Fatigue analysis of the jack mackerel Trachurus japonicus by electrocardiographic monitoring during prolonged swimming

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• 作者：Ruobing Cheng ; Mochammad Riyanto ; Takafumi Arimoto ; Kazutaka Yanase
• 关键词：Heart rate ; Fixed speed test ; Swimming endurance ; Recovery time ; Catch efficiency ; Cardiovascular system
• 刊名：Fisheries Science
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：83
• 期：1
• 页码：73-82
• 全文大小：
• 刊物主题：Fish & Wildlife Biology & Management; Freshwater & Marine Ecology; Food Science;
• 出版者：Springer Japan
• ISSN：1444-2906
• 卷排序：83

文摘

The effect of fatigue on swimming performance was examined by measuring the swimming endurance time and heart rate of the jack mackerel Trachurus japonicus [15.7 ± 0.8 cm fork length (FL), n = 15] during forced exercise in a flume tank at fixed swimming speeds of 4, 5 and 6 FL/s. Electrocardiographic (ECG) monitoring during the experimental process from control (0.8 FL/s) to exercise phase revealed a rapid cardiac response of T. japonicus to the elevation of swimming speed. The heart rate of T. japonicus significantly increased from the control level of 52.9 beats/min at a slow flow speed of 0.8 FL/s to 148.2 beats/min at 4 FL/s, 168.6 beats/min at 5 FL/s and 183.2 beats/min at 6 FL/s. During the fixed speed test, the heart rate of each individual fish was stabilized without any recognizable increase or decrease until the fish failed to swim because of fatigue. Fatigue analysis on endurance time demonstrated that prior swimming experience at prolonged speeds would impair the endurance performance during subsequent swimming exercise. Recovery time of the heart rate after the fish was fully exhausted by prolonged fast exercise increased with increasing swimming endurance time.