家畜の耐暑性に関する研究(第14報) : 持続的高温処理の家鶏に及ぼす影響, 特に甲状腺機能を中心として

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The effects of continuous warming on the domestic fowl were studied in 28 cockerels. The cockerels in treatment were maintained at 28-30℃ of ambient temperature and the others at natural environmental temperature in the autumn-winter season. They were slaughtered in 120 days, 150 days and 240 days after hatching, and the thyroid parathyroid, thymus, adrenal, lever, pancreas, spleen and testis were weighed. Serum protein bound iodine was measured by BARKER'S method and also the histological examination was performed for thyroid. In comparing these results of two groups, following facts were estimated. 1) The thyroid activity had a tendency to decrease by continuous warming. 2) Maturation of testes was promoted in cockerels of 150 days old as the effect of warming. But in cockerels of 240 days old the testis weight was smaller than that of control. On the contrary the comb weight of treatment was larger. 3) No change was detected in other organs between two groups.
鹿児島大学の論文