Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)

In stock-recruitment relationships, spawning stock biomass (SSB) has traditionally been assumed to be equivalent to total egg production (TEP); however, in the last decade a number of studies have indicated the need to include more biological complexity in measures of reproductive potential and advo...

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Detalhes bibliográficos
Autores: Pérez-Rodríguez, Alfonso, Morgan, M. Joanne, Rideout, R. M., Domínguez-Petit, Rosario, Saborido-Rey, Fran
Tipo de documento: artigo
Data de publicação:2011
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/44796
Acesso em linha:http://hdl.handle.net/10261/44796
Access Level:Acceso aberto
Palavra-chave:Reproductive potential
Recruitment
Fecundity
Maturation
Sex ratio
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spelling Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)Estudio de la relación entre la producción total de huevos, la biomasa de hembras reproductoras y el reclutamiento del bacalao (Gadus morhua) de Flemish CapPérez-Rodríguez, AlfonsoMorgan, M. JoanneRideout, R. M.Domínguez-Petit, RosarioSaborido-Rey, FranReproductive potentialRecruitmentFecundityMaturationSex ratioIn stock-recruitment relationships, spawning stock biomass (SSB) has traditionally been assumed to be equivalent to total egg production (TEP); however, in the last decade a number of studies have indicated the need to include more biological complexity in measures of reproductive potential and advocate the use of TEP instead of SSB. The relationship between fecundity and length is often used to estimate TEP. In that case, the equations used to estimate female spawning stock biomass (FSSB) and TEP only differ in the coefficients determining the fecundity and weight relationships with length. In the present paper, TEP and FSSB have been estimated for Flemish Cap cod (Gadus morhua) for the period from 1978 to 2008. Total egg production was calculated using six different fecundity-length relationships applied to the whole time series in each case. A greater difference between the allometric coefficient in the weight-length and fecundity-length relationships led to a lower correlation between FSSB and TEP. The TEP time series using higher fecundity allometric coefficients explained a greater proportion of recruitment variance. Despite this pattern, correlation between FSSB and TEP was always higher than 0.96. These results support the necessity of making annual estimates of potential fecundity and studying its relation not only to length but to other variables, such as fish condition, in order to really get an improvement of TEP over FSSB as a predictive variable in recruitment assessments.This study was funded/supported by the European project “Fisheries-induced Evolution” (FinE, 044276) and COST Action “Fish Reproduction and Fisheries” (FRESH, FA0601). We especially thank all the people involved in sampling and data processing during the Flemish Cap surveys conducted since 1977. Thanks to the Editing Committee of the I Iberoamerican Symposium of Reproductive Ecology, Recruitment and Fisheries (SIBECORP) for selecting our study and giving us the opportunity of publishing it in this special issue of Ciencias Marinas.Peer reviewed201220122011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/44796reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/447962026-05-22T06:33:51Z
dc.title.none.fl_str_mv Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
Estudio de la relación entre la producción total de huevos, la biomasa de hembras reproductoras y el reclutamiento del bacalao (Gadus morhua) de Flemish Cap
title Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
spellingShingle Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
Pérez-Rodríguez, Alfonso
Reproductive potential
Recruitment
Fecundity
Maturation
Sex ratio
title_short Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
title_full Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
title_fullStr Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
title_full_unstemmed Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
title_sort Study of the relationship between total egg production, female spawning stock biomass, and recruitment of Flemish Cap cod (Gadus morhua)
dc.creator.none.fl_str_mv Pérez-Rodríguez, Alfonso
Morgan, M. Joanne
Rideout, R. M.
Domínguez-Petit, Rosario
Saborido-Rey, Fran
author Pérez-Rodríguez, Alfonso
author_facet Pérez-Rodríguez, Alfonso
Morgan, M. Joanne
Rideout, R. M.
Domínguez-Petit, Rosario
Saborido-Rey, Fran
author_role author
author2 Morgan, M. Joanne
Rideout, R. M.
Domínguez-Petit, Rosario
Saborido-Rey, Fran
author2_role author
author
author
author
dc.subject.none.fl_str_mv Reproductive potential
Recruitment
Fecundity
Maturation
Sex ratio
topic Reproductive potential
Recruitment
Fecundity
Maturation
Sex ratio
description In stock-recruitment relationships, spawning stock biomass (SSB) has traditionally been assumed to be equivalent to total egg production (TEP); however, in the last decade a number of studies have indicated the need to include more biological complexity in measures of reproductive potential and advocate the use of TEP instead of SSB. The relationship between fecundity and length is often used to estimate TEP. In that case, the equations used to estimate female spawning stock biomass (FSSB) and TEP only differ in the coefficients determining the fecundity and weight relationships with length. In the present paper, TEP and FSSB have been estimated for Flemish Cap cod (Gadus morhua) for the period from 1978 to 2008. Total egg production was calculated using six different fecundity-length relationships applied to the whole time series in each case. A greater difference between the allometric coefficient in the weight-length and fecundity-length relationships led to a lower correlation between FSSB and TEP. The TEP time series using higher fecundity allometric coefficients explained a greater proportion of recruitment variance. Despite this pattern, correlation between FSSB and TEP was always higher than 0.96. These results support the necessity of making annual estimates of potential fecundity and studying its relation not only to length but to other variables, such as fish condition, in order to really get an improvement of TEP over FSSB as a predictive variable in recruitment assessments.
publishDate 2011
dc.date.none.fl_str_mv 2011
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/44796
url http://hdl.handle.net/10261/44796
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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