Histological observation of the reproductive system in a viviparous teleost Xenotoca eiseni Rutter 1896 (Cyprinodontiformes: Goodeidae).
histology
reproduction
teleost
viviparity
Journal
Anatomia, histologia, embryologia
ISSN: 1439-0264
Titre abrégé: Anat Histol Embryol
Pays: Germany
ID NLM: 7704218
Informations de publication
Date de publication:
Jan 2021
Jan 2021
Historique:
received:
30
06
2020
revised:
16
08
2020
accepted:
19
08
2020
pubmed:
11
9
2020
medline:
21
10
2021
entrez:
10
9
2020
Statut:
ppublish
Résumé
Xenotoca eiseni is a viviparous teleost belonging to the family Goodeidae. Here, we report histological observations of the reproductive organs in an adult male, an adult female, a pregnant female with intraovarian embryo and an extracted embryo of X. eiseni. High-resolution images of haematoxylin-eosin-stained sagittal sections revealed the detailed structure of gonads, gametes and reproductive components of the mother-embryo relationship. In the male, mature spermatozoa in the epididymis formed sperm packages. In the female, oogenesis proceeded asynchronously in the ovarian wall, and various stages of oocytes were observed in single ovary. In both sexes, genital openings were located between the anus and anal fin. Developing embryos were observed in an ovary of the pregnant female. Fine structures of components of the mother-to-embryo nutrient supply, ovarian septum and trophotaenia were observed in the pregnant ovary. An immature gonad prior to gamete formation was identified in the extracted embryo. With the aim of supporting the development and extension of studies on this viviparous teleost, we have shared our histological images as raw data in an open online archive, the 'NAGOYA repository (http://hdl.handle.net/2237/00032456)'. Our goal is a comprehensive understanding of the viviparous system in fish using both histological observation and molecular biology methods including genomics and proteomics.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
161-168Subventions
Organisme : Japan Society for the Promotion of Science
ID : Grant-in-Aid for Challenging Exploratory Research
Organisme : The Nakatsuji Foresight Foundation
ID : Research Grant
Informations de copyright
© 2020 Wiley-VCH GmbH.
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