Reproductive cycle of male Chinese green tree vipers, Trimeresurus s. stejnegeri, in northern Taiwan

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Reproductive cycle of male Chinese green tree vipers, Trimeresurus s. stejnegeri, in northern Taiwan
出版類型SCI(Sciences Citation Index)
出版年度2000
AuthorsTein-Shun Tsai, 蔡添順, & Ming-Chung Tu 杜銘章
開始頁424
頁數6
出版日期2000 / 9
其他編號0000
中文摘要

We studied the reproductive cycle of male Chinese green tree vipers, Trimeresurus s. stejnegeri, in northern Taiwan by examining seasonal changes in the morphology and histology of their reproductive organs from May 1996 to August 1997. A total of 144 mature males was examined. Based on a histological examination of the seminiferous epithelium, we classified spermatogenesis into five stages: early recrudescence, late recrudescence, spermiogenesis, early regression, and late regression. Testis recrudescence began in the spring. Sperm started to appear in summer and reached a peak in fall. In the winter, testes of most snakes were regressed and sperm disappeared in the lumina of the seminiferous tubules. Throughout the year, sperm were present in the vas deferens. Testis mass peaked in summer, then regressed in winter and early spring. Monthly changes in seminiferous tubule diameter, seminiferous epithelium height, and fat body mass revealed a similar pattern as that of testis. These three parameters were significantly correlated with each other and with temperature and rainfall. Monthly changes in testis and fat body mass were followed by changes in kidney mass. Hypertrophy of the renal sexual segment of T. s. stejnegeri occurred from late summer to winter and might be related to mating activities observed in the same period. As with other viperids, male Chinese green tree vipers exhibited a postnuptial spermatogenesis cycle, which may be confusing when judging from mating activities alone. We proposed another criterion to distinguish postnuptial from prenuptial spermatogenesis.

期刊名稱Journal of Herpetology
校址:912 屏東縣內埔鄉學府路1號 總機:886-8-7703202 傳真:886-8-7740165 系統開發統維護單位:國立屏東科技大學 電算中心 版權所有