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Table 2 Results of Cox proportional hazard analysis for survivorship of the populations at the four experimental temperatures. A) females; B) males. Population is nested within location (fixed effect).

From: Thermal plasticity in Drosophila melanogaster: A comparison of geographic populations

A) Females
   12°C   18°C 28°C 31.2°C
Source of variation df MS F MS F MS F MS F
Location 1 22.8 1.79 38.3 0.52 60.1 0.61 50.4 0.77
Population within location 3 12.7 1.23 73.9 7.4 *** 98.2 10 *** 65.2 6.5 ***
Residuals 479/491/491/489 10.3   9.98   9.8   10  
B) Males
Source of variation df MS F MS F MS F MS F
Location 1 0.4 0.01 24.8 0.34 71.1 0.59 56.3 0.66
Population within location 3 39 3.8 * 72.2 7.2 *** 119.7 12.4 *** 84.9 8.6 ***
Residuals 495/483/490/492 10.3   10   9.6   9.88  
  1. * P < 0.05; ***P < 0.001; df, degrees of freedom; MS, mean square; F, variance ratio.