Morphology and ultrastructure of pink cusk-eel (Genypterus blacodes, Schneider 1801) spermatozoa by scanning and transmission electron microscopy
Date
Authors
FIGUEROA VILLALOBOS, ELIAS GUSTAVO
VALDEBENITO ISLER, NEMESIO IVAN
Dumorné, Kelly
Valdebenito, Iván
Risopatron, Jennie
Villalobos, Elías Figueroa
Díaz, Rommy
Farias, Jorge G.
VALDEBENITO ISLER, NEMESIO IVAN
Dumorné, Kelly
Valdebenito, Iván
Risopatron, Jennie
Villalobos, Elías Figueroa
Díaz, Rommy
Farias, Jorge G.
Authors
Date
Datos de publicación:
10.1016/j.tice.2018.07.005
Keywords
Genypterus Blacodes,spermatozoa - Morphology - Scanning Electron Microscopy - Transmission Electron Microscopy - Ultrastructure - Animal Cell - Article - Axoneme - Cell Membrane - Cell Nucleus - Cell Ultrastructure - Eel - Fertilization - Genypterus Blacode - Male - Mitochondrion - Nonhuman - Scanning Electron Microscopy - Species Diversity - Spermatozoon - Spermatozoon Head - Spermatozoon Midpiece - Spermatozoon Tail - Transmission Electron Microscopy - Anatomy And Histology - Animal - Ultrastructure - Animals - Eels - Male - Microscopy, Electron, Scanning - Microscopy, Electron, Transmission - Spermatozoa
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Abstract
In this study, the morphology and ultrastructure of Genypterus blacodes spermatozoa were characterized through scanning and transmission electron microscopy. Findings revealed that the G. blacodes spermatozoa can be differentiated into three major parts: a spherical head without an acrosome (typical for externally fertilizing fish), a short mid-piece, and a long flagellum. The mean length of the spermatozoa was 57.6 ± 6.08 ?m, with flagella accounting for 56.2 ± 7.2 ?m. The head was 1.47 ± 0.2 ?m long, and 0.89 ± 0.06 ?m wide. The mid-piece had a total dimension of 0.72 ± 0.16 ?m, and was 0.31 ± 0.02 ?m in length and 0.6 ± 0.05 ?m in width. It was located lateral to the nucleus and contained 4 or 5 spherical mitochondria. The mitochondria were separated from the axoneme by a cytoplasmic canal. The main piece of the flagellum had short irregular side-fins, and the axoneme was composed of the typical 9 + 2 microtubular doublet structure enclosed by a cell membrane. The present study reveals that G. blacodes sperm can be categorized as a primitive type. This study is the first to provide comprehensive details on the morphology and ultrastructure of spermatozoa in G. blacodes. © 2018 Elsevier B.V., All rights reserved.
Description
Keywords
Genypterus Blacodes,spermatozoa , Morphology , Scanning Electron Microscopy , Transmission Electron Microscopy , Ultrastructure , Animal Cell , Article , Axoneme , Cell Membrane , Cell Nucleus , Cell Ultrastructure , Eel , Fertilization , Genypterus Blacode , Male , Mitochondrion , Nonhuman , Scanning Electron Microscopy , Species Diversity , Spermatozoon , Spermatozoon Head , Spermatozoon Midpiece , Spermatozoon Tail , Transmission Electron Microscopy , Anatomy And Histology , Animal , Ultrastructure , Animals , Eels , Male , Microscopy, Electron, Scanning , Microscopy, Electron, Transmission , Spermatozoa
Citation
10.1016/j.tice.2018.07.005