Table 2. The repeatabilities (R) of behavioural measures in juvenile pike (n = 34) within each experimental situation: (a) control (no risk), (b) competition (low risk), (c) predation (high risk).

	Behavioural measure	R	SE	95% CI	P
(a) control	Latency to attack prey	0.12	0.06	0.00 to 0.24	0.011
	Number of captured prey	0.19	0.08	0.05 to 0.35	0.001
	Number of unsuccessful attacks	0.10	0.09	0.00 to 0.32	0.094
	Swimming activity	0.07	0.05	0.00 to 0.09	0.086
(b) competition	Latency to attack prey	0.35	0.10	0.15 to 0.54	0.001
	Number of captured prey	0.44	0.13	0.18 to 0.68	0.001
	Number of unsuccessful attacks	0.00	0.10	0.00 to 0.32	0.660
	Swimming activity	0.07	0.07	0.00 to 0.23	0.192
(c) predation	Latency to attack prey	0.07	0.07	0.00 to 0.22	0.183
	Number of captured prey	0.21	0.13	0.03 to 0.53	0.026
	Number of unsuccessful attacks	0.00	0.29	0.00 to 0.85	0.788
	Swimming activity	0.08	0.07	0.00 to 0.25	0.138

Generalised linear mixed-effects and linear mixed-effects models (rptR package in R [33]) with fish identity fitted as random effect and the behavioural measure as dependent factor were used for calculating repeatabilities, standard errors, 95% confidence intervals (CIs) and P-values. Latency to prey attack and swimming activity were log-transformed to achieve normality.