title: Initial observations on pinealectomized ferrets kept for long periods in either daylight or artificial illumination.
mesh_terms: D000818:Animals; D001947:Breeding; D002335:Carnivora / Q000502:physiology*; D004971:Estrus; D005260:Female; D008027:Light; D008029:Lighting; D010870:Pineal Gland / Q000502:physiology* / Q000601:surgery; D011247:Pregnancy; D012621:Seasons; D013997:Time Factors