Factors Affecting Respiration Rates of Winter Flounder (Pseudopleuronectes americanus)

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Abstract
In one series of experiments, average rates of oxygen consumed by winter flounder at 10 C were 35 and 55 mg O2/kg of body weight per hour at 3.5 and 8.6 mg dissolved oxygen (DO)/liter, respectively. At 20 C the average rates of oxygen uptake were 70 at 3.2 mg DO/liter and 97 at 6.3 mg DO/liter. Oxygen consumption rates were significantly greater (P <.05) at 20 C than at 10 C. In two of the three experiments, rates of oxygen uptake were significantly lower (P <.05) among groups of winter flounder maintained at the reduced dissolved oxygen concentrations for 15–23 hr. No dissolved oxygen–temperature interactions were apparent.Results of a second series of experiments indicated respiration rates of winter flounder increased linearly with weight along regression lines having slopes of 0.792 (20 C — 6.9 mg DO/liter), 0.785 (20 C — 4.3 mg DO/liter), 0.720 (10 C — 8.7 mg DO/liter), and 0.746 (10 C — 4.3 mg DO/liter).

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