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Review

Structures Associated with Oogenesis and Embryonic Development during Intraovarian Gestation in Viviparous Teleosts (Poeciliidae)

by
Mari Carmen Uribe
*,
Gabino De la Rosa Cruz
,
Adriana García Alarcón
,
Juan Carlos Campuzano Caballero
and
María Guadalupe Guzmán Bárcenas
Laboratorio de Biología de la Reproducción Animal Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, México
*
Author to whom correspondence should be addressed.
Fishes 2019, 4(2), 35; https://doi.org/10.3390/fishes4020035
Submission received: 29 March 2019 / Revised: 4 June 2019 / Accepted: 4 June 2019 / Published: 19 June 2019
(This article belongs to the Special Issue Fish Reproductive Physiology and Aquaculture)

Abstract

Viviparity in teleosts involves, invariably, the ovary in a gestational role. This type of viviparity is due to the combination of unique aspects, different from those found in the rest of vertebrates. These aspects are: The ovary has a saccular structure; the germinal epithelium lines the ovarian lumen; the absence of oviducts; and the intraovarian insemination, fertilization, and gestation. The communication of the germinal zone of the ovary to the exterior is via the caudal zone of the ovary—the gonoduct. The germinal epithelium is composed of oogonia and oocytes scattered individually or in cell nests among somatic epithelial cells. In the ovarian stroma the follicles are included which are formed by the oocyte, which is surrounded by follicular cells and the vascularized theca. The oogenesis comprises three stages: chromatin-nucleolus, previtellogenesis, and vitellogenesis. There is no ovulation, as the oocyte is retained in the follicle. During the insemination, the spermatozoa enter into the ovarian lumen and the intrafollicular fertilization occurs, followed by intrafollicular gestation. The intraovarian gestation of poeciliids involves morphological characteristics associated with the intrafollicular embryogenesis and types of nutrition, such as lecithotrophy and matrotrophy. In lecithotrophy, the nutrients come from the yolk reserves stored during oogenesis, whereas in matrotrophy the nutrients are provided by supplies from maternal tissues to the embryo during gestation. The maternal–embryonic metabolic interchanges converge through the development of the association of maternal and embryonic blood vessels, establishing a follicular placenta.
Keywords: saccular ovary; gonoduct; oogenesis; intrafollicular gestation; lecithotrophy; matrotrophy saccular ovary; gonoduct; oogenesis; intrafollicular gestation; lecithotrophy; matrotrophy

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MDPI and ACS Style

Uribe, M.C.; De la Rosa Cruz, G.; García Alarcón, A.; Campuzano Caballero, J.C.; Guzmán Bárcenas, M.G. Structures Associated with Oogenesis and Embryonic Development during Intraovarian Gestation in Viviparous Teleosts (Poeciliidae). Fishes 2019, 4, 35. https://doi.org/10.3390/fishes4020035

AMA Style

Uribe MC, De la Rosa Cruz G, García Alarcón A, Campuzano Caballero JC, Guzmán Bárcenas MG. Structures Associated with Oogenesis and Embryonic Development during Intraovarian Gestation in Viviparous Teleosts (Poeciliidae). Fishes. 2019; 4(2):35. https://doi.org/10.3390/fishes4020035

Chicago/Turabian Style

Uribe, Mari Carmen, Gabino De la Rosa Cruz, Adriana García Alarcón, Juan Carlos Campuzano Caballero, and María Guadalupe Guzmán Bárcenas. 2019. "Structures Associated with Oogenesis and Embryonic Development during Intraovarian Gestation in Viviparous Teleosts (Poeciliidae)" Fishes 4, no. 2: 35. https://doi.org/10.3390/fishes4020035

APA Style

Uribe, M. C., De la Rosa Cruz, G., García Alarcón, A., Campuzano Caballero, J. C., & Guzmán Bárcenas, M. G. (2019). Structures Associated with Oogenesis and Embryonic Development during Intraovarian Gestation in Viviparous Teleosts (Poeciliidae). Fishes, 4(2), 35. https://doi.org/10.3390/fishes4020035

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