Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic

Feeding habits of 7995 individuals of three wolffish species distributed in the north Atlantic were analyzed: 1016 of northern wolffish (Anarhichas denticulatus), 4783 of Atlantic wolffish (A. lupus) and 2196 of spotted wolffish (A. minor). The individuals sampled were taken in the NAFO Area Divisio...

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Main Authors: González-Iglesias, M.C. (María de la Concepción), Paz, X. (Xabier), Román-Marcote, E. (Esther), Álvarez-Pérez, M.S. (María Soledad)
Format: Article in Journal/Newspaper
Language:English
Published: Centro Oceanográfico de Vigo 2006
Subjects:
Online Access:http://hdl.handle.net/10508/691
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spelling ftieo:oai:repositorio.ieo.es:10508/691 2023-05-15T15:12:14+02:00 Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic González-Iglesias, M.C. (María de la Concepción) Paz, X. (Xabier) Román-Marcote, E. (Esther) Álvarez-Pérez, M.S. (María Soledad) Atlantic Ocean North Atlantic Northeast Atlantic ICES Arctic Ocean Greenland Sea Flemish Cap 2006-09 http://hdl.handle.net/10508/691 eng eng Centro Oceanográfico de Vigo http://hdl.handle.net/10508/691 NAFO Scientific Council Research (SCR) Documents, NAFO SCR Doc. 06/52 Serial Nº N5284. 2006: 1-16 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ CC-BY-NC-ND article 2006 ftieo 2022-07-26T23:46:48Z Feeding habits of 7995 individuals of three wolffish species distributed in the north Atlantic were analyzed: 1016 of northern wolffish (Anarhichas denticulatus), 4783 of Atlantic wolffish (A. lupus) and 2196 of spotted wolffish (A. minor). The individuals sampled were taken in the NAFO Area Divisions 3NO in spring in the period 2002-2005, Div. 3L in summer in the period 2003-2004, Div. 3M in summer in the period 1993-2005, and in the ICES Area Div. IIb in autumn in the period 2004-2005. Feeding intensity was higher in the NAFO Area than in the northeast Atlantic (spring-summer vs. autumn), mainly in spotted wolffish in Div. 3M. The importance of each prey taxa was evaluated using the weight percentage. Wolffish species diet showed geographical differences. Ontogenic diet changes and prey variation through the studied period were observed, mainly in Atlantic and spotted wolffishes. This two species preyed primarialy on bottom (echinoderms, gastropods and bivalves) and benthopelagic (northern shrimp and redfish) organisms on Flemish Cap and Grand Bank. However fish and northern shrimp predation were more important on the Flemish Cap, mainly in spotted wolffish, showing periods with higher predation on these prey when the biomass of these prey species increased. This fact might have been the cause of diet overlap between Atlantic and spotted wolffishes in some periods in Div. 3M. Less ontogenic, annual and geographical diet variations were found in northern wolffish in NAFO Area, feeding mainly on ctenophores; however in Svalbard area, this species showed to be highly piscivore. Three species showed cannibalism but only in the Div. 3M. Article in Journal/Newspaper Arctic Arctic Ocean Greenland Greenland Sea North Atlantic Northeast Atlantic northern shrimp Svalbard Instituto Español de Oceanografía: e-IEO Arctic Arctic Ocean Svalbard Greenland
institution Open Polar
collection Instituto Español de Oceanografía: e-IEO
op_collection_id ftieo
language English
description Feeding habits of 7995 individuals of three wolffish species distributed in the north Atlantic were analyzed: 1016 of northern wolffish (Anarhichas denticulatus), 4783 of Atlantic wolffish (A. lupus) and 2196 of spotted wolffish (A. minor). The individuals sampled were taken in the NAFO Area Divisions 3NO in spring in the period 2002-2005, Div. 3L in summer in the period 2003-2004, Div. 3M in summer in the period 1993-2005, and in the ICES Area Div. IIb in autumn in the period 2004-2005. Feeding intensity was higher in the NAFO Area than in the northeast Atlantic (spring-summer vs. autumn), mainly in spotted wolffish in Div. 3M. The importance of each prey taxa was evaluated using the weight percentage. Wolffish species diet showed geographical differences. Ontogenic diet changes and prey variation through the studied period were observed, mainly in Atlantic and spotted wolffishes. This two species preyed primarialy on bottom (echinoderms, gastropods and bivalves) and benthopelagic (northern shrimp and redfish) organisms on Flemish Cap and Grand Bank. However fish and northern shrimp predation were more important on the Flemish Cap, mainly in spotted wolffish, showing periods with higher predation on these prey when the biomass of these prey species increased. This fact might have been the cause of diet overlap between Atlantic and spotted wolffishes in some periods in Div. 3M. Less ontogenic, annual and geographical diet variations were found in northern wolffish in NAFO Area, feeding mainly on ctenophores; however in Svalbard area, this species showed to be highly piscivore. Three species showed cannibalism but only in the Div. 3M.
format Article in Journal/Newspaper
author González-Iglesias, M.C. (María de la Concepción)
Paz, X. (Xabier)
Román-Marcote, E. (Esther)
Álvarez-Pérez, M.S. (María Soledad)
spellingShingle González-Iglesias, M.C. (María de la Concepción)
Paz, X. (Xabier)
Román-Marcote, E. (Esther)
Álvarez-Pérez, M.S. (María Soledad)
Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic
author_facet González-Iglesias, M.C. (María de la Concepción)
Paz, X. (Xabier)
Román-Marcote, E. (Esther)
Álvarez-Pérez, M.S. (María Soledad)
author_sort González-Iglesias, M.C. (María de la Concepción)
title Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic
title_short Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic
title_full Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic
title_fullStr Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic
title_full_unstemmed Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic
title_sort feeding habits of wolffishes (anarhichas denticulatus, a. lupus, a. minor) in the north atlantic
publisher Centro Oceanográfico de Vigo
publishDate 2006
url http://hdl.handle.net/10508/691
op_coverage Atlantic Ocean
North Atlantic
Northeast Atlantic
ICES
Arctic Ocean
Greenland Sea
Flemish Cap
geographic Arctic
Arctic Ocean
Svalbard
Greenland
geographic_facet Arctic
Arctic Ocean
Svalbard
Greenland
genre Arctic
Arctic Ocean
Greenland
Greenland Sea
North Atlantic
Northeast Atlantic
northern shrimp
Svalbard
genre_facet Arctic
Arctic Ocean
Greenland
Greenland Sea
North Atlantic
Northeast Atlantic
northern shrimp
Svalbard
op_relation http://hdl.handle.net/10508/691
NAFO Scientific Council Research (SCR) Documents, NAFO SCR Doc. 06/52 Serial Nº N5284. 2006: 1-16
op_rights Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
op_rightsnorm CC-BY-NC-ND
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