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dc.contributor.authorNunes, C. (Cristina)
dc.contributor.authorUriarte, A. (Andrés)
dc.contributor.authorDíaz-Conde, M.P. (María Paz) 
dc.contributor.authorPérez-Pérez, J.R. (José Ramón) 
dc.contributor.authorSoares, E.
dc.contributor.authorRiveiro, I. (Isabel) 
dc.contributor.authorAngelico, M.M.
dc.contributor.authorSilva, A.
dc.date.accessioned2017-09-06T08:55:14Z
dc.date.available2017-09-06T08:55:14Z
dc.date.issued2017-02-28
dc.identifier.urihttp://hdl.handle.net/10508/11068
dc.description.abstractMaturity and stock weights at age used in sardine assessment up to 2012 were obatined from (Portuguese and Spanish) spring acoustic surveys biological data. Following a recommendation of the WGANSA, the possible alternative use of the Daily Egg Production Method (DEPM) surveys to estimate maturity at age was evaluated, and a revision of these maturity ogives was undertaken for the last benchmark assessment (Silva et al. 2011, WKPELA 2012), the WG having decided that DEPM maturity ogives should be used in the assessment, and for years with no DEPM survey, 80% of fish mature would be assumed at age 1 (corresponding approximately to the historical mean of DEPM ogives), and for simplicity, 100% of fish are mature at age 2. But these estimates were obtained including information from both DEPM and acoustic surveys: maturity data from the DEPM for each stratum and year were combined to obtain stock estimates, using abundances at age from acoustic surveys as weighting factors; however, in most years, 1-2 months lagged between the two surveys in W and S strata. Revision of weights at age could not be carried out in 2012 due to time constraints, but the WGHANSA believes that it makes more sense that both life history parameters be derived from the same surveys. This WD describes the revision of both maturity and stock weights at age estimates, based uniquely on the DEPM surveys.es_ES
dc.language.isoenges_ES
dc.subjectsardinees_ES
dc.subjectmaturityes_ES
dc.subjectgrowthes_ES
dc.titleRevision of the life history parameters (proportion of mature and mean weights at age) for the Iberian (south) sardine stock (ICES 8c and 9a)es_ES
dc.typeworkingPaperes_ES
dc.identifier.bibliographicCitationWKPELA2017. (06/02/2017 - 10/02/2017. Lisboa, Portugal). 2017.*
dc.publisher.centreCentro Oceanográfico de Vigoes_ES
dc.rights.accessRightsopenAccesses_ES
dc.subject.asfafishes_ES
dc.subject.asfaagees_ES
dc.subject.asfalife historyes_ES
dc.subject.asfahistorical accountes_ES
dc.subject.asfaparameterses_ES


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