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Decreased critical swimming speed and increased oxygen consumption ( ) was found for externally tagged Atlantic cod Gadus morhua swimming at a high speed of 0·9 body length (total length, L T ) s −1 . No difference was found in the standard metabolic rate, indicating that the higher for tagged cod was due to drag force rather than increased costs to keep buoyancy.
Steinhausen et al. (Wed,) studied this question.