1993 - INIDEP Documento Científico Nro 2

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Browsing 1993 - INIDEP Documento Científico Nro 2 by Author "Perrotta, R.G."

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    Comparación mediante el empleo de los caracteres merísticos y el crecimiento de caballas originarias de varias regiones geográficas (Cataluña, Islas Canarias y Sudamerica)
    (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero, 1993) Perrotta, R.G.
    Mackerel from SW Atlantic (22° -39°S) and the coast of Cataluña (42° 30'N) were compared by analizing both morphometric and meristic characters. A multivariate analysis, i.e. principal components was used. The growth curves corresponding to mackerels from different regions (Canarias, North of Chile, Mar del Plata and Rincón in Argentine) were also compared, as well as the mean length at ages 1 and 2 (Mar del Plata- Cataluña, Rincón- Cataluña). Significant differences in the growth were found between two groups. The first group was integrated by three SW Atlantic population (Brasil, Mar del Plata, Rincón), which possible conform a subspecies of Scomber japonicus. The second one was represented by the coastal mackerel off Cataluña.
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    Sobre la dinámica poblacional de la caballa en la pesquería de Mar del Plata. Período 1980-1990
    (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero, 1993) Perrotta, R.G.; Pertierra, J.P.
    This species is a principal basic product of the local canned industry. The results show that the biomass and capture were variable for the studied period as a consequence of change in the capturability, and the fishstock is underexploited. Also was estimated the contribution of recruitment, growth and mortality in the total biomass.