Analysis of the reproductive potential of two stocks of engraulis anchoita in the argentine sea Reportar como inadecuado




Analysis of the reproductive potential of two stocks of engraulis anchoita in the argentine sea - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

E Leonarduzzi ; JE Hansen ; GJ Macchi ;Ciencias Marinas 2011, 37 (4B)

Autor: M Pájaro

Fuente: http://www.redalyc.org/


Introducción



Ciencias Marinas ISSN: 0185-3880 cmarinas@uabc.mx Universidad Autónoma de Baja California México Pájaro, M; Leonarduzzi, E; Hansen, JE; Macchi, GJ Analysis of the reproductive potential of two stocks of Engraulis anchoita in the Argentine Sea Ciencias Marinas, vol.
37, núm.
4B, 2011, pp.
603-618 Universidad Autónoma de Baja California Ensenada, México Available in: http:--www.redalyc.org-articulo.oa?id=48021256007 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative Ciencias Marinas (2011), 37(4B): 603–618 Analysis of the reproductive potential of two stocks of Engraulis anchoita in the Argentine Sea C M Análisis del potencial reproductivo de dos poblaciones de Engraulis anchoita en el Mar Argentino M Pájaro1*, E Leonarduzzi1, JE Hansen1, GJ Macchi1,2 1 2 Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Paseo V.
Ocampo s-n, B7602HSA, Mar del Plata, Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. * Corresponding author.
E-mail: mpajaro@inidep.edu.ar ABSTRACT.
Relative batch fecundity, spawning frequency, size at 50% maturity, sex ratio, and egg production were estimated for the Bonaerense and Patagonian Engraulis anchoita stocks.
Samples were collected during 19 research surveys carried out over the main spawning seasons and areas of both groups from 1993 to 2008.
Reproductive potential between stocks was compared by analyzing the length-class structure and considering environmental variations.
Daily egg production varied between 0.2 × 107 and 7.3 × 107 oocytes and the mean annual value was higher for the Bonaerense than the Patagonian stock (2.9 × 107 and 0.54 × 107 oocytes, respectively; P 0.019).
In both stocks, larger size classes produced mor...





Documentos relacionados