温度对日本鳗鲡的呼吸和心血管功能的影响

TEMPERATURE EFFECTS ON THE FUNCTIONS OF RESPIRATORY AND CARDIOVASCULAR SYSTEMS OF JAPANESE EEL, ANGUILLA JAPONICA

日本鳗鲡的呼吸和心血管系统的功能活动的适宜温度在15～30℃。与25℃相比,在10℃水温,鳗鱼呼吸功能减弱并呈间歇式呼吸,心率和血压也明显下降,鳃盖运动频率,心率和血压分别为15.14±2.48次/分,2.49±0.30kPa;而在25℃,相应值分别为46.71±3.44次/分,56.71±9.77次/分和3.18±0.47kPa.在35℃水温,鳗鱼的鳃盖运动频率、心率和血压达到最大值,相应的值分别为61.63±4.93次/分,102.10±8.48次/分和3.78±0.40kPa.35℃以上水温,鳗鱼常表现出严重的呼吸和心血管功能异常,水温高于38℃,这些功能性的变化在大多数情况下都不能逆转。

For the functions of respiratory and cardiovascuhr system of Japanese eel, Angtuilla japonica, the optimal temperature was in the range of 15±30℃. At 10℃, the eels showed weak respiratory function and the model of intermittent respiration. The heart rate and blood pressure were also dropped cvidently as compared to those at 25℃. The frequency of opcreular movements and the heartrates were 15.14±2.48 and 16.67±3.44counts/min, the blood pressure was 2.19±0.30 kPa. while at 25℃ these relevent values were 46.71±5.43, 56.71±9.77 counts/min and 3.18±0.47 kPa. At 35℃, the frequency of opercular movements, heart rates and the blood pressure reached their maximum. The values were 61.63±4.93, 102.10±8.48 counts/min and 3.78±0.40 kPa. At temperature above 35℃, ecls often showed serious disturbance of the functions of respiratoly and cardiovascular systems. In most cases, the functional changes were irreversible at temperature above 38℃.