Studies on fish feeding rhythms and their application

鱼类摄食节律的研究及其应用

基本信息

批准号：
07660259
负责人：
TABATA Mitsuo
金额：
$ 1.54万
依托单位：
Teikyo University of Science & Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07660259/
关键词：
Demand feeding daily rhythm Circadian rhythm Pineal organ Eye Melatonin Biological clock 摂餌リズム行動リズムマダイキンギョ成長

项目摘要

1. Fish can learn demand feeding by operant conditioning. We kept red sea bream, goldfish and masu salmon by demand feeding method. Feeding and locomoter activity rhythms were simultaneously recorded. As the results, (1) these species easily learned demand feeding both individually or in groups. We could keep them longer only by this method. (2) Demand feeding showed better growth rate than the regular way of restricted feeding, especially in goldfish. (3) Circadian rhythms of both feeding and locomotor activities were confirmed under constant conditions, suggesting the existence of biological clock in these species.2. Multiple oscillators are assumed to be involved in the fish circadian system of locomotor, feeding and physiological functions. Correlation between oscillators and functions, however, are still controversial. Location of biological clock was investigated from the study of melatonin, the time-keeping hormone. As the results, (1) we found that goldfish eye has the biological clock. (2) There were no positive data on biological clock in the pineal organ of masu salmon and European sea bass, and the eye of European sea bass. (3) Melatonin profile in the eye of European sea bass under light-dark cycle displayd reversal pattern compared to the other fish species. (4) Melatonin receptors in the brain of goldfish coupled with G-proten. Daily rhythms of these receptors were down regulated by the pineal melatonin.

1。鱼可以通过操作调节来学习需求进食。我们通过需求喂养方法保留了红海，金鱼和马苏鲑鱼。同时记录喂养和运动活性节奏。作为结果，（1）这些物种很容易学到的需求单独或分组喂养。我们只能通过这种方法使它们更长。（2）需求喂养比常规的限制喂养方式表现出更好的增长率，尤其是在金鱼中。（3）在恒定条件下证实了进食和运动活性的昼夜节律，表明这些物种中存在生物钟。2。假定多个振荡器参与了运动，喂养和生理功能的鱼类昼夜节律系统。但是，振荡器与功能之间的相关性仍然存在争议。从褪黑激素的研究研究中研究了生物钟的位置。结果，（1）我们发现金鱼眼具有生物钟。（2）在马苏鲑鱼和欧洲鲈鱼的松果体以及欧洲海鲈的眼睛中，没有关于生物钟的积极数据。（3）与其他鱼类相比，欧洲海鲈鱼眼中的褪黑激素曲线显示逆转模式。（4）金鱼大脑中的褪黑激素受体与G-proten结合。这些受体的每日节奏被松果褪黑激素调节。