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The occurrence of spermatozoa in the ovary of the gynogenetic viviparous teleost P oecilia f ormosa (POECILIIDAE)
Author(s) -
Uribe Mari Carmen,
Grier Harry J.,
De la RosaCruz Gabino,
Schartl Manfred
Publication year - 2016
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.20499
Subject(s) - biology , poeciliidae , ovary , zoology , poecilia , andrology , embryo , parthenogenesis , gestation , sperm , reproduction , anatomy , fish <actinopterygii> , pregnancy , ecology , botany , microbiology and biotechnology , genetics , fishery , medicine
The reproductive mode of the female viviparous teleost Poecilia formosa (Poeciliidae) represents the phenomenon known as gynogenesis; that is, parthenogenetic development is initiated by spermatozoa which are needed for physiological activation of the egg and the initiation of gestation, but spermatozoa are prevented from contributing to the genome of the embryo. For the reason that no previous histological analyses of the ovary of this species during the reproductive cycle has been published the present study has been conducted. This study examined the histology of the ovary of P. formosa during nongestation and gestation phases and identified the presence of spermatozoa inside the ovary. Spermatozoa were observed in folds of the ovarian epithelium of P. formosa during both the nongestation and gestation phases. Sperm storage as documented in this study is a very important trait for the gynogenetic viviparous fish P. formosa contributing to the understanding of this species reproduction. J. Morphol. 277:341–350, 2016. © 2015 Wiley Periodicals, Inc.