Revista de Investigación y Desarrollo Pesquero 1982 Nro 3

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Browsing Revista de Investigación y Desarrollo Pesquero 1982 Nro 3 by Subject "Clupeiformes"

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    Estudio de edad y crecimiento de la sardina fueguina (Sprattus fuegensis) de las costas de la provincia de Santa Cruz e Islas Malvinas
    (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), 1982) Cousseau, M.B.; Gru, D.L.
    Samples of Sardina fueguina (Sprattus fuegensis) were taken during research cruises carried out in 1974 and 1978. Length and age frequency distributions were analyzed, and von Bertalanffy growth parameters were calculated for the coastal waters of two geographical regions: Province of Santa Cruz and northern part of Malvinas Islands. Lenght and weight growth curves have been calculated for each region and each year. Marked differences have been found between gowth parameters of both regions, and the calculated values showed a good fit with the observed ones. According to these results, it is possible to assume that the sardines of both regions constitute two different populations. However, more information on the total distribution of the species will have to be obtained in order to confirm the present observations.
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    Revisión taxonómica y análisis de los caracteres morfométricos y merísticos de la sardina fueguina, Sprattus fuegensis (Jenyns, 1842) (Pisces, Clupeidae)
    (Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), 1982) Cousseau, M.B.
    This paper is based on the study of 484 specimens collected off three different districts of Santa Cruz (Caleta Olivia, Puerto Deseado and Río Gallegos)and the northern coastal region of Malvinas Islands. The following items have been developed: -a brief description of the clupeoids present in the southern patagonic area where the sardine lives, and a key to their identification; -the updated systematic position of the species and its bibliographical references; -a description of the external morphology; -a statistical analysis of morphometric and meristic character; and geographic distribution and movements. It is possible to presume the existence of two geographically separated groups, one in the coasts off Santa Cruz Province and another around Malvinas Islands.