Abstract

PEREZ, D. et al. Ovarían morphology andfolliculogenesis in Gymnotus carapo (Linnaeus, 1758). Rev. vet. [online]. 2022, vol.33, n.1, pp.11-16. ISSN 1669-6840.  http://dx.doi.org/10.30972/vet.3315871.

22.

The objective of this work is to study the ovarian morphology and folliculogenesis of Gymnotus carapo, in order to provide information on its reproductive biology, and that this is useful in the management of this species as a fishing resource. 40 female specimens were collected during the period from February to December 2019 from natural environments near the City of Corrientes. After capture, they were anesthetized with 2% lidocaine solution and sacrificed by spinal section. The ovaries were isolated and fixed in 10% formalin; Later they were processed for the conventional histological technique and stained with hematoxylin-eosin (H-E), Gómori trichrome and PAS histochemical reaction. The histological preparations were analyzed through the light microscope. It was observed that the folliculogenesis in G. carapo is similar to that described for other fish. The ovary and oocytes of G. carapo undergo different stages of development: primary and secondary growth, vitellogenesis and maturation during the reproductive cycle, information that provides the basis for future studies on reproductive biology. The information provided in this work is important since it provides a detailed histological study that describes the ovarian morphology and folliculogenesis in G. carapo and contributes to the management and conservation planning of species that are of importance to the fishing resource.

Keywords : fish; reproduction; gametogenesis.

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