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Table 4 Effects of sex, temperature (Temp) and relative humidity (RH) on the water loss rate (expressed per day) of three Ceratitis species estimated using general linear models

From: Physiological mechanisms of dehydration tolerance contribute to the invasion potential of Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) relative to its less widely distributed congeners

Dependent variable SS df F P
C. capitata     
 Intercept 0.102 1 0.594 0.443
 Sex 0.195 1 1.137 0.289
 Temp 3.766 1 21.933 <0.001
 RH 1.819 3 3.532 0.018
 Initial mass 0.378 1 2.203 0.141
 Sex × Temp 0.066 1 0.382 0.538
 Sex × RH 0.205 3 0.398 0.755
 Temp × RH 2.467 3 4.790 0.004
 Sex × Temp × RH 1.013 3 1.966 0.125
 Residuals 15.453 90   
C. cosyra     
 Intercept 5.080 1 22.170 <0.001
 Sex 0.455 1 1.987 0.162
 Temp 17.719 1 77.331 <0.001
 RH 8.016 3 11.661 <0.001
 Initial mass 0.756 1 3.299 0.073
 Sex × Temp 1.916 1 8.362 0.005
 Sex × RH 1.184 3 1.722 0.168
 Temp × RH 18.055 3 26.266 <0.001
 Sex × Temp × RH 1.5291 3 2.225 0.091
 Residuals 21.080 92   
C. rosa     
 Intercept 1.583 1 5.649 0.020
 Sex 0.336 1 1.200 0.276
 Temp 9.373 1 33.450 <0.001
 RH 6.551 3 7.793 <0.001
 Initial mass 2.948 1 10.520 0.002
 Sex × Temp 10.582 1 37.766 <0.001
 Sex × RH 0.230 3 0.274 0.844
 Temp × RH 17.383 3 20.678 <0.001
 Sex × Temp × RH 8.723 3 10.377 <0.001
 Residuals 25.499 91   
  1. Initial body mass was included as a covariate. Water loss rate was estimated by subtracting body water after stress for a period of 24-h from estimated initial body water (determined from initial body mass using the equations in Additional file 1: Table S1). Significant effects (P < 0.05) are indicated by bold type