Diel feeding patterns and the development of food webs in pelagic 0-group cod (Gadus morhua L.), haddock (Melanogrammus aeglefinus L.), whiting (Merlangiusmerlangus L.), saithe (Pollachius virens L.), and Norway pout (Trisopterus esmarkii Nilsson) in the northern North Sea
Stomach content analysis was used to investigate feeding interactions between pelagic 0-group gadoids in the northern North Sea. The species studied were cod ( Gadus morhua L.), haddock ( Melanogrammus aeglefinus L.), whiting ( Merlangius merlangus L.), saithe ( Pollachius virens L.) and Norway pout...
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1997
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fthighwire:oai:open-archive.highwire.org:icesjms:54/5/846 2023-05-15T16:19:07+02:00 Diel feeding patterns and the development of food webs in pelagic 0-group cod (Gadus morhua L.), haddock (Melanogrammus aeglefinus L.), whiting (Merlangiusmerlangus L.), saithe (Pollachius virens L.), and Norway pout (Trisopterus esmarkii Nilsson) in the northern North Sea Bromley, P. J. Watson, T. Hislop, J. R. G. 1997-10-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/54/5/846 https://doi.org/10.1006/jmsc.1996.0211 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/54/5/846 http://dx.doi.org/10.1006/jmsc.1996.0211 Copyright (C) 1997, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 1997 fthighwire https://doi.org/10.1006/jmsc.1996.0211 2013-05-27T06:34:15Z Stomach content analysis was used to investigate feeding interactions between pelagic 0-group gadoids in the northern North Sea. The species studied were cod ( Gadus morhua L.), haddock ( Melanogrammus aeglefinus L.), whiting ( Merlangius merlangus L.), saithe ( Pollachius virens L.) and Norway pout ( Trisopterus esmarkii Nilsson). The fish were caught at a site south-east of Shetland in late spring during 24 h depth-stratified fishing using a mid-water trawl. There was overlap in the range of prey consumed by the various species. Fish of 1–3 cm in length fed mainly on copepods and other invertebrates. Larger Norway pout continued to feed almost entirely on copepods, but the other species diversified as they grew to include fish in their diet, cod and whiting becoming almost entirely piscivorous. Haddock and saithe ate moderate amounts of fish combined with crustacea in roughly equal proportions. The depth at which the fish were caught did not appear to influence the range of prey consumed, but fish was slightly more prevalent in the diet of 0-groups caught near the surface. The results indicate that a food web of increasing complexity can develop during a relatively short time scale in late spring when the 0-group gadoids are pelagic. Generalised linear modelling revealed diel feeding patterns which were size-dependent and species-specific. In 2–3 cm cod, for example, peak feeding was during the period 1200–2000 h and high numbers of prey (mainly invertebrates) were consumed. The stomachs of the larger cod (3–5 cm) contained smaller numbers of mainly fish prey and peak feeding switched to 0000–0800 h. The piscivorous 0-groups were capable of eating relatively large prey items, providing the opportunity for larger individuals to eat younger or slower-growing individuals from the same year class. Whiting in particular were subject to substantial levels of cannibalism and inter-specific predation. Feeding interactions of this sort might be of sufficient magnitude to influence significantly the survival and ... Text Gadus morhua Copepods HighWire Press (Stanford University) Norway ICES Journal of Marine Science 54 5 846 853 |
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HighWire Press (Stanford University) |
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topic |
Articles |
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Articles Bromley, P. J. Watson, T. Hislop, J. R. G. Diel feeding patterns and the development of food webs in pelagic 0-group cod (Gadus morhua L.), haddock (Melanogrammus aeglefinus L.), whiting (Merlangiusmerlangus L.), saithe (Pollachius virens L.), and Norway pout (Trisopterus esmarkii Nilsson) in the northern North Sea |
topic_facet |
Articles |
description |
Stomach content analysis was used to investigate feeding interactions between pelagic 0-group gadoids in the northern North Sea. The species studied were cod ( Gadus morhua L.), haddock ( Melanogrammus aeglefinus L.), whiting ( Merlangius merlangus L.), saithe ( Pollachius virens L.) and Norway pout ( Trisopterus esmarkii Nilsson). The fish were caught at a site south-east of Shetland in late spring during 24 h depth-stratified fishing using a mid-water trawl. There was overlap in the range of prey consumed by the various species. Fish of 1–3 cm in length fed mainly on copepods and other invertebrates. Larger Norway pout continued to feed almost entirely on copepods, but the other species diversified as they grew to include fish in their diet, cod and whiting becoming almost entirely piscivorous. Haddock and saithe ate moderate amounts of fish combined with crustacea in roughly equal proportions. The depth at which the fish were caught did not appear to influence the range of prey consumed, but fish was slightly more prevalent in the diet of 0-groups caught near the surface. The results indicate that a food web of increasing complexity can develop during a relatively short time scale in late spring when the 0-group gadoids are pelagic. Generalised linear modelling revealed diel feeding patterns which were size-dependent and species-specific. In 2–3 cm cod, for example, peak feeding was during the period 1200–2000 h and high numbers of prey (mainly invertebrates) were consumed. The stomachs of the larger cod (3–5 cm) contained smaller numbers of mainly fish prey and peak feeding switched to 0000–0800 h. The piscivorous 0-groups were capable of eating relatively large prey items, providing the opportunity for larger individuals to eat younger or slower-growing individuals from the same year class. Whiting in particular were subject to substantial levels of cannibalism and inter-specific predation. Feeding interactions of this sort might be of sufficient magnitude to influence significantly the survival and ... |
format |
Text |
author |
Bromley, P. J. Watson, T. Hislop, J. R. G. |
author_facet |
Bromley, P. J. Watson, T. Hislop, J. R. G. |
author_sort |
Bromley, P. J. |
title |
Diel feeding patterns and the development of food webs in pelagic 0-group cod (Gadus morhua L.), haddock (Melanogrammus aeglefinus L.), whiting (Merlangiusmerlangus L.), saithe (Pollachius virens L.), and Norway pout (Trisopterus esmarkii Nilsson) in the northern North Sea |
title_short |
Diel feeding patterns and the development of food webs in pelagic 0-group cod (Gadus morhua L.), haddock (Melanogrammus aeglefinus L.), whiting (Merlangiusmerlangus L.), saithe (Pollachius virens L.), and Norway pout (Trisopterus esmarkii Nilsson) in the northern North Sea |
title_full |
Diel feeding patterns and the development of food webs in pelagic 0-group cod (Gadus morhua L.), haddock (Melanogrammus aeglefinus L.), whiting (Merlangiusmerlangus L.), saithe (Pollachius virens L.), and Norway pout (Trisopterus esmarkii Nilsson) in the northern North Sea |
title_fullStr |
Diel feeding patterns and the development of food webs in pelagic 0-group cod (Gadus morhua L.), haddock (Melanogrammus aeglefinus L.), whiting (Merlangiusmerlangus L.), saithe (Pollachius virens L.), and Norway pout (Trisopterus esmarkii Nilsson) in the northern North Sea |
title_full_unstemmed |
Diel feeding patterns and the development of food webs in pelagic 0-group cod (Gadus morhua L.), haddock (Melanogrammus aeglefinus L.), whiting (Merlangiusmerlangus L.), saithe (Pollachius virens L.), and Norway pout (Trisopterus esmarkii Nilsson) in the northern North Sea |
title_sort |
diel feeding patterns and the development of food webs in pelagic 0-group cod (gadus morhua l.), haddock (melanogrammus aeglefinus l.), whiting (merlangiusmerlangus l.), saithe (pollachius virens l.), and norway pout (trisopterus esmarkii nilsson) in the northern north sea |
publisher |
Oxford University Press |
publishDate |
1997 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/54/5/846 https://doi.org/10.1006/jmsc.1996.0211 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Gadus morhua Copepods |
genre_facet |
Gadus morhua Copepods |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/54/5/846 http://dx.doi.org/10.1006/jmsc.1996.0211 |
op_rights |
Copyright (C) 1997, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.1996.0211 |
container_title |
ICES Journal of Marine Science |
container_volume |
54 |
container_issue |
5 |
container_start_page |
846 |
op_container_end_page |
853 |
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1766005435987394560 |