photoperiodicity
Saunders Veterinary Dictionary:
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photoperiodicity
The rhythm of certain biological phenomena such as hibernation and reproductive activity which are determined by the regularly recurring changes in light and dark caused by the annual passage of the earth about the sun.
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Saunders Veterinary Dictionary
Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved.
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