Food‐habitat relationship of harbour seals and black cormorants in Skagerrak and Kattegat

Comparative studies on the food of the black cormorant Phalacrocorax carbo and the harbour seal Phoca vitulina were carried out in two contrasting habitat types. Both species feed predominantly on bottom‐dwelling fish. Black cormorants are able to utilize fish found both on vegetation‐covered and na...

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Published in:Journal of Zoology
Main Author: Härkönen, Tero J.
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 1988
Subjects:
Online Access:http://dx.doi.org/10.1111/j.1469-7998.1988.tb03766.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1988.tb03766.x
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spelling crwiley:10.1111/j.1469-7998.1988.tb03766.x 2024-09-30T14:36:12+00:00 Food‐habitat relationship of harbour seals and black cormorants in Skagerrak and Kattegat Härkönen, Tero J. 1988 http://dx.doi.org/10.1111/j.1469-7998.1988.tb03766.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1988.tb03766.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1988.tb03766.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1988.tb03766.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Zoology volume 214, issue 4, page 673-681 ISSN 0952-8369 1469-7998 journal-article 1988 crwiley https://doi.org/10.1111/j.1469-7998.1988.tb03766.x 2024-09-05T05:06:19Z Comparative studies on the food of the black cormorant Phalacrocorax carbo and the harbour seal Phoca vitulina were carried out in two contrasting habitat types. Both species feed predominantly on bottom‐dwelling fish. Black cormorants are able to utilize fish found both on vegetation‐covered and naked sea beds at a water depth of less than 10 m, while harbour seals feed mainly on soft sea bottoms above 30 m where vegetation is scarce or lacking. The food overlap of the two piscivores is large in environments where large shallow sea bottoms are available, and small in areas where sea bottoms of soft material is found at greater depth. In areas where the shallow bottoms are covered by vegetation only, cormorants are able to feed on the fish species inhabiting this kind of environment. There is no evidence that these predators make a choice regarding prey species. Article in Journal/Newspaper harbour seal Phoca vitulina Wiley Online Library Kattegat ENVELOPE(9.692,9.692,63.563,63.563) Journal of Zoology 214 4 673 681
institution Open Polar
collection Wiley Online Library
op_collection_id crwiley
language English
description Comparative studies on the food of the black cormorant Phalacrocorax carbo and the harbour seal Phoca vitulina were carried out in two contrasting habitat types. Both species feed predominantly on bottom‐dwelling fish. Black cormorants are able to utilize fish found both on vegetation‐covered and naked sea beds at a water depth of less than 10 m, while harbour seals feed mainly on soft sea bottoms above 30 m where vegetation is scarce or lacking. The food overlap of the two piscivores is large in environments where large shallow sea bottoms are available, and small in areas where sea bottoms of soft material is found at greater depth. In areas where the shallow bottoms are covered by vegetation only, cormorants are able to feed on the fish species inhabiting this kind of environment. There is no evidence that these predators make a choice regarding prey species.
format Article in Journal/Newspaper
author Härkönen, Tero J.
spellingShingle Härkönen, Tero J.
Food‐habitat relationship of harbour seals and black cormorants in Skagerrak and Kattegat
author_facet Härkönen, Tero J.
author_sort Härkönen, Tero J.
title Food‐habitat relationship of harbour seals and black cormorants in Skagerrak and Kattegat
title_short Food‐habitat relationship of harbour seals and black cormorants in Skagerrak and Kattegat
title_full Food‐habitat relationship of harbour seals and black cormorants in Skagerrak and Kattegat
title_fullStr Food‐habitat relationship of harbour seals and black cormorants in Skagerrak and Kattegat
title_full_unstemmed Food‐habitat relationship of harbour seals and black cormorants in Skagerrak and Kattegat
title_sort food‐habitat relationship of harbour seals and black cormorants in skagerrak and kattegat
publisher Wiley
publishDate 1988
url http://dx.doi.org/10.1111/j.1469-7998.1988.tb03766.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1988.tb03766.x
https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1988.tb03766.x
https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1988.tb03766.x
long_lat ENVELOPE(9.692,9.692,63.563,63.563)
geographic Kattegat
geographic_facet Kattegat
genre harbour seal
Phoca vitulina
genre_facet harbour seal
Phoca vitulina
op_source Journal of Zoology
volume 214, issue 4, page 673-681
ISSN 0952-8369 1469-7998
op_rights http://onlinelibrary.wiley.com/termsAndConditions#vor
op_doi https://doi.org/10.1111/j.1469-7998.1988.tb03766.x
container_title Journal of Zoology
container_volume 214
container_issue 4
container_start_page 673
op_container_end_page 681
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