ELECTROCARDIOGRAM OF A MARINE FISH, PAGRUS-MAJOR, EXPOSED TO RED TIDE PLANKTON, CHATTONELLA-MARINA
ELECTROCARDIOGRAM OF A MARINE FISH, PAGRUS-MAJOR, EXPOSED TO RED TIDE PLANKTON, CHATTONELLA-MARINA
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DOI：
10.1007/bf00391043
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发表时间：
1988-01-01
期刊：
影响因子：
2.4
通讯作者：
KUROKI, A
中科院分区：
文献类型：
--
作者：
ENDO, M;FOSCARINI, R;KUROKI, A
为了解引起赤潮的浮游生物--滨海查顿氏菌对鱼类的生理影响，对暴露于该种浮游生物中的大斑鱼的心电图进行了检测。心率减慢是T波和P波间期延长的结果。在溶氧减少的情况下，随着T波和P波间期的延长，心率也随之减慢。此外，暴露在红潮中的鱼在挣扎时心率也会下降。这种减少似乎是由迷走神经的强烈张力引起的。当暴露在高细胞浓度的边藻时，30分钟后心脏跳动的频率很低。非常低的心率预计会严重限制鳃的摄氧量，因为在这种情况下，心输出量可能非常低。
Examinations of the electrocardiogram of Pagrus major exposed to Chattonella marina, a planktonic organism causing red tide, were made to determine the physiological effects on fish. The heart rate decreased as a result of the extention in the interval between T and P waves. The decrease in heart rate with the extended intervals between T and P waves was also recognized in the condition of decreased dissolved oxygen. Also, the decrease in heart rate of the fish exposed to the red tide occurred while the fish was struggling. This reduction seems to be caused by the strong tension of the vagal nerve. Upon exposure to C. margina at high cell concentrations, the heart beat at a very low frequency after 30 min. The very low heart rate is expected to limit seriously the oxygen uptake by the gill, because the cardiac output is probably very low in this situation.