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Comparative physiological study on environmental temperature effect influencing development of thermoregulatory competence in birds.

环境温度影响鸟类体温调节能力发育的比较生理学研究。

基本信息

批准号：
15560352
负责人：
TAZAWA Hiroshi
金额：
$ 2.3万
依托单位：
Muroran Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

1.Development of respiratory sinus arrhythmia and heart rate circadian rhythms in chickens.Simultaneous measurements of respiratory activities and instantaneous heart rate (IHR) in externally pipped (EP) embryos which switch gas exchanger from the chorioallantois to the lung and also in newly hatched chicks evidenced development of respiratory sinus arrhythmia in chickens. In addition, long-term measurement of IHR during a week post-hatch elucidated development of heart rate (HR) circadian rhythms in chickens. In ducks and emu, HR circadian rhythms were not evident as compared with chickens and their diurnal and nocturnal HR variations seemed to be caused by feeding or daily activities.2.Development of heart rate variability and responses to altered ambient oxygen in chicken embryos.Simultaneous measurements of embryonic HR variability both in broiler and white leghorn chickens and power spectrum analyses evidenced that development of cholinergic chronotropic control was not different between both strains. In addition, HR responses to altered ambient oxygen (hypoxia and hyperoxia) were investigated in young pre-pipped, pre-internally pipped (IP), IP and EP embryos and found to be different between pre-pipped and pipped embryos.3.Development of endothermic heart rate response in chickens, ducks and emu.In chickens, it was evidenced that sequence of exposure of hatchlings to altered ambient temperatures did not affect the endothermic HR response and brooding temperatures did not affect early development of endothermic HR response. The endothermic HR response to alteration of 10℃ in ambient temperature appeared in a day post-hatch in broiler chickens, soon after hatching in ducks and during external pipping period in emu. In addition, it was found that development of endothermic HR response was different between broiler and white leghorn chickens, which might be due to genetic selection of broiler chickens which grew fast.

1.鸡呼吸性窦性心律失常和心率昼夜节律的发生。同时测量将气体交换器从尿囊绒毛膜切换到肺部的外去孔（EP）胚胎以及新孵出的雏鸡的呼吸活动和瞬时心率（IHR），证明鸡发生了呼吸性窦性心律失常。此外，孵化后一周内对 IHR 的长期测量阐明了鸡的心率 (HR) 昼夜节律的发展。与鸡相比，鸭和鸸鹋的心率昼夜节律并不明显，其昼夜心率变化似乎是由喂养或日常活动引起的。2.鸡胚胎中心率变异性的发展和对环境氧变化的反应。肉鸡和白来航鸡胚胎心率变异性的同时测量和功率谱分析证明两种菌株之间胆碱能变时控制的发展没有差异。此外，在幼龄预去皮胚胎、预内去皮胚胎（IP）、IP 和 EP 胚胎中研究了对环境氧变化（缺氧和高氧）的 HR 反应，发现预去皮胚胎和去皮胚胎之间存在差异。 3. 鸡、鸭和鸸鹋吸热心率反应的发展。在鸡中，有证据表明，幼体暴露于改变的环境温度的顺序并不影响吸热HR反应和育雏温度不影响吸热HR反应的早期发展。对环境温度变化10℃的吸热HR反应出现在肉鸡孵化后一天、鸭子孵化后不久以及鸸鹋的体外去皮期间。此外，还发现肉鸡和白来航鸡吸热HR反应的发展存在差异，这可能是由于肉鸡生长速度快的遗传选择所致。

项目成果

期刊论文数量（88）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Development of cholinergic chronotropic control in chick (Gallus gallus domesticus) embryos

DOI：
10.1016/s1095-6433(03)00271-x
发表时间：
2004-01-01
期刊：
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY
影响因子：
2.3
作者：
Chiba, Y;Fukuoka, S;Tazawa, H
通讯作者：
Tazawa, H

Maturation of homeothermic response of heart rate to altered ambient temperature in developing chick hatchlings.

发育中的雏鸡的心率对环境温度变化的恒温反应的成熟。