Experimental studies on the duration of life. XII. Influence of temperature during the larval period and adult life on the duration of the life of the imago of Drosophila melanogaster
Alpatov, W.W.; Pearl, R.
The American Naturalist 63(684): 37-67
Summarizing, it has been shown in this paper that: 1. Drosophila reared at 18° C. is distinctly larger in a series of bodily dimensions than when reared at 28° C. Furthermore, the pigmentation is different in the two cases, notably with reference to the pigmentation of the seventh tergum. 2. Females were longer lived than males in all series of these experiments. The difference in duration of life between the two sexes diminishes as the temperature during imaginal life increases, in these experiments, regardless of the temperature during development. 3. As the temperature during imaginal life increases the duration of life decreases. The relationship between duration of life and temperature is exponential. 4. For the temperature range 18° to 28° used in these experiments the temperature coefficient for duration of life had, as average figures, the following values: Q10=2.07, μ=12717.3. 5. The relative or proportional influence of temperature upon body size and upon duration of life was, in these experiments, of the same order of magnitude. This fact furnishes confirmatory evidence to the theory that an important factor in determining the duration of life is the rate of energy expenditure during life.