Table 2.
Effect size (β), standard error (SE), lower (LCI) and upper (UCI) 95% confidence interval of explanatory variables for the analysis of body mass in a Eurasian beaver population in south-eastern Norway between 1998 and 2018 (nyoung = 340, nadults = 916).
| Variables | Estimate | SE | LCI | UCI | R2marginal | R2conditional |
|---|---|---|---|---|---|---|
| Young (kits and yearlings) | ||||||
| Intercept | 4.673 | 0.256 | 4.172 | 5.174 | 0.87 | 0.93 |
| Captures | 0.078 | 0.109 | − 0.135 | 0.291 | ||
| Years of monitoring | 0.011 | 0.020 | − 0.028 | 0.050 | ||
| Sex (male) | − 0.010 | 0.076 | − 0.160 | 0.140 | ||
| Age | 7.997 | 0.201 | 7.603 | 8.391 | ||
| Season (summer) | 3.765 | 0.204 | 3.364 | 4.166 | ||
| Season (autumn) | 5.570 | 0.236 | 5.108 | 6.033 | ||
| Log (territory size) | − 0.453 | 0.143 | − 0.734 | − 0.172 | ||
| Family group size | − 0.087 | 0.049 | − 0.183 | 0.010 | ||
| Adults (2 + years) | ||||||
| Intercept | 21.983 | 0.283 | 21.428 | 22.538 | 0.48 | 0.78 |
| Captures | − 0.148 | 0.044 | − 0.235 | − 0.062 | ||
| Years of monitoring | − 0.012 | 0.028 | − 0.067 | 0.043 | ||
| Carried telemetry device (yes) | 0.003 | 0.065 | − 0.126 | 0.131 | ||
| Sex (male) | − 1.084 | 0.253 | − 1.581 | − 0.587 | ||
| Age | 0.684 | 0.047 | 0.591 | 0.777 | ||
| Age2 | − 0.088 | 0.007 | − 0.102 | − 0.075 | ||
| Social status (subordinate) | − 0.539 | 0.179 | − 0.889 | − 0.189 | ||
| Origin (resident) | 0.001 | 0.096 | − 0.186 | 0.188 | ||
| Season (summer) | 0.939 | 0.205 | 0.537 | 1.341 | ||
| Season (autumn) | 1.265 | 0.237 | 0.801 | 1.730 | ||
| Log (territory size) | − 0.006 | 0.058 | − 0.120 | 0.108 | ||
| Family group size | − 0.059 | 0.042 | − 0.141 | 0.023 | ||
| Captures: years of monitoring | 0.010 | 0.006 | − 0.002 | 0.022 | ||
| Captures: social status (subordinate) | 0.137 | 0.042 | 0.055 | 0.219 | ||
| Captures: age | − 0.016 | 0.009 | − 0.033 | 0.001 | ||
| Season (summer): sex (male) | 0.462 | 0.268 | − 0.064 | 0.987 | ||
| Season (autumn): sex (male) | 0.703 | 0.317 | 0.082 | 1.324 | ||
| Social status (subordinate): age | 0.010 | 0.035 | − 0.059 | 0.079 | ||
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.