Precisión en las evaluaciones por área barrida de algunos peces demersales costeros entre los 34º S Y 42º S, Atlántico Sudoccidental

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dc.bibliographicCitation.endpage33
dc.bibliographicCitation.stpage1
dc.bibliographicCitation.titleINIDEP Informe Técnicoes
dc.bibliographicCitation.volume78
dc.contributor.authorHansen, J.E.
dc.contributor.authorHozbor, N.
dc.contributor.authorLagos, A. Nerina
dc.contributor.authorMartos, Patricia
dc.coverage.spatialAtlántico Sudoccidental
dc.coverage.spatialArgentina
dc.coverage.spatialUruguay
dc.coverage.spatialBuenos Aires
dc.date.accessioned2014-09-15T15:28:13Z
dc.date.available2014-09-15T15:28:13Z
dc.date.issued2010
dc.descriptionevaluación de stock, relevamientos pesqueros, pesquería costera, estratificación, análisis espacial, peces demersales, modelado, Micropogonias furnieri, Mustelus schmitti, Cynoscion guatucupa, Squatina guggenheim, Percophis brasiliensis, Sympterygia bonapartii, corvina, gatuzo, pescadilla de red, pez ángel, pez palo, raya marmoradaother
dc.description.abstractTo estimate the biomass of six species, the stratified design used at present for demersal coastal fish stocks is compared against other design alternatives. Density data (t mn-2 between 34ºS and 42ºS, from the coast line to 50m depth, corresponding to whitemouth croaker (Micropogonias furnieri), patagonian smoothhound (Mustelus schmitti), stripped) weakfish (Cynoscion guatucupa), angular angel shark (Squatina guggenheim), brazilian flathead (Percophis brasiliensis) and skate (Sympterygia bonapartii) collected in surveys carried out in spring and winter in the Argentine Sea (SW Atlantic), were analyzed. The spatial distribution of the species was strongly contagious and influenced by bottom salinity. Different marine zones that showed special salinity features for a long time were defined to test bounded strata accordingly. The simple random design caused, in general, greater uncertainty than any of the stratified designs when using the 17 fixed strata surveyed during the last cruises or when two ‘new designs’ that included 7 strata, different for spring and winter, were adopted. Although no stratified scheme showed superiority to assess all and every species, their comparative advantages are discussed. Assessments made with the design used at present seem to be less efficient in winter thus suggesting that, in the future, surveys should be carried out in spring. No great differences among designs were found when the efficiency gain-sample size relation was studied and that resulted very low above 150 trawls if compared to the cost of using the research vessel.en
dc.description.notesswept area
dc.description.notesmarine environment
dc.description.statusPublisheden
dc.identifier.citationINIDEP Informe Técnico (78), p. 1-33
dc.identifier.issn0327-9642
dc.identifier.urihttps://marabierto.inidep.edu.ar/handle/inidep/151
dc.language.isoes
dc.publisherInstituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata
dc.subject.asfaStock assessmenten
dc.subject.asfafishery surveysen
dc.subject.asfacoastal fisheriesen
dc.subject.asfastratificationen
dc.subject.asfaspatial analysisen
dc.subject.asfamodellingen
dc.subject.asfademersal fishen
dc.titlePrecisión en las evaluaciones por área barrida de algunos peces demersales costeros entre los 34º S Y 42º S, Atlántico Sudoccidentales
dc.title.alternativePrecision in the swept area assessments of some demersal coastal fish stocks between 34º S and 42º S, Southwest Atlanticen
dc.typeJournal Contribution
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INIDEP Informe Técnico Nro 78 (2010)