Statistical analyses
We assessed behavioural consistency (i.e., personality) by quantifying
repeatability coefficient for the nine traits using the package ‘rptR in
R v.4.0.2. (R Development Core Team, 2016; Stoffel et al., 2017).
Repeatability coefficient (R) calculated as ratio of group level
variance over the sum of group level and residual variance gives the
information about how particular trait correlates between replication in
one replication unit (in our case individual). The coefficient takes
value between 0 and 1. In rpt models we set the bootstrap number to 1000
in order to properly estimate confidence intervals for repeatability
coefficient.