Abstract
IT has long been known that additional light after dark will accelerate the breeding season of the ferret1. Like the ferret, the mink breeds in spring; but it differs in that its season is earlier and much shorter, and by the occurrence of delayed implantation for a period increasing with earliness of mating2. Artificial extension of day-length has been shown to shorten gestation2,3. Hansson2 has attempted to advance the start of the mink season by ultra-violet irradiation at dawn and dusk; he produced some increase of ovary and uterus weights, but did not hasten mating activity.
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References
Bissonnette, T. H., Proc. Roy. Soc., B, 110, 322 (1932).
Hansson, A., “Physiology of Reproduction in Mink” (Alb. Bonniers Boktryckeri, Stockholm, 1947).
Pearson, O. P., and Enders, R. K., J. Exp. Zool., 95, 21 (1944).
Hart, D. S., personal communications (1948–49); J. Exp. Biol. (in the press).
Bissonnette, T. H., and Wilson, E., Science, 89, 418 (1939).
Chang, M. C., personal communication (1948).
Allanson, M., Proc. Roy. Soc, B, 110, 295 (1932).
Hill, M., and Parkes, A. S., Proc. Roy. Soc, B, 115, 14 (1934).
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HAMMOND, J. Control by Light of Reproduction in Ferrets and Mink. Nature 167, 150–151 (1951). https://doi.org/10.1038/167150a0
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DOI: https://doi.org/10.1038/167150a0
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