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Table 2 Three-way ANOVA results with factors sex (male and female), strain (fighter and wild-type) and treatment (conspecific, mirror and control) and interaction between the factors. For the aggression score, only two levels of the factor treatment (conspecific and mirror were included as aggressive behaviours were absent during control trials. Values for the F-statistic and partial eta-squared (ηp2) are reported. * P < 0.05, ** P < 0.01, ***P < 0.001

From: Artificial selection for male winners in the Siamese fighting fish Betta splendens correlates with high female aggression

Variable   Strain Sex Treatment Strain*Sex Strain*Treatment Sex*Treatment Sex*Strain*Treatment
Aggressive displays
 Aggression score F
ηp2
F1,104 = 43.61***
0.30
F1,104 = 32.03***
0.24
F1,104 = 0.27
< 0.01
F1,104 = 3.22
0.03
F1,104 = 1.29
0.01
F1,104 = 1.39
0.01
F1,104 = 7.76**
0.07
Activity
 # Air breathing F
ηp2
F1,174 = 13.10***
0.07
F1,174 = 15.17***
0.08
F2,174 = 4.80**
0.05
F1,174 = 21.80***
0.11
F2,174 = 6.49**
0.07
F2,174 = 6.96**
0.07
F2,174 = 1.10
0.01
 Time near F
ηp2
F1,171 = 4.44*
0.03
F1,171 = 0.42
< 0.01
F2,171 = 3.55*
0.04
F1,171 = 1.84
0.01
F2,171 = 6.06**
0.07
F2,171 = 1.34
0.02
F2,171 = 2.42
0.03
 # Approach F
ηp2
F1,174 = 0.29
< 0.01
F1,174 = 1.44
0.01
F2,174 = 1.10
0.01
F1,174 = 8.22**
0.05
F2,174 = 6.11**
0.07
F2,174 = 0.09
< 0.01
F2,174 = 3.41*
0.04
 Distance travelled F
ηp2
F1,174 = 0.23
< 0.01
F1,174 = 5.38*
0.03
F2,174 = 0.67
0.01
F1,174 = 19.67***
0.10
F2,174 = 0.82
0.01
F2,174 = 3.22*
0.04
F2,174 = 1.45
0.02