Abstract
FOR several years we had very great difficulties in the breeding of rats in our laboratory. The troubles occurred from late autumn until early spring. The death-rate of new-born rats was high, and among the survivals ringtail1 was widespread.
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NJAA, L., UTNE, F. & BRÆKKAN, O. Effect of Relative Humidity on Rat Breeding and Ringtail. Nature 180, 290–291 (1957). https://doi.org/10.1038/180290a0
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DOI: https://doi.org/10.1038/180290a0
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