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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Centro Oceanográfico de Vigo
2006
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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 |
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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 |
_version_ |
1766342949361156096 |