Sex steroid levels and leydig cell ultrastructure of the male common sheath-tail bat, taphozous georgianus

Jolly S.E. and Blackshaw A.W. (1989) Sex steroid levels and leydig cell ultrastructure of the male common sheath-tail bat, taphozous georgianus. Reproduction, Fertility and Development, 1 1: 47-53. doi:10.1071/RD9890047


Author Jolly S.E.
Blackshaw A.W.
Title Sex steroid levels and leydig cell ultrastructure of the male common sheath-tail bat, taphozous georgianus
Journal name Reproduction, Fertility and Development   Check publisher's open access policy
ISSN 1448-5990
Publication date 1989
Sub-type Article (original research)
DOI 10.1071/RD9890047
Volume 1
Issue 1
Start page 47
End page 53
Total pages 7
Subject 1103 Clinical Sciences
1309 Developmental Biology
1311 Genetics
1305 Biotechnology
1312 Molecular Biology
1310 Endocrinology
2743 Reproductive Medicine
Abstract Male sheath-tail bats were collected from central Queensland over a 12-month period. Plasma testo­sterone levels peaked in August, coincident with an increase in the volume of the accessory glands and ampulla/seminal vesicle secretion. Peak spermatogenesis occurred in summer and autumn and declined in the face of maximal testosterone levels in winter. Levels of androstenedione and 5a-dihydrotesto- sterone were high compared with testosterone levels and showed no significant seasonal changes. Ultrastructural examination of Leydig cell cytoplasm revealed numerous lipid droplets and mitochondria, and an abundant smooth endoplasmic reticulum. There were no seasonal changes in Leydig cell ultrastructure. The anomalous reproductive pattern in this species is consistent with the imposition of a cold-induced winter spermatogenic shutdown, on a framework of continuous spermatogenesis, with spring peaks in testosterone and accessory gland activity.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 14 Jun 2016, 03:34:33 EST by System User