Table 1.
Behavior variable definitions.
Fig 1.
Females in single male groups were more likely to be in close (2m) proximity to males when they had a young infant.
Females in multi-male groups were more likely to be near dominant males than non-dominant males, but the proportion of point samples they were near males was similar regardless of whether they had young infants (p = 0.100).
Table 2.
Male-female dyads containing dominant silverbacks.
Fig 2.
Proportionally, females in multi-male groups increased their time near males they had previously spent little time near more than they increased time near males they previously preferred (p = 0.050).
Table 3.
All male-female dyads in multi-male groups.
Fig 3.
Females with young infants spent more time resting in contact with dominant males than females without young infants did.
Females in single male groups appeared to drive this result, though overall rates of resting in contact were higher in single male than in multi-male groups regardless of whether females had young infants.
Table 4.
Male-female dyads containing dominant silverbacks.
Fig 4.
Four representative example distributions of the proportion of point samples individual females in multi-male groups spent with each available silverback when they had young infants (black bars), and when they did not (grey bars).
Table 5.
Agreement of genetic paternity and male dominance rank with mother and infant social partner preference, operationalized as proportion of point samples spent in close proximity.
Table 6.
Summary of females’ behavioral changes when they had young infants (<1 year old) relative to when they did not.
Table 7.
Relative fit of models predicting females’ male social partner preferences when they had young infants.