesized that V–shaped dives were aimed at larger, pelagic fishes and squids. Furthermore, these V–shaped dives allowed the birds to surprise their pelagic prey and this may be critical because the maximum swimming speeds of the prey species may exceed the maximum dive speeds of the birds. Article in Journal/Newspaper North West Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Funk Island ENVELOPE(-53.181,-53.181,49.750,49.750) Proceedings of the Royal Society of London. Series B: Biological Sciences 267 1454 1717 1722 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Northern gannets (Sula bassana) are considered to obtain prey usually by rapid, vertical, shallow plunge dives. In order to test this contention and investigate underwater foraging behaviour, we attached two types of data–logging systems to 11 parental northern gannets at Funk Island in the North–West Atlantic. We documented, for the first time to the authors' knowledge, gannets performing long, flat–bottomed, Ushaped dives that involved underwater wing propulsion as well as rapid, shallow, V–shaped dives. The median and maximum dive depths and durations were 4.6 and 22.0m and 8 and 38s, respectively. Short, shallow dives were usually V–shaped and dives deeper than 8m and longer than 10s were usually Ushaped, including a period at constant depth (varying between 4 and 28s with median 8s). Diving occurred throughout the daylight period and deepest dives were performed during late morning. On the basis of motion sensors in the loggers and food collections from telemetered birds, we concluded that extended, deep dives were directed at deep schools of capelin, a small pelagic fish, and we hypothesized that V–shaped dives were aimed at larger, pelagic fishes and squids. Furthermore, these V–shaped dives allowed the birds to surprise their pelagic prey and this may be critical because the maximum swimming speeds of the prey species may exceed the maximum dive speeds of the birds. |
format |
Article in Journal/Newspaper |
author |
Garthe, Stefan Benvenuti, S. Montevecchi, W.A. |
spellingShingle |
Garthe, Stefan Benvenuti, S. Montevecchi, W.A. Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus) |
author_facet |
Garthe, Stefan Benvenuti, S. Montevecchi, W.A. |
author_sort |
Garthe, Stefan |
title |
Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus) |
title_short |
Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus) |
title_full |
Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus) |
title_fullStr |
Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus) |
title_full_unstemmed |
Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus) |
title_sort |
pursuit-plunging by northern gannets (sula bassana) feeding on capelin (mallotus villosus) |
publisher |
Royal Society of London |
publishDate |
2000 |
url |
https://oceanrep.geomar.de/id/eprint/1713/ https://oceanrep.geomar.de/id/eprint/1713/1/12233767.pdf https://doi.org/10.1098/rspb.2000.1200 |
long_lat |
ENVELOPE(-53.181,-53.181,49.750,49.750) |
geographic |
Funk Island |
geographic_facet |
Funk Island |
genre |
North West Atlantic |
genre_facet |
North West Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/1713/1/12233767.pdf Garthe, S., Benvenuti, S. and Montevecchi, W. A. (2000) Pursuit-plunging by Northern Gannets (Sula bassana) feeding on Capelin (Mallotus villosus). Proceedings of the Royal Society of London, Series B : Biological Sciences, 267 . pp. 1717-1722. DOI 10.1098/rspb.2000.1200 <https://doi.org/10.1098/rspb.2000.1200>. doi:10.1098/rspb.2000.1200 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1098/rspb.2000.1200 |
container_title |
Proceedings of the Royal Society of London. Series B: Biological Sciences |
container_volume |
267 |
container_issue |
1454 |
container_start_page |
1717 |
op_container_end_page |
1722 |
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1766141280821182464 |