Effect of repeated exercise fatigue on the swimming performance of juvenile rock carp (Procypris rabaudi, Tchang)

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 stepp...

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Bibliographic Details
Published in:Journal of applied ichthyology 2020-12, Vol.36 (6), p.811-816
Main Authors: Huang, Ying‐ping, Malik, Ali Haris, Tu, Zhi‐ying, Johnson, David, Li, Wei‐Ming, Yuan, Xi
Format: Article
Language:English
Subjects:
Carp
critical swimming speed
Design criteria
excess post‐exercise oxygen consumption (EPOC)
Exercise
Fatigue
Fish ladders
Fishways
Flumes
Freshwater fishes
Linear functions
Metabolic rate
Metabolism
Oxygen consumption
Physical training
Procypris rabaudi
repeat fatiguing exercise
Respirometers
Rocks
Swimming
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Summary: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.
ISSN:0175-8659
1439-0426
DOI:10.1111/jai.14110