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Effect of repeated exercise fatigue on the swimming performance of juvenile rock carp ( Procypris rabaudi , Tchang)
Author(s) -
Huang Yingping,
Malik Ali Haris,
Tu Zhiying,
Johnson David,
Li WeiMing,
Yuan Xi
Publication year - 2020
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/jai.14110
Subject(s) - respirometer , anaerobic exercise , biology , zoology , flume , juvenile , carp , respirometry , oxygen , fishery , ecology , anatomy , fish <actinopterygii> , respiration , chemistry , mathematics , physiology , biochemistry , flow (mathematics) , geometry , organic chemistry
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 ( U crit ) and oxygen consumption rate (MO 2 ) of juvenile rock carp were measured during two successive stepped velocity tests, following a 60 min rest interval. U crit of rock carp was giving a recovery ratio ( R r ) of 92.64%, and exertion exercise decreases U crit . When MO 2 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 O 2 /(kg·hr) to 19.14 ± 1.23 mmol O 2 /(kg·hr), and the exercise post oxygen consumption rate (EPOC) increased from 9.00 to 9.65 mmol O 2 /kg. Repeated fatiguing exercise increased both the aerobic and anaerobic cost of reaching U crit , 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.