Fig. 1

The main effect of Test Number on Zone Ratio score. During the one-week pre-pairing and one-week post-pairing tests, females spent more time in proximity to their fathers (more negative scores indicate a greater preference for the father over the partner); however, at six-months post-pairing, females spent slightly more time in proximity to their partners (more positive scores indicate a greater preference for the partner over the father). This preference for the partner over the father was significantly different when comparing the one-week pre-pairing results to the six-months post-pairing results. However, preference for the father over the partner was not statistically significantly different between the one-week post-pairing and six-month post-pairing time points, representing a slight shift in preference for the partner one-week post-pairing, despite no statistically significant difference between Zone Ratio scores for the one-week pre- and post- pairing tests. Points on the graph are colored based on subject identity. Significant differences for pairwise comparisons between tests indicated as: * < 0.05; ** < 0.01; *** < 0.001.