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Table 6.

Guppy organ mass as a function of predation regime, drainage and sex(ANCOVAs with body mass as covariate)

Swimming motor mass
Heart mass
Gill mass
Effectd.f.FPFPFP
Predation 1,302 25.3 <0.000001 0.60 0.44 0.05 0.83 
Drainage 2,302 32.3 <0.000001 12.1 0.000009 56.6 <0.000001 
Sex 1,302 44.2 <0.000001 0.54 0.46 14.8 0.00015 
Predation × drainage 2,302 1.77 0.17 0.30 0.74 1.52 0.22 
Predation × sex 1,302 4.96 0.027 0.009 0.92 0.24 0.62 
Drainage × sex 2,302 3.24 0.041 0.66 0.52 13.1 0.0000036 
Predation × drainage × sex 2,302 10.6 0.000036 1.15 0.32 8.55 0.00024 
Swimming motor mass
Heart mass
Gill mass
Effectd.f.FPFPFP
Predation 1,302 25.3 <0.000001 0.60 0.44 0.05 0.83 
Drainage 2,302 32.3 <0.000001 12.1 0.000009 56.6 <0.000001 
Sex 1,302 44.2 <0.000001 0.54 0.46 14.8 0.00015 
Predation × drainage 2,302 1.77 0.17 0.30 0.74 1.52 0.22 
Predation × sex 1,302 4.96 0.027 0.009 0.92 0.24 0.62 
Drainage × sex 2,302 3.24 0.041 0.66 0.52 13.1 0.0000036 
Predation × drainage × sex 2,302 10.6 0.000036 1.15 0.32 8.55 0.00024 

N=315 for all variables.

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