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Idesia (Arica)

On-line version ISSN 0718-3429

Abstract

NUNEZ, Hipólito; ARRIAZA, Bernardo; GARRIDO, Nicolás  and  VILAXA, Arnaldo. Cytomorphological study about maturation of female gonads of Seriola lalandi from a Recirculating Aquaculture System (RAS). Idesia [online]. 2016, vol.34, n.6, pp.79-83.  Epub Dec 12, 2016. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292016005000037.

Seriola lalandi is a fish that has described their reproductive biology in wild specimens. In particular, the gonadal maturation of this fish has variations by sex and length of each individual. However, fish in captivity, as in the case of cultivation in Aquaculture Recirculation System (SAR), for fattening and subsequent marketing, has not yet been described their gonadal development and its association with long or weight of fish. To contribute to this gap, were selectedfor a year, 30 individuals from the Center for Marine Studies and Limnological (CEMYL) at the University of Tarapaca. These were euthanized in order to conduct the corresponding autopsy, removing the gonads, to which were applied Histological Techniques routine (Hematoxylin - Eosin) and Histochemical Techniques (Picro - Fuchsin Van Gieson and Periodic Acid Schiff). Which resulted in the identification of 6 female, 5 of which were in an immature stage of gonadal growth presenting only oocytes immature in which the nucleus and nucleolus were more abundant than the cytoplasm and one of them had only oogonia that are the precursors oocytes. It is concluded that you can not determine the gonadal maturation in individuals with smaller sizes to 40 cm, as analyzed in this study.

Keywords : teleost; coelomic cavity; mesovárico peritoneum; gonadal maturation.

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