Effect of melatonin on circadian rhythm, locomotor activity and body temperature in the intact house sparrow, Japanese quail and owl

Noboru Murakami*, Takanori Kawano, Keiko Nakahara, Tetsuo Nasu, Kunio Shiota

*この研究の対応する著者

研究成果: Article査読

64 被引用数 (Scopus)

抄録

We compared the effect of melatonin on circadian rhythm, body temperature, and locomotion in the intact house sparrow, Japanese quail and owl. Daily treatment with melatonin at a fixed time did not entrain the free-running rhythm of locomotor activity in the house sparrow and the disrupted rhythm in Japanese quail under constant dim light. However, melatonin clearly inhibited movement for several hours after treatment. The duration of resting after injection of melatonin was dose-dependent. Body temperature was significantly decreased after melatonin treatment, the effect being more potent during the active phase than in the resting phase. Although this effect of melatonin on body temperature was also dose-dependent, the magnitude of the decrease in body temperature after injection of melatonin was greater in the house sparrow than in the Japanese quail. On the other hand, melatonin induced a further large decrease of body temperature in a nocturnal bird, the owl, whose pineal gland is degenerate. The decrease of body temperature was larger in the active phase than in the resting phase, and melatonin did not prevent movement in spite of the decrease in body temperature. These results suggest that the effects of melatonin on circadian rhythm, locomotor activity and body temperature differ among avian species, and that these mechanisms may not be linked to each other.

本文言語English
ページ(範囲)220-224
ページ数5
ジャーナルBrain Research
889
1-2
DOI
出版ステータスPublished - 2001 1月 19
外部発表はい

ASJC Scopus subject areas

  • 神経科学(全般)

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