Natural population

Directional selection gradient

Stabilizing/Disruptive selection gradient



β

p

γ

p


TTL

0.014 ± 0.042

0.739

0.114 ± 0.072

0.311

FTG

0.003 ± 0.042

0.934

0.012 ± 0.070

0.937

Simulation 1
    
FTG

0.182 ± 0.040

< 0.001

0.074 ± 0.066

0.269

Simulation 2
    
FTG

0.054 ± 0.042

0.198

0.178 ± 0.070

0.012

 In Simulation 1 female size distribution was shifted towards larger values. In Simulation 2 the variation of male size distribution was increased. Pvalues in the table were calculated by the least squares analysis. But pvalues were also determined by logistic regression and the resulting statistically significant (p < 0.05) selection coefficients are given in bold.