The involvement of the olfactory bulbs in the regulation of gonadal and thyroidal activities of male red-winged blackbirds, exposed to short-day light regime.
Surgical removal of the olfactory bulbs (OB) was performed in mature male red-winged blackbirds, maintained under a short-day light regime. Bulbectomy caused hyperphagia, which was not accompanied by obesity. Bulbectomized (OBX) birds had incresaed thyroid follicular activity and had greater developed testes than sham-operated controls. In the adenohypophyses of the OB-removed birds there was an increase in the populations of 4 types of chromophils: alcianophils, PAS-positive basophils, orangeophils and PAS-positive acidophils. The possibility that the OB are involved in the photoperiodic regulation of the activity of the gonads and thyroids is discussed.
D000818:Animals; D001717:Birds; D001835:Body Weight; D002940:Circadian Rhythm; D004326:Drinking; D004435:Eating; D008297:Male; D009830:Olfactory Bulb / Q000502:physiology*; D009929:Organ Size; D010903:Pituitary Gland, Anterior / Q000033:anatomy & histology; D013737:Testis / Q000033:anatomy & histology; D013739:Testosterone / Q000097:blood*; D013961:Thyroid Gland / Q000033:anatomy & histology / Q000502:physiology*
D013739:Testosterone