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Table 2 The influence of contest experience on contest behaviours and its dependence on hormonal states

From: Winner and loser effects are modulated by hormonal states

   Behaving aggressively Winning contests
Variable df b ±SE LRχ 2 P b ±SE LRχ 2 P
Experience 2   43.56 <0.001*   17.70 <0.001*
Win1 1 1.06 ± 0.42 6.98 0.008* 0.52 ± 0.31 2.87 0.093
Lose1 1 -1.74 ± 0.57 10.13 0.002* -1.85 ± 0.34 6.49 0.011*
Time-decay 2   8.84 0.012*   1.66 0.437
1d2 1 -0.65 ± 0.47 2.02 0.156 0.22 ± 0.34 0.42 0.518
7d2 1 0.08 ± 0.51 0.03 0.868 0.42 ± 0.33 1.66 0.198
Exp×Time 4   5.55 0.236   7.08 0.132
Strain 4   5.35 0.253   12.69 0.013*
Pre-Cont F 1 0.13 ± 0.20 0.45 0.503 -0.06 ± 0.13 0.18 0.669
Exp×Pre-ContF 2   9.65 0.008*   1.03 0.598
Time×Pre-Cont F 2   4.63 0.099   1.95 0.378
Exp×Time×Pre-Cont F 4   13.85 0.008*   2.80 0.592
Pre-Cont T 1 0.43 ± 0.43 1.07 0.302 0.05 ± 0.34 0.02 0.880
Exp×Pre-Cont T 2   9.89 0.007*   1.73 0.421
Time×Pre-Cont T 2   3.33 0.190   5.02 0.081
Exp×Time×Pre-Cont T 4   11.32 0.023*   13.46 0.009*
Pre-Cont KT 1 1.41 ± 0.66 4.95 0.026* 1.59 ± 0.72 6.14 0.013*
Exp×Pre-Cont KT 2   10.60 0.005*   9.68 0.008*
Time×Pre-Cont KT 2   12.42 0.002*   5.76 0.056
Exp×Time×Pre-Cont KT 4   5.78 0.216   11.62 0.020*
Pre-Cont E2 1 0.03 ± 0.24 0.02 0.897 -0.05 ± 0.20 0.06 0.813
Exp×Pre-Cont E2 2   2.13 0.345   0.83 0.661
Time×Pre-Cont E2 2   2.87 0.239   2.35 0.309
Exp×Time×Pre-Cont E2 4   9.11 0.058   9.28 0.054
  1. Multiple logistic regression modelling the influence of contest experience on the probabilities of behaving aggressively and winning contests and the degree to which these influences depended on hormonal states. The focal individuals’ F, T, KT and E2 levels were correlated with each other, so, to avoid multicolinearity problems, each of the hormones (F, T, KT and E2) was tested separately. The first section of the table shows the models that tested the importance of contest experience, decay-time treatment and the interaction between them on contest behaviour, controlling for strain type. The second to the fifth sections of the table show the effects of pre-contest F, T, KT and E2, respectively, and their interactions with contest experience and time-decay treatments, with the variables in the first section included in the models. (N = 270, LRχ2: likelihood ratio χ2, *: P ≤ 0.05, Exp: Experience, Time: Time-decay, Cont: Contest).
  2. 1indicator variables, individuals with no recent experience form the baseline group.
  3. 2indicator variables, 0d decay time treatment is the baseline group.