Modelling the spatio-temporal distribution of age-1 bay of biscay anchovy (Engraulis encrasicolus) at spawning time [Distribución espacio-temporal de la edad 1 de anchoa del golfo de Bizkaia (Engraulis Encrasicolus) en el momento de puesta]

Handle URI:
http://hdl.handle.net/10754/562975
Title:
Modelling the spatio-temporal distribution of age-1 bay of biscay anchovy (Engraulis encrasicolus) at spawning time [Distribución espacio-temporal de la edad 1 de anchoa del golfo de Bizkaia (Engraulis Encrasicolus) en el momento de puesta]
Authors:
Ibaibarriaga, Leire; Uriarte, Andrés; Laconcha, Urtzi; Bernal, Miguel C.; Begoña Santos, Maria; Chifflet, Marina; Irigoien, Xabier ( 0000-0002-5411-6741 )
Abstract:
To efficiently manage and maintain fish stock abundance and age structure, it is necessary to understand variability in its spatial distribution. The main objective of this study was to describe the demographic structure of the Bay of Biscay anchovy during the main spawning period based on adult samples from 15 daily egg production method surveys. The proportion of age-1 individuals was modelled using generalized additive models with a binomial distribution and a logit link in relation to geographical and environmental covariates. The possibility of obtaining different models depending on the average age-1 proportion (low or high) was also explored. In general, age-1 individuals were found in shallow waters close to the coast, especially associated with the Gironde and Adour river plumes, whereas older individuals were prevalent on the shelf break and in oceanic waters. However, in years with a high age-1 proportion the younger individuals were also dominant in oceanic waters. These results could be used for management purposes, such as defining protected areas for particular age groups.
KAUST Department:
Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division; Marine Science Program; Plankton ecology Research Group
Publisher:
Departmento de Publicaciones del CSIC
Journal:
Scientia Marina
Issue Date:
13-Sep-2013
DOI:
10.3989/scimar.03851.05C
Type:
Article
ISSN:
02148358
Sponsors:
Thanks are due to IFREMER, and especially to Jacques Masse, for providing the adult samples from the PELGAS acoustic survey. We also thank Inaki Rico for his work in otolith readings. Two anonymous referees provided valuable comments that helped to improve the manuscript. This study was funded by the Department of Agriculture and Fisheries of the Basque Country Government, the projects ECOANCHOA, REPRODUCE and the EU Project UNCOVER (Contract No. 022717). The work of Urtzi Laconcha was part of his MSc thesis at the University of Cadiz. This paper is contribution number 646 from AZTI-Tecnalia (Marine Research Division).
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.authorIbaibarriaga, Leireen
dc.contributor.authorUriarte, Andrésen
dc.contributor.authorLaconcha, Urtzien
dc.contributor.authorBernal, Miguel C.en
dc.contributor.authorBegoña Santos, Mariaen
dc.contributor.authorChifflet, Marinaen
dc.contributor.authorIrigoien, Xabieren
dc.date.accessioned2015-08-03T11:17:43Zen
dc.date.available2015-08-03T11:17:43Zen
dc.date.issued2013-09-13en
dc.identifier.issn02148358en
dc.identifier.doi10.3989/scimar.03851.05Cen
dc.identifier.urihttp://hdl.handle.net/10754/562975en
dc.description.abstractTo efficiently manage and maintain fish stock abundance and age structure, it is necessary to understand variability in its spatial distribution. The main objective of this study was to describe the demographic structure of the Bay of Biscay anchovy during the main spawning period based on adult samples from 15 daily egg production method surveys. The proportion of age-1 individuals was modelled using generalized additive models with a binomial distribution and a logit link in relation to geographical and environmental covariates. The possibility of obtaining different models depending on the average age-1 proportion (low or high) was also explored. In general, age-1 individuals were found in shallow waters close to the coast, especially associated with the Gironde and Adour river plumes, whereas older individuals were prevalent on the shelf break and in oceanic waters. However, in years with a high age-1 proportion the younger individuals were also dominant in oceanic waters. These results could be used for management purposes, such as defining protected areas for particular age groups.en
dc.description.sponsorshipThanks are due to IFREMER, and especially to Jacques Masse, for providing the adult samples from the PELGAS acoustic survey. We also thank Inaki Rico for his work in otolith readings. Two anonymous referees provided valuable comments that helped to improve the manuscript. This study was funded by the Department of Agriculture and Fisheries of the Basque Country Government, the projects ECOANCHOA, REPRODUCE and the EU Project UNCOVER (Contract No. 022717). The work of Urtzi Laconcha was part of his MSc thesis at the University of Cadiz. This paper is contribution number 646 from AZTI-Tecnalia (Marine Research Division).en
dc.publisherDepartmento de Publicaciones del CSICen
dc.subjectAnchovyen
dc.subjectBay of biscayen
dc.subjectDaily egg production methoden
dc.subjectEnvironmental effectsen
dc.subjectGeneralized additive modelen
dc.subjectSpatial age compositionen
dc.titleModelling the spatio-temporal distribution of age-1 bay of biscay anchovy (Engraulis encrasicolus) at spawning time [Distribución espacio-temporal de la edad 1 de anchoa del golfo de Bizkaia (Engraulis Encrasicolus) en el momento de puesta]en
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.journalScientia Marinaen
dc.contributor.institutionAZTI-Tecnalia, Marine Research Division, Txatxarramendi Ugartea z/g, 48395 Sukarrieta, Spainen
dc.contributor.institutionAZTI-Tecnalia, Marine Research Division, Herrera Kaia Portualdea z/g, 20110 Pasaia, Spainen
dc.contributor.institutionCentro Oceanográfico de Cádiz, Instituto Español de Oceanografía, Cádiz 11006, Spainen
kaust.authorIrigoien, Xabieren
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