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dc.contributor.authorGonzález-Costas, F. (Fernando) 
dc.contributor.authorMurua, H. (Hilario)
dc.date.accessioned2012-08-24T09:04:24Z
dc.date.available2012-08-24T09:04:24Z
dc.date.issued2007-06
dc.identifier.urihttp://hdl.handle.net/10508/791
dc.description.abstractCatch and research survey data from 1992-2005 on the roughhead grenadier stock in NAFO Subareas 2 and 3 are fitted to the eXtended Survivors Analysis (XSA) model. The model results indicated that the stock biomass has been increasing from 1996 to 2005. The biomass estimated for the beginning of 2005 was around 70.000 tonnes, the highest in the time series. Fishing mortality has declined since 1999 and showed the lowest value in the time series in 2005. Over the last few years, there have been two years with very good recruitment at age 3, which may increase the exploitable biomass in the future. The assessment results showed that the current roughhead grenadier Subarea 2 and 3 stock status is healthy. While the analysis indicated that there was a clear retrospective pattern in the model estimates (i.e., fishing mortality being underestimated and total biomass overestimated), the sensitivity analysis showed that the results were robust to the model set up. Although the short time series available, in addition to the wide age composition of this species, the low fishing mortality level estimate by XSA and the lack of convergence in the retrospective analyses, the results showed that the XSA model adequately fitted the data and that the XSA estimated trends are similar to those observed by research surveys. Therefore, it could be concluded that this assessment model may be an appropriate tool to be used in the quantitative assessment of the roughhead grenadier stock in NAFO Subareas 2 and 3.es_ES
dc.language.isoenges_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Españaes_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/es_ES
dc.titleAn analytical assessment of NAFO roughhead grenadier Subareas 2 and 3 stock.es_ES
dc.typeworkingPaperes_ES
dc.identifier.bibliographicCitationGonzález Costas, F., Murua, H. 2007. An analytical assessment of NAFO roughhead grenadier Subareas 2 and 3 stock. NAFO Sci. Coun. Res. Doc. 07/34, Serial Nº N5386: 42p.es_ES
dc.publisher.centreCentro Oceanográfico de Vigoes_ES
dc.coverage.spatialStudyAtlantic Oceanen_US
dc.coverage.spatialStudyNorth Atlanticen_US
dc.coverage.spatialStudyNorthwest Atlanticen_US
dc.coverage.spatialStudyNAFOen_US


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