INIDEP Inf. Téc. 21: 11-27, 1998

INIDEP Inf. Téc. 21: 11-27, 1998

Análisis de la estratificación empleada en campañas de evaluación de recursos demersales costeros en la Zona Común de Pesca Argentino-Uruguaya y en El Rincón, 1994.

Autores: Ricardo G. Perrotta, Carlos A. Lasta y Aníbal Aubone.
Contribución INIDEP 1060


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Citar como:
Perrotta, R.G.; Lasta, C.A.; Aubone, A. 1998. Análisis de la estratificación empleada en campañas de evaluación de recursos demersales costeros en la Zona Común de Pesca Argentino-Uruguaya y en El Rincón, 1994. INIDEP Informe Técnico 21, 11-27. Disponible en: http://hdl.handle.net/1834/2470.

Summary

Analysis of the stratification applied to coastal demersal resources surveys in the Argentine-Uruguaya Common Fishing Zone and El Rincón 1994. The data belong to the demersal fishery research cruise H-13/94. Stratification used for research surveys from the catches values was tested, both for the northern area, Argentine-Uruguayan Common Fishing Zone (AUCFZ) located between 34° and 39°S, and the southern area situated between 38°30′ and 41°30’S (El Rincón, Buenos Aires Prov., Argentina). The variables considered were: croaker and striped weak fish densities and depth. Discriminant factor analysis indicates the formation of two and six strata for the southern and northern areas respectively. The adequate confidential limits of the estimated biomass for each strata obtained for different species, indicate that the criteria for stratification is satisfactory. The number of catches by strata was analyzed as a method that considers the mean variance density and the biomass for each strata by the iteration of samples with different numbers of catches.