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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

Authors
Journal
Brain Research Bulletin
0361-9230
Publisher
Elsevier
Publication Date
Volume
4
Issue
3
Identifiers
DOI: 10.1016/s0361-9230(79)80011-8
Keywords
  • Olfactory Bulbs
  • Photoperiodism
  • Thyrotropic Activity
  • Gonadotropic Activity

Abstract

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 increased 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.

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