Seasonal changes in spermatogenesis (including germ cell degeneration) and plasma testosterone concentration in the grey-headed fruit bat, pteropus poliocephalus

Mc Guckin M.A. and Blackshaw A.W. (1987) Seasonal changes in spermatogenesis (including germ cell degeneration) and plasma testosterone concentration in the grey-headed fruit bat, pteropus poliocephalus. Australian Journal of Biological Sciences, 40 2: 211-220. doi:10.1071/BI9870211


Author Mc Guckin M.A.
Blackshaw A.W.
Title Seasonal changes in spermatogenesis (including germ cell degeneration) and plasma testosterone concentration in the grey-headed fruit bat, pteropus poliocephalus
Journal name Australian Journal of Biological Sciences   Check publisher's open access policy
ISSN 0004-9417
Publication date 1987-01-01
Year available 1987
Sub-type Article (original research)
DOI 10.1071/BI9870211
Open Access Status
Volume 40
Issue 2
Start page 211
End page 220
Total pages 10
Publisher C S I R O PUBLICATIONS
Language eng
Subject 1103 Clinical Sciences
1309 Developmental Biology
1311 Genetics
1305 Biotechnology
1312 Molecular Biology
1310 Endocrinology
2743 Reproductive Medicine
Abstract Maximal testicular size of P. poliocephalus occurred during the February–March–April period (autumn breeding season) associated with maximal plasma levels of testosterone (121·5 ± 23·4 nmol/I). Testicular size decreased after the breeding season concomitant with a decrease in plasma testosterone (7·6 ± 1·7 nmol/I). Histologically, regressive changes were observed in the testis after the breeding season including a decrease in seminiferous tubule diameter and a decrease in Leydig cell nuclear diameter. Significant germ cell loss occurred during the breeding season (44%) mainly during the final spermatogonial division and meiosis and increased in regressed testes (69%), being accentuated chiefly at meiosis. All regressed testes showed some sperm production although it was much reduced after the breeding season; however, optimal fertility appears to be restricted to autumn by the large increases in testosterone secretion which only occur at this time.
Keyword Biology
Life Sciences & Biomedicine - Other Topics
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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