Under standard nutritional conditions sturkopf^35.7 mutants are viable and show no gross fertility defects, although progeny from females show a slight decrease in hatching rate, as compared to wild-type controls.

sturkopf^35.7 adults show no differences in food intake whether at 4[o]C (which blocks food consumption), after starvation or under standard nutritional conditions, as compare to controls. Under basal conditions, these mutants show decreased lifespan only in males and show no differences in activity, as compared to controls. Mutant adults show shorter survival to starvation in both sexes, and both decreased activity and longer survival to desiccation in both sexes, despite of unchanged body water content, as compared to controls. Regardless of sturkopf^35.7 females being reared under standard nutrition, under low sugar diet or low protein diet, there are no differences in eggs laid, nor in their hatch rate, as compared to controls.

Under standard nutritional conditions sturkopf^35.7 larvae do not show defects in size or developmental time to pupariation, and their fat body lipid droplets do not show any morphological difference, as compared to controls. However, on low-sugar and low-protein diets larvae are respectively smaller and larger than controls, which correlates with respectively longer and shorter times to pupariation, as compared to controls.