Table 3.

Effect size (β), standard error (SE), lower (LCI) and upper (UCI) 95% confidence interval of explanatory variables for the analysis of body size in a Eurasian beaver population in south-eastern Norway between 1998 and 2018 (n_young = 333, n_adults = 829).

Variables	Estimate	SE	LCI	UCI	R2marginal	R2conditional
Young (kits and yearlings)
Intercept	40.410	0.880	38.686	42.134	0.78	0.84
Captures	0.018	0.199	− 0.372	0.408
Years of monitoring	0.046	0.065	− 0.082	0.173
Sex (male)	0.058	0.288	− 0.507	0.622
Age	19.164	0.612	17.965	20.364
Season (summer)	6.274	0.715	4.874	7.675
Season (autumn)	10.511	0.801	8.940	12.082
Log (territory size)	− 1.528	0.475	− 2.459	− 0.598
Family group size	− 0.103	0.141	− 0.379	0.174
Adults (2 + years)
Intercept	78.953	0.374	78.220	79.686	0.35	0.56
Captures	− 0.018	0.051	− 0.117	0.081
Years of monitoring	0.023	0.036	− 0.048	0.094
Carried telemetry device (yes)	− 0.572	0.413	− 1.382	0.238
Sex (male)	− 0.110	0.246	− 0.592	0.371
Age	0.826	0.095	0.641	1.012
Age2	− 0.108	0.011	− 0.131	− 0.086
Social status (subordinate)	0.072	0.319	− 0.553	0.698
Origin (resident)	0.105	0.263	− 0.411	0.620
Season (summer)	1.379	0.257	0.876	1.883
Season (autumn)	2.077	0.319	1.451	2.703
Log (territory size)	− 0.039	0.135	− 0.304	0.225
Family group size	− 0.081	0.076	− 0.230	0.068
Captures: social status (subordinate)	0.023	0.063	− 0.100	0.146
Social status (subordinate): age	0.232	0.128	− 0.019	0.483

Beaver ID, capture year and river were included as random effects. We performed model averaging of best models (ΔAICc < 4) to estimate the effect size of each variable. Informative parameters are given in bold.

Reference level of sex: female.

Reference level of season: spring.

Reference level of carried telemetry device: no.

Reference level of social status: dominant.

Reference level of origin: immigrant.