Flight Behaviour and Thyroid Hormone Regulation in Homing Pigeons(COMMUNICATION)(Endocrinology)

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概要

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• Homing pigeons which were not given flight training for 3 months prior to the experiment, were flown the same distance of 48 km from the usual release site as reported in our earlier studies using pigeons which were in regular training. In these pigeons the flight lasted 90-160 min instead of the usual 60-80 min taken by pigeons which had regular training. This flight produced a more than two-fold increase in plasma levels of reverse triiodothyronine (rT_3), concomitant with reductions in thyroxine (T_4) and triiodothyronine (T_3) levels and also in T_3/T_4 ratio. The increase in plasma levels of rT_3 and the concomitant decrease in levels of T_4 and T_3 with no change in plasma osmolality, suggest inhibition of T_4 secretion and 5'-monodeiodination, and conversion of T_4 to rT_3. The conversion of T_4 to rT_3, the inactive form of T_3, represents a mechanism of autoregulation of thyroid hormone function during strenuous and extended flight.

• 社団法人日本動物学会の論文
• 1992-06-15

著者

• John T.

  Department Of Zoology University Of Guelph

• GEORGE JOHN

  Department of Zoology, University of Guelph

• George John

  Department Of Zoology University Of Guelph

• John T.Mathew

  Department of Zoology, University of Guelph

関連論文

• Flight Behaviour and Thyroid Hormone Regulation in Homing Pigeons(COMMUNICATION)(Endocrinology)

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