Morphological and histochemical characteristics of the epithelium of ovarian lamellae of Genypterus blacodes

FREIJO RO; GARCIA AM; PORTIANSKY EL; BARBEITO CG; MACHI G; DÍAZ AO

FISH PHYSIOLOGY AND BIOCHEMISTRY

Springer

Lugar: Namur, Belgium; Año: 2009 vol. 35 p. 359 - 367

0920-1742

The physiological significance of the glycoproteins (GPs) secreted by the epithelium of ovarian lamellae is discussed in reference to the reproductive biology of G. blacodes. Histochemical procedures for localising and characterising GPs were used to determine the cytoplasmic components of cells of the epithelium that covers the ovarian lamellae of pink cuskeel, Genypterus blacodes (Schneider, 1801) (Pisces, Ophidiidae), during spawning. This species is one of the most valuable demersal fish resources in the Argentine Sea, mainly due its large size and flesh quality. GPs with oxidizable vicinal diol groups, sialic acid with or without O-acyl substituents, O-acyl sugars, neutral sugars and GPs with carboxyl and sulphate groups were detected.