Spatial distribution of the stomach weights of juvenile anchovy (Engraulis encrasicolus L.) in the Bay of Biscay

Handle URI:
http://hdl.handle.net/10754/562425
Title:
Spatial distribution of the stomach weights of juvenile anchovy (Engraulis encrasicolus L.) in the Bay of Biscay
Authors:
Bachiller, Eneko; Cotano, Unai; Boyra, Guillermo; Irigoien, Xabier ( 0000-0002-5411-6741 )
Abstract:
Previous studies have shown that the survival of larval and juvenile anchovy off the continental shelf in the Bay of Biscay is not significantly different from that observed on the shelf, even though the food concentration is significantly higher on the shelf. In this paper we investigate the causes for the lack of relationship between food and survival for anchovy juvenile through analyses of feeding activity versus zooplankton distribution (in the transition from summer to fall from 2003 to 2010). The spatial distribution of the stomach weights of juvenile anchovy in relation to body size on and off the shelf revealed higher stomach fullness in areas off the shelf, where less zooplankton biomass was available. This result indicates that the food concentration is not always the main factor determining ingestion in fish. A situation of comparatively lesser prey abundance may provide better feeding conditions when combined with lower predation risk and lower light attenuation. In addition, the relatively heavier stomachs found in anchovies caught in years of higher recruitment indices suggest a large stomach content may be a symptom of good biological condition that may favour the winter survival of a larger fraction of the juvenile stock. © 2012 International Council for the Exploration of the Sea.
KAUST Department:
Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division; Marine Science Program; Plankton ecology Research Group
Publisher:
Oxford University Press (OUP)
Journal:
ICES Journal of Marine Science
Issue Date:
28-Nov-2012
DOI:
10.1093/icesjms/fss176
Type:
Article
ISSN:
10543139
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Marine Science Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorBachiller, Enekoen
dc.contributor.authorCotano, Unaien
dc.contributor.authorBoyra, Guillermoen
dc.contributor.authorIrigoien, Xabieren
dc.date.accessioned2015-08-03T10:37:45Zen
dc.date.available2015-08-03T10:37:45Zen
dc.date.issued2012-11-28en
dc.identifier.issn10543139en
dc.identifier.doi10.1093/icesjms/fss176en
dc.identifier.urihttp://hdl.handle.net/10754/562425en
dc.description.abstractPrevious studies have shown that the survival of larval and juvenile anchovy off the continental shelf in the Bay of Biscay is not significantly different from that observed on the shelf, even though the food concentration is significantly higher on the shelf. In this paper we investigate the causes for the lack of relationship between food and survival for anchovy juvenile through analyses of feeding activity versus zooplankton distribution (in the transition from summer to fall from 2003 to 2010). The spatial distribution of the stomach weights of juvenile anchovy in relation to body size on and off the shelf revealed higher stomach fullness in areas off the shelf, where less zooplankton biomass was available. This result indicates that the food concentration is not always the main factor determining ingestion in fish. A situation of comparatively lesser prey abundance may provide better feeding conditions when combined with lower predation risk and lower light attenuation. In addition, the relatively heavier stomachs found in anchovies caught in years of higher recruitment indices suggest a large stomach content may be a symptom of good biological condition that may favour the winter survival of a larger fraction of the juvenile stock. © 2012 International Council for the Exploration of the Sea.en
dc.publisherOxford University Press (OUP)en
dc.subjectEuropean anchovyen
dc.subjectJuvenilesen
dc.subjectStomach fullnessen
dc.subjectZooplanktonen
dc.titleSpatial distribution of the stomach weights of juvenile anchovy (Engraulis encrasicolus L.) in the Bay of Biscayen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentMarine Science Programen
dc.contributor.departmentPlankton ecology Research Groupen
dc.identifier.journalICES Journal of Marine Scienceen
dc.contributor.institutionMarine Research Division, AZTI Foundation, Herrera Kaia Portualdea, z/g, 20110, Pasaia (Gipuzkoa), Spainen
kaust.authorIrigoien, Xabieren
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