English  |  正體中文  |  简体中文  |  Items with full text/Total items : 6491/11663
Visitors : 24612941      Online Users : 56
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/12224

Title: Seasonal Reproductive Activity of Male Formosan Wood Mouse, Apodemus Semotus: Relations to Androgen Levels
Authors: Lee, Chi-Ying;Alexander, Paul S.;Cheng, Vinian V.;Yu, John Yuh-Lin
Contributors: 生物學系
Keywords: Androgen;Apodemus semotus;Reproductive cycle;Spermatogenesis;Wood mouse
Date: 2001-08
Issue Date: 2012-07-03T04:02:27Z
Publisher: BioOne
Abstract: The annual reproductive cycle of adult male Formosan wood mice (Apodemus semotus) collected monthly from the Alishan area, Taiwan, was investigated. Mean monthly body mass varied between 25.0 g ± 0.8 SE and 27.1 ± 1.3 g and did not show significant seasonal change. Mass of reproductive organs, spermatogenic activity, and levels of testicular and plasma androgen exhibited a distinct pattern of seasonal change. Testes, epididymides, and seminal vesicles were lightest and spermatogenesis was virtually arrested in January and December. For the remainder of year, all animals examined were spermatogenically active. However, spermatogenic activity was most intense and reproductive organs were heaviest in March–April and August–September. A decline occurred in mass of reproductive organs and diameter of seminiferous tubules in May–July, but spermatogenesis was unaffected qualitatively. Levels of testicular and plasma androgen were elevated in March–April and August–September, coinciding with periods of intense spermatogenic activity and the heaviest reproductive organs and were significantly correlated with mass of testes, epididymides, and seminal vesicles, and diameter of seminiferous tubules. Day length and temperature, but not precipitation, were correlated with mass of testes, epididymides, and seminal vesicles. This is the 1st study to investigate seasonal patterns of androgen levels in plasma and testes in the genus Apodemus.
Relation: Journal of Mammalogy, 82(3): 700-708
Appears in Collections:[生物學系] 期刊論文

Files in This Item:

File SizeFormat
2020300310005.pdf26KbAdobe PDF308View/Open


All items in NCUEIR are protected by copyright, with all rights reserved.

 


DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback