Abstract

Growth rate and growth efficiency of juvenile maomao are related to temperature. I grew isolated fish at six temperature regimes (constant: 23.4, 26.4, 29.4, 32.4 C; daily cyclic: 23.4–29.4 C, 26.4–32.4 C) and at three food rations. Growth rates (wet weight) of fish fed ad libitum were greatest at the two highest constant temperatures which are near the speciesˈ preferred temperature of 30.1 C. At two lower rations fastest growth occurred at 26.4 C. Growth rates in cyclic temperatures were not significantly different from those at constant temperatures equivalent to the mean temperature of the cycle. Maomao fed limited rations at cyclic temperatures which bracketed the preferred temperature grew at rates near the maximum for limited rations, indicating little, if any, energy penalty for living at cyclic temperatures.

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