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Effect of constant length of day on reproduction in albino mice

Published online by Cambridge University Press:  15 May 2009

Sue Flick Mathewson ,
David E. Davis  and
John J. Christian
Sue Flick Mathewson
Affiliation:
The Johns Hopkins School of Hygiene and Public Health
David E. Davis
Affiliation:
The Johns Hopkins School of Hygiene and Public Health
John J. Christian
Affiliation:
Naval Medical Research Institute, Bethesda, Maryland
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Studies on reproduction in a colony of albino mice before and after length of daylight was made constant show no change in litter size. However, there was an increase in the number of post-partum pregnancies after light was made constant and, during the first month thereafter, females were older at first parturition than in previous months.

Type
Research Article
Information
Journal of Hygiene , Volume 57 , Issue 2 , June 1959 , pp. 193 - 197
Copyright
Copyright © Cambridge University Press 1959

References

REFERENCES

Bruce, Hilda M.. & East, June (1956). Number and viability of young from pregnancies concurrent with lactation in the mouse. J. Endocrin. 14, 19.CrossRefGoogle ScholarPubMed
Snell, George D.. (ed.) (1941). Biology of the Laboratory Mouse, 497 pp. Philadelphia: The Blakiston Co.Google Scholar