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Aerobic metabolic scope and swimming performance in juvenile cod, Gadus morhua L.
Author(s) -
Soofiani N. M.,
Priede I. G.
Publication year - 1985
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.1095-8649.1985.tb04249.x
Subject(s) - respirometer , gadus , respirometry , anaerobic exercise , oxygen , biology , juvenile , zoology , specific dynamic action , fishery , metabolic rate , atlantic cod , ecology , fish <actinopterygii> , respiration , anatomy , biochemistry , endocrinology , chemistry , physiology , organic chemistry
Juvenile cod (Gadus morhua) were made to swim in a tunnel respirometer to determine the oxygen consumption during swimming at different speeds. Results were compared with measurements of standard and active metabolic rates in static respirometers before and after intense exercise. The oxygen consumption at maximum sustainable swimming speed was considerably lower than the peak oxygen consumption following exhausting exercise. It is suggested that these fish have a poorly developed system of aerobic (red) locomotor muscles which do not normally make a major demand upon oxygen consumption. Apparent specific dynamic action following feeding and repayment of oxygen debt following anaerobic exercise can each give rise to greater rates of oxygen consumption. Following exhausting exercise there is a delay of about 1 h before oxygen consumption reaches a peak level some 40% higher than the peak level observed during sustained swimming.