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  • Title: Effect of nutrition, temperature and photoperiod on the rate of sexual maturation of the field vole (Microtus agrestis).
    Author: Spears N, Clarke JR.
    Journal: J Reprod Fertil; 1987 May; 80(1):175-81. PubMed ID: 3298643.
    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.
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