2.4. Constructing bipartite networks

We constructed a bipartite network with weights for each colony from the behavioural data as defined above (figure 1a,b). The nodes represent ant individuals and behaviours, and the links represent the behaviours of individuals (figure 1b). Note that the behaviour data were separated by day (i.e. day 1, day 2 and day 3) to examine the consistency of patterns across different days (figure 1a). Connectance was defined as the ratio of the realized links to the possible links. The weights on the links in each day represented the number of executions of the behaviour (maximum 8 per day). The row and column of an adjacency matrix for a colony represented the individuals and behaviours (e.g. foraging on day 1, foraging on day 2, foraging on day 3, nursing on day 1), respectively (figure 1a). The detailed information about each network is shown in table 1.

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