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Effect of repeated exercise fatigue on the swimming performance of juvenile rock carp (Procypris rabaudi,Tchang) |
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| Authors: | Ying-ping Huang Ali Haris Malik Zhi-ying Tu David Johnson Wei-Ming Li Xi Yuan |
| Institution: | 1. College of Hydraulic & Environmental Engineering, China Three Gorges University, Hubei Yichang, China
Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, China;2. College of Hydraulic & Environmental Engineering, China Three Gorges University, Hubei Yichang, China;3. Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, China;4. Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, China School of Natural Sciences and Mathematics, Ferrum College, Ferrum, VA, USA |
| Abstract: | The swimming performance of juvenile rock carp (Procypris rabaudi, Tchang) subjected to repeated fatigue exercise was studied using a flume-type respirometer at 20°C. The critical swimming speed (Ucrit) and oxygen consumption rate (MO2) of juvenile rock carp were measured during two successive stepped velocity tests, following a 60 min rest interval. Ucrit of rock carp was giving a recovery ratio (Rr) of 92.64%, and exertion exercise decreases Ucrit. When MO2 was plotted as a linear function of U, the slope for trial 1 was 1.06 and 1.50 for trial 2, indicating a decreasing in swimming efficiency. The maximum metabolic rate (MMR) increased from 17.06 ± 1.14 mmol O2/(kg·hr) to 19.14 ± 1.23 mmol O2/(kg·hr), and the exercise post oxygen consumption rate (EPOC) increased from 9.00 to 9.65 mmol O2/kg. Repeated fatiguing exercise increased both the aerobic and anaerobic cost of reaching Ucrit, but anaerobic metabolism accounted for a larger proportion in the trial 2. The data investigation on the swimming performance and the physiological response to fatigue provide important design criteria for fishways. |
| Keywords: | critical swimming speed excess post-exercise oxygen consumption (EPOC) oxygen consumption Procypris rabaudi repeat fatiguing exercise |