Hourly fluctuations in the blood levels of melatonin, prolactin, luteinizing hormone, follicle-stimulating hormone, testosterone, tri-iodothyronine, thyroxine and cortisol in rams under artificial photoperiods, and the effects of cranial sympathectomy.
D000818:Animals; D002940:Circadian Rhythm; D006065:Gonadotropins, Pituitary / Q000097:blood; D006728:Hormones / Q000097:blood*; D006854:Hydrocortisone / Q000097:blood; D008027:Light; D008297:Male; D008550:Melatonin / Q000097:blood; D010507:Periodicity; D010870:Pineal Gland / Q000502:physiology*; D012756:Sheep; D013739:Testosterone / Q000097:blood; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
D006065:Gonadotropins, Pituitary; D006728:Hormones; D014284:Triiodothyronine; D013739:Testosterone; D008550:Melatonin; D013974:Thyroxine; D006854:Hydrocortisone