Fundamental Study for Controlling Food Intake in Chickens

控制鸡食量的基础研究

基本信息

批准号：
61560312
负责人：
SONODA Tatsunobu
金额：
$ 1.22万
依托单位：
Miyazaki University, Faculty of Agriculture
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

项目摘要

In order to develop the technique controlling food intake, growth and production in chicken, it is necessary to explore the controlling mechanism, especially central integrative system. Single neuron activity (unit) of the lateral hypothalamic area, i.e., feeding center, was observed in male and female chickens using chronically implanted micro-wire technique. As the results, the meurons had some variations of activity consistent with the stages of feeding behavior.In male chickens at least two types of units were found; during a meal on type (E type) was activated tonically and the type (I type) was inactivated adversely. Furthermore, within E type of units some phasic activation appeared consistently with the start or the end of a bout, a sequence of pecking, or the start of apeck. This indicates that sensory informations form the beak, esophagus or eyes should activate this type of neurons. In order to accelerate feeding behavior it might be effective to strengthen these information … More s. Other physiological informations may activate this neurons, c.f., hunger or satiety substance, which we evidenced to exist in the blood of fasted chickens. Most of the units of I type were recorded with those of E type, indicating that these different types of neurons exist adjacently each other. Units of I types were activated phasically at the investigative behavior, Then this type of neurons should concern to the start of feeding behavior.In female chickens, only on etype of units was observed, which was activated not only tonically during eating, but also phaically at the investigative behavior. Our ethological study made clear that hens spent most of their active time for pecking or scratching the ground, that is, eating was intermingled with investigative movements. This supports that one type of neurons in females is concerned with different behaviros. Existence of sex differences in feeding behavior and neuron activity indicates possibility of sexual difference in controlling techniques of food intake. Less

为了开发控制鸡摄食、生长和生产的技术，有必要探索控制机制，特别是观察下丘脑外侧区（即摄食中枢）的中枢整合系统。使用长期植入微丝技术的雄性和雌性鸡的结果表明，meuron 的活性存在一些与进食行为阶段一致的变化。在雄性鸡中，在进食期间至少发现了两种类型的单元（E）。此外，在 E 型单位中，某些阶段性激活与回合的开始或结束、啄击序列或啄击的开始一致。表明来自喙、食道或眼睛的感觉信息应该激活这种类型的神经元，为了加速进食行为，加强这些信息可能会有效……更多 s. 其他生理信息可能会激活这种神经元，我们证明禁食鸡的血液中存在饥饿或饱腹感物质，大多数 I 型单元与 E 型单元一起记录，表明这些不同类型的神经元彼此相邻存在。在雌鸡中，仅观察到一种单位类型，该单位不仅在进食期间被激活，而且在调查行为时也被激活。我们的伦理研究清楚地表明，母鸡的大部分活动时间都在啄食或抓地，也就是说，进食与调查运动混合在一起，这支持了雌性的一种神经元与性别差异的存在有关。进食行为和神经元活动表明控制食物摄入技术方面存在性别差异的可能性较小。