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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ftcsic:oai:digital.csic.es:10261/328949 2024-02-11T10:01:38+01:00 Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic González-Iglesias María de la Concepción Paz, Xabier Román-Marcote, Esther Álvarez-Pérez, María Soledad Atlantic Ocean North Atlantic Northeast Atlantic ICES Arctic Ocean Greenland Sea Flemish Cap 2006-09 http://hdl.handle.net/10508/691 http://hdl.handle.net/10261/328949 en eng Centro Oceanográfico de Vigo NAFO Scientific Council Research (SCR) Documents, NAFO SCR Doc. 06/52 Serial Nº N5284. 2006: 1-16 http://hdl.handle.net/10508/691 http://hdl.handle.net/10261/328949 5756 open Centro Oceanográfico de Vigo Pesquerías artículo http://purl.org/coar/resource_type/c_6501 2006 ftcsic 2024-01-16T11:49:35Z 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 Digital.CSIC (Spanish National Research Council) Arctic Arctic Ocean Greenland Svalbard |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Centro Oceanográfico de Vigo Pesquerías |
spellingShingle |
Centro Oceanográfico de Vigo Pesquerías González-Iglesias María de la Concepción Paz, Xabier Román-Marcote, Esther Álvarez-Pérez, María Soledad Feeding Habits of Wolffishes (Anarhichas denticulatus, A. lupus, A. minor) in the North Atlantic |
topic_facet |
Centro Oceanográfico de Vigo Pesquerías |
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 María de la Concepción Paz, Xabier Román-Marcote, Esther Álvarez-Pérez, María Soledad |
author_facet |
González-Iglesias María de la Concepción Paz, Xabier Román-Marcote, Esther Álvarez-Pérez, María Soledad |
author_sort |
González-Iglesias |
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 |
publishDate |
2006 |
url |
http://hdl.handle.net/10508/691 http://hdl.handle.net/10261/328949 |
op_coverage |
Atlantic Ocean North Atlantic Northeast Atlantic ICES Arctic Ocean Greenland Sea Flemish Cap |
geographic |
Arctic Arctic Ocean Greenland Svalbard |
geographic_facet |
Arctic Arctic Ocean Greenland Svalbard |
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 |
Centro Oceanográfico de Vigo NAFO Scientific Council Research (SCR) Documents, NAFO SCR Doc. 06/52 Serial Nº N5284. 2006: 1-16 http://hdl.handle.net/10508/691 http://hdl.handle.net/10261/328949 5756 |
op_rights |
open |
_version_ |
1790597421400588288 |