Food and feeding conditions of herring Clupea harengus in the Norwegian Sea
The feeding ecology of herring was studied using samples collected during cruises in 1994 and 1995. Investigations were carried out in the Møre shelf region off western Norway where the major spawning of herring occurs, and in the off shelf area of the eastern Norwegian Sea, where herring migrate af...
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ftimr:oai:imr.brage.unit.no:11250/105605 2023-05-15T15:15:00+02:00 Food and feeding conditions of herring Clupea harengus in the Norwegian Sea Dalpadado, Padmini Melle, Webjørn Ellertsen, Bjørnar Dommasnes, Are 1996 application/pdf http://hdl.handle.net/11250/105605 eng eng ICES ICES CM Documents;1996/L:20 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105605 36 s. herring sild feeding fôring fish behaviour fiskeatferd VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Working paper 1996 ftimr 2021-09-23T20:15:54Z The feeding ecology of herring was studied using samples collected during cruises in 1994 and 1995. Investigations were carried out in the Møre shelf region off western Norway where the major spawning of herring occurs, and in the off shelf area of the eastern Norwegian Sea, where herring migrate after spawning. Our study shows low feeding activity of herring during their main spawning season with the peak feeding period occurring in June and July. After spawning in February - March herring fed upon euphausiids, mainly Thysanoessa inermis and Meganyctiphanes norvegica on the shelf and at the shelf edge. In late spring and summer herring which had migrated to the Norwegian Sea fed mainly on Calanus finmarchicus, copepodite stages IV and older. In colder waters e.g., waters influenced by East Icelandic Current, C. hyperboreus was important in the diet. In the western part of the Norwegian Sea the zooplankton biomass was dominated by amphipods, Themisto spp., which is also a major prey of herring in that region. Herring were found to feed on fish at only a few stations. The herring showed size selective feeding of copepodite stages of C. finmarchicus and C. hyperboreous. There seem to be no selection between C. finmarchicus and C. hyperboreous when the species were of similar size. Larger prey such as krill were preyed upon regardless of their size. The amount of food ingested by herring in April 1995 was comparatively higher in the Arctic water than in the Atlantic water. The zooplankton biomass showed a similar distribution pattern. The herring seem to be less selective in their feeding behavior in situations with low prey concentrations such as in the warmer Atlantic waters. Report Arctic Calanus finmarchicus Meganyctiphanes norvegica Norwegian Sea Themisto Zooplankton Thysanoessa inermis Institute for Marine Research: Brage IMR Arctic Norwegian Sea Norway |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
herring sild feeding fôring fish behaviour fiskeatferd VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
spellingShingle |
herring sild feeding fôring fish behaviour fiskeatferd VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Dalpadado, Padmini Melle, Webjørn Ellertsen, Bjørnar Dommasnes, Are Food and feeding conditions of herring Clupea harengus in the Norwegian Sea |
topic_facet |
herring sild feeding fôring fish behaviour fiskeatferd VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
description |
The feeding ecology of herring was studied using samples collected during cruises in 1994 and 1995. Investigations were carried out in the Møre shelf region off western Norway where the major spawning of herring occurs, and in the off shelf area of the eastern Norwegian Sea, where herring migrate after spawning. Our study shows low feeding activity of herring during their main spawning season with the peak feeding period occurring in June and July. After spawning in February - March herring fed upon euphausiids, mainly Thysanoessa inermis and Meganyctiphanes norvegica on the shelf and at the shelf edge. In late spring and summer herring which had migrated to the Norwegian Sea fed mainly on Calanus finmarchicus, copepodite stages IV and older. In colder waters e.g., waters influenced by East Icelandic Current, C. hyperboreus was important in the diet. In the western part of the Norwegian Sea the zooplankton biomass was dominated by amphipods, Themisto spp., which is also a major prey of herring in that region. Herring were found to feed on fish at only a few stations. The herring showed size selective feeding of copepodite stages of C. finmarchicus and C. hyperboreous. There seem to be no selection between C. finmarchicus and C. hyperboreous when the species were of similar size. Larger prey such as krill were preyed upon regardless of their size. The amount of food ingested by herring in April 1995 was comparatively higher in the Arctic water than in the Atlantic water. The zooplankton biomass showed a similar distribution pattern. The herring seem to be less selective in their feeding behavior in situations with low prey concentrations such as in the warmer Atlantic waters. |
format |
Report |
author |
Dalpadado, Padmini Melle, Webjørn Ellertsen, Bjørnar Dommasnes, Are |
author_facet |
Dalpadado, Padmini Melle, Webjørn Ellertsen, Bjørnar Dommasnes, Are |
author_sort |
Dalpadado, Padmini |
title |
Food and feeding conditions of herring Clupea harengus in the Norwegian Sea |
title_short |
Food and feeding conditions of herring Clupea harengus in the Norwegian Sea |
title_full |
Food and feeding conditions of herring Clupea harengus in the Norwegian Sea |
title_fullStr |
Food and feeding conditions of herring Clupea harengus in the Norwegian Sea |
title_full_unstemmed |
Food and feeding conditions of herring Clupea harengus in the Norwegian Sea |
title_sort |
food and feeding conditions of herring clupea harengus in the norwegian sea |
publisher |
ICES |
publishDate |
1996 |
url |
http://hdl.handle.net/11250/105605 |
geographic |
Arctic Norwegian Sea Norway |
geographic_facet |
Arctic Norwegian Sea Norway |
genre |
Arctic Calanus finmarchicus Meganyctiphanes norvegica Norwegian Sea Themisto Zooplankton Thysanoessa inermis |
genre_facet |
Arctic Calanus finmarchicus Meganyctiphanes norvegica Norwegian Sea Themisto Zooplankton Thysanoessa inermis |
op_source |
36 s. |
op_relation |
ICES CM Documents;1996/L:20 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105605 |
_version_ |
1766345382741147648 |