Review Article
Volume 5 Issue 8 - 2020
The Essential, Complex and Multiple Functions of the Ovary of the Viviparous Teleosts Xenotoca eiseni (Goodeidae) during Non-Gestation and Gestation Stages
Mari Carmen Uribe*, Gabino De la Rosa Cruz, Adriana García Alarcón and Juan Carlos Campuzano Caballero
Laboratorio de Biología de la Reproducción Animal Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Insurgentes, Ciudad de México, Mexico
*Corresponding Author: Mari Carmen Uribe, Laboratorio de Biología de la Reproducción Animal Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Insurgentes, Ciudad de México, Mexico.
Received: June 23, 2020; Published: July 10, 2020


Teleosts show unique features of the female reproductive system compared with the rest of vertebrates which define their viviparity. Teleosts do not have oviducts, therefore, the ovary of viviparous teleosts is the site, not only for the development of oocytes, but also it allows the reception of spermatozoa for the internal fertilization of the oocytes and the intraovarian gestation of offspring until birth; that is intraovarian gestation, unique in vertebrates. The intraluminal gestation proper of X. eiseni as a goodeid, permits that the nutrition of the embryos is complemented by absorption of nutrients obtained from the maternal tissues. The nutrition of X. eiseni during the initial part of gestation by the consumption of yolk is lecithotrophic, but, for the low amount of yolk in the mature oocytes, when the yolk ends, the nutrition is complemented by taking nutrients from the maternal tissues, that is, matrotrophic nutrition. Specifically, the species of Goodeidae have trophotaeniae, extension of the embryonic gut to the lumen of the ovary, used for matrotrophic nutrition.

Keywords: Viviparity; Oogenesis; Yolk; Intraluminal Gestation; Trophotaeniae


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Citation: Mari Carmen Uribe., et al. “The Essential, Complex and Multiple Functions of the Ovary of the Viviparous Teleosts Xenotoca eiseni (Goodeidae) during Non-Gestation and Gestation Stages”. EC Veterinary Science 5.8 (2020): 31-38.

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