Selective feeding on jellyfish organs by northern fulmars Fulmarus glacialis
Several marine animals prey extensively on jellyfish in spite of the low energy contents of this type of prey. Northern Fulmars Fulmarus glacialis observed in the Barents Sea feeding on medusae of lion’s mane jellies Cyanea capillata fed from the underside of the jellyfish, eagerly ingesting gonadal...
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Language: | English |
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Norsk Ornitologisk Forening
2020
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Online Access: | https://hdl.handle.net/1956/23856 https://doi.org/10.15845/on.v42i0.1493 |
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ftunivbergen:oai:bora.uib.no:1956/23856 2023-05-15T15:38:55+02:00 Selective feeding on jellyfish organs by northern fulmars Fulmarus glacialis Byrkjedal, Ingvar Langhelle, Gunnar 2020-01-10T11:59:56Z application/pdf https://hdl.handle.net/1956/23856 https://doi.org/10.15845/on.v42i0.1493 eng eng Norsk Ornitologisk Forening urn:issn:1892-9737 https://hdl.handle.net/1956/23856 https://doi.org/10.15845/on.v42i0.1493 cristin:1715257 Ornis Norvegica Peer reviewed Journal article 2020 ftunivbergen https://doi.org/10.15845/on.v42i0.1493 2023-03-14T17:44:16Z Several marine animals prey extensively on jellyfish in spite of the low energy contents of this type of prey. Northern Fulmars Fulmarus glacialis observed in the Barents Sea feeding on medusae of lion’s mane jellies Cyanea capillata fed from the underside of the jellyfish, eagerly ingesting gonadal tissue as well as oral arms and tentacles, while the gelatinous tissue of the umbrella apparently was neglected by the birds. Gonads, arms and tentacles have about five times higher energetic contents than the tissue of the bell, approaching that of some species of fish. Aggressive defence of their prey and a continued feeding on jellyfish in the presence of discarded fish offal indicated jellyfish to be more than a second choice food for Northern Fulmars. The observations clearly showed that the Fulmars did not primarily feed on organisms associated with jellyfish. Their abundance and slow swimming make jellyfish an easily available prey. Scyphozoan cnidarians may be more important to pelagic seabirds than generally thought. publishedVersion Article in Journal/Newspaper Barents Sea Fulmarus glacialis University of Bergen: Bergen Open Research Archive (BORA-UiB) Barents Sea Ornis Norvegica 42 15 18 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Several marine animals prey extensively on jellyfish in spite of the low energy contents of this type of prey. Northern Fulmars Fulmarus glacialis observed in the Barents Sea feeding on medusae of lion’s mane jellies Cyanea capillata fed from the underside of the jellyfish, eagerly ingesting gonadal tissue as well as oral arms and tentacles, while the gelatinous tissue of the umbrella apparently was neglected by the birds. Gonads, arms and tentacles have about five times higher energetic contents than the tissue of the bell, approaching that of some species of fish. Aggressive defence of their prey and a continued feeding on jellyfish in the presence of discarded fish offal indicated jellyfish to be more than a second choice food for Northern Fulmars. The observations clearly showed that the Fulmars did not primarily feed on organisms associated with jellyfish. Their abundance and slow swimming make jellyfish an easily available prey. Scyphozoan cnidarians may be more important to pelagic seabirds than generally thought. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Byrkjedal, Ingvar Langhelle, Gunnar |
spellingShingle |
Byrkjedal, Ingvar Langhelle, Gunnar Selective feeding on jellyfish organs by northern fulmars Fulmarus glacialis |
author_facet |
Byrkjedal, Ingvar Langhelle, Gunnar |
author_sort |
Byrkjedal, Ingvar |
title |
Selective feeding on jellyfish organs by northern fulmars Fulmarus glacialis |
title_short |
Selective feeding on jellyfish organs by northern fulmars Fulmarus glacialis |
title_full |
Selective feeding on jellyfish organs by northern fulmars Fulmarus glacialis |
title_fullStr |
Selective feeding on jellyfish organs by northern fulmars Fulmarus glacialis |
title_full_unstemmed |
Selective feeding on jellyfish organs by northern fulmars Fulmarus glacialis |
title_sort |
selective feeding on jellyfish organs by northern fulmars fulmarus glacialis |
publisher |
Norsk Ornitologisk Forening |
publishDate |
2020 |
url |
https://hdl.handle.net/1956/23856 https://doi.org/10.15845/on.v42i0.1493 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Fulmarus glacialis |
genre_facet |
Barents Sea Fulmarus glacialis |
op_source |
Ornis Norvegica |
op_relation |
urn:issn:1892-9737 https://hdl.handle.net/1956/23856 https://doi.org/10.15845/on.v42i0.1493 cristin:1715257 |
op_doi |
https://doi.org/10.15845/on.v42i0.1493 |
container_title |
Ornis Norvegica |
container_volume |
42 |
container_start_page |
15 |
op_container_end_page |
18 |
_version_ |
1766370329987383296 |