SciELO - Scientific Electronic Library Online

 
vol.31 número4Efecto de la papaína en la cinética de los espermatozoides dellama (Lama glama)Control de la emergencia de la onda folicular mediante laaplicación de benzoato de estradiol, GnRH y ablación folicular en el metaestro tardío en vaquillas de trópico alto índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

  • Não possue artigos citadosCitado por SciELO

Links relacionados

Compartilhar


Revista de Investigaciones Veterinarias del Perú

versão impressa ISSN 1609-9117

Resumo

YONG ROJAS, Carlos; LLERENA ZAVALA, Cielo; MENDOZA TORRES, Galy  e  ECHEVARRIA CUREE, Luisa. Histological characterization of ovarian follicles of Arapaima gigas (Cuvier, 1817) of 12, 18 and 24 months of age. Rev. investig. vet. Perú [online]. 2020, vol.31, n.4, e17221. ISSN 1609-9117.  http://dx.doi.org/10.15381/rivep.v31i4.17221.

The histological description of ovarian follicles of the 12, 18 and 24-month-old paiche (Arapaima gigas) from a fish farm in Iquitos in May 2018 was performed using a convenience sampling. Nine, 13 and 4 fish ovaries of 12, 18 and 24 months, respectively were used. A follicular classification was developed based on the follicular characteristics and based on this, the ovarian follicular ratio, follicular diameters, and the percentage of follicular atresia were determined. The following phases are considered: Perinucleolar (PN), Endogenous vitellogenesis I (VE1), Endogenous vitellogenesis II (VE2) and exogenous vitellogenesis (VEX). The highest frequency of PN follicles was presented at the age of 12 months (p<005), with no significant differences in the frequency of VE1 follicles at 18 and 24 months. VE2 and VEX stages were only observed at 24 months of age. No significant difference was found in the percentage of atresia between ages. The results obtained suggest that the females have apparent characteristics compatible with the onset of an advanced maturation of the ovary from 24 months of age.

Palavras-chave : ovarian follicles; histology; paiche; follicular atresia.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )