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Studies on the Metabolic Energy Saving Characteristics in Swamp Buffaloes.

沼泽水牛代谢节能特性的研究。

基本信息

批准号：
63044023
负责人：
CHIKAMUNE Tateki
金额：
$ 3.52万
依托单位：
University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63044023/
关键词：
Buffalo Cattle Heart Lung Heart rate Autonomic nervous tone 血漿量 ADH

项目摘要

Hearts and lungs were isolated from buffaloes, Holsteins and Brahman-Thai native crosses and was their anatomical characteristics compared. Even though the body weight was significantly heavier in Holsteins than in buffaloes or in Brahman-Thai native crosses, in terms of heart/body weight (%) and lung/body weight (%), buffaloes showed a significantly higher percentage than the Holsteins or the Brahman-Thai native crosses. No significant difference was found in the lung weight/heart weight ratio between buffaloes and Brahman-Thai native crosses, whereas the ratio was significantly lower in Holsteins than in either buffaloes or Brahman-Thai native crosses. The arch of the aorta could be anatomically characterized as being thick and large in buffaloes, thin but large in Holsteins and small in Brahman-Thai native crosses, respectively. Although the general shape of the heart was similar, muscular distribution in the heart was found to be considerably different among buffaloes, Holsteins an … More d Brahman-Thai native crosses. A constant balance in size between ventral and dosal papillary muscles was observed in spite of the difference in cardiac size.Intrinsic heart rate and autonomic nervous tone in swamp buffaloes were compared with those in cattle by the administration of autonomic blockers. Resting heart rate was significantly lower in buffaloes than in cattle (mean S. E. ; 49.5 1.2 vs 62.0 1.4 beats/min.). Furthermore, buffaloes showed a significantly lower intrinsic heart rate than cattle (56.2<plus-minus>1.8 vs 76.7<plus-minus>3.1 beats/min.). On the other hand, the net autonomic tone calculated from the changes in heart beats recorded before and after the administration of the blockers showed a parasympathetic-predominant type in both species, with the absolute value being smaller in buffaloes than in cattle (-9.0<plus-minus>7.3 vs -21.3<plus-minus>5.1%). On the basis of the results obtained, it is suggested that lower resting heart rate observed in buffaloes may be due to the lower intrinsic heart rate rather than to be inhibitoryeffect of the parasympathetic nervous Less

从水牛、荷斯坦牛和婆罗门-泰国本土杂交牛中分离出心脏和肺，并比较它们的解剖特征。尽管荷斯坦牛的体重显著高于水牛或婆罗门-泰国本地杂交牛，但就心脏/体重（%）和肺/体重（%）而言，水牛的百分比显著高于荷斯坦牛或婆罗门-泰国本地杂交牛。没有显着差异，发现在肺重量/心脏重量比之间的水牛和婆罗门，泰国本地杂交，而该比例显着低于荷斯坦牛比水牛或婆罗门，泰国本地杂交。主动脉弓在解剖学上的特点是水牛的主动脉弓厚而大，荷斯坦牛的主动脉弓薄而大，婆罗门-泰国本地杂交牛的主动脉弓小。虽然心脏的一般形状相似，但心脏中的肌肉分布在水牛、荷斯坦牛和 ...更多信息 d婆罗门-泰国土著杂交。腹侧和背侧乳头肌的大小之间的一个恒定的平衡，尽管在心脏size.Intrinsic心率和自主神经张力沼泽水牛的差异进行了比较，与牛的自主神经阻滞剂的管理。水牛的静息心率显著低于牛（平均S。e. ; 49.5 ± 1.2 vs 62.0 ± 1.4次/min）。此外，水牛表现出显着较低的内在心率比牛（56.2 - 1.8比76.7 - 3.1次/分钟）。<plus-minus><plus-minus>另一方面，根据给药阻断剂前后记录的心跳变化计算的净自主神经张力在两种物种中均显示副交感神经主导型，水牛的绝对值小于牛（-9.0 ± 7.3% vs-21.3 ± 5.1%）。<plus-minus><plus-minus>根据上述结果，我们认为水牛的静息心率较低可能是由于其固有心率较低，而不是副交感神经的作用。