Penzhorn B L, van der Merwe N J
Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Republic of South Africa.
J Reprod Fertil. 1988 May;83(1):371-5. doi: 10.1530/jrf.0.0830371.
Testis mass of adult Cape mountain zebra stallions (mean 70.0 g) was appreciably less than that of other zebra species and domestic horses. The histological appearance of the testes of 11-, 24- and 29-month-old colts was typically prepubertal. Spermatogenic activity of a 4-year-old stallion obtained at the end of summer was at a very low level, while a 4.5-year-old stallion obtained 6 weeks after the winter solstice showed a marked increase in spermatogenesis compared with the 4-year-old. Stallions 6.5-19 years of age collected in different seasons all showed active spermatogenesis.
成年南非山斑马种马的睾丸重量（平均70.0克）明显低于其他斑马物种和家马。11个月、24个月和29个月大的雄驹睾丸的组织学外观典型地处于青春期前。一匹在夏末获取的4岁种马的精子发生活性处于非常低的水平，而一匹在冬至后6周获取的4.5岁种马与4岁种马相比，精子发生显著增加。在不同季节采集的6.5至19岁的种马均表现出活跃的精子发生。
