首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Effect of nutrition, temperature and photoperiod on the rate of sexual maturation of the field vole (Microtus agrestis)
Authors:N Spears  J R Clarke
Abstract:Weanling male and female field voles were placed in long or short photoperiods, kept at 18 degrees C or 4 degrees C, and fed (ad libitum) diets containing 24%, 16%, 8% and 4% protein, for 6 weeks. Animals in the long photoperiod were more sexually mature than were animals in the short photoperiod. Temperatures had no effect on females, but did affect males: those kept at 4 degrees C had heavier testes and wider seminiferous tubules than those kept at 18 degrees C. There was little difference between the animals on 24%, 16% and 8% protein diets. Animals on 4% protein diets had retarded growth rates and were significantly less sexually mature than those on the other 3 diets, males having smaller testes and seminal vesicles and narrower seminiferous tubules and females having smaller ovaries and uteri.
Keywords:
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号