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Fig. 2. Relationship between body mass and desiccation resistance (survival time) in 20 Drosophila species. Open symbols, males; filled symbols, females. Circles, mesic species; triangles, desert species. Regression equations were: males, T=5.70+8.71M; r2=0.20, P=0.058; females, T=4.34+8.43M; r2=0.27, P=0.020, where T is survival time and M is body mass.