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Investigaciones marinas

versión On-line ISSN 0717-7178

Resumen

FABRE, Nidia N.; COUSSEAU, María B.  y  DENEGRI, María A.. Dynamic population of the flatfish Xystreurys rasile, from the Southwestern Atlantic between 34o and 40oS. Investig. mar. [online]. 2001, vol.29, n.1, pp. 83-105. ISSN 0717-7178.  http://dx.doi.org/10.4067/S0717-71782001000100008.

ABSTRACT. The present paper deals with the dynamic population of the flatfish Xystreurys rasile on the Southwest Atlantic between 34º and 40ºS. Increase of mean size of Xystreurys rasile`s shoals was observed to the south. The smallest specimens were found in coastal waters in Spring. Two groups were identified according to the abundance, one northern than 36ºS, characterized with very low captures and the other southern than 37ºS, characterized with higher yields. In Spring mature individuals of X. rasile migrate to shallow waters at 38ºS and southwards for spawning. On the contrary, in autumn they migrate offshore for feeding and growing. First sexual maturity length was estimated in 20.0 cm for males and 21.2 cm for females, corresponding to one and two years respectively. Adult recruitment to the fishing area is around the second and third years of age. Strong evidences enforce that juveniles are not available to the fishing fleet

Palabras llave : structure; dynamics population; flatfish; Xystreurys rasile; Southwest Atlantic.

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