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Post‐exercise metabolic rate in Atlantic cod and its dependence upon the method of exhaustion
Author(s) -
Reidy S. P.,
Nelson J. A.,
Tang Y.,
Kerr S. R.
Publication year - 1995
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1995.tb01907.x
Subject(s) - anaerobic exercise , gadus , biology , atlantic cod , fish <actinopterygii> , zoology , vo2 max , medicine , endocrinology , physiology , fishery , heart rate , blood pressure
This study tests whether or not post‐exercise oxygen consumption rates ( M o 2 ) in fish are dependent upon how exhaustion is induced. A group of eight Atlantic cod ( Gadus morhua ) were each exercised using (1) a critical swimming speed ( U crit ) protocol, (2) an exercise protocol designed to measure anaerobic capacity of fish ( U burst ), and (3) a protocol in which the fish were chased to exhaustion manually. M o 2 was measured for a 2‐h period following exhaustion induced by all three exercise regimes ( U crit , U burst and chase). Post‐exercise M o 2 following exhaustion from the U burst and chase protocols were significantly higher than post‐exercise M o 2 following the U crit protocol. Each fish during the U crit protocol exhibited maximal M o 2 during exercise rather than during recovery, yet 75% of the fish during U brust recovery and 100% during chase recovery exhibited M o 2 higher than that measured during U crit exercise. These results, as well as the large interindividual variations in M o 2 among the eight fish, show that post‐exhaustion M o 2 is specific to the exercise regime employed, thus, investigators must exercise caution when combining results from different exercise protocols and/or individuals.