Abstract

1. 1. Metabolic rates of adult Drosophila melanogaster reared at three fixed temperatures (18, 25 and 29°C) were measured on small groups of adult flies while ramping temperature upward from 15 to 40°C. 2. 2. There were significant effects of developmental temperature on average metabolic rate at high and low temperatures, with compensatory increases in metabolic rate in flies reared at low temperature. 3. 3. Flies reared at lower temperature initiated escape behavior sooner than flies reared at high temperature. 4. 4. Measurement of physiological rates while ramping temperature can reveal more details of plastic responses to temperature than measurement at fixed temperatures.

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