Table 1.

Grooming, Hinde and Brown's indexes and proportion of female approaches from the total number of approaches within pairs.

group	grooming index	Hinde index	Brown's indexa	proportion of female approaches
1	0.92	−16.78	62.59 (76.90/59.29)	0.56
2	0.96	−20.84	60.91 (50.85/72.55)	0.54
3	0.71	−30.00	63.64 (63.64/b)	0.50
4	0.74	14.10	68.46c	0.74
5	0.99	8.97	65.91c	0.69
6	0.99	6.67	64.29 (100.00/58.33)	0.67
7	0.76	−4.17	64.71 (64.29/66.67)	0.63
Mean	0.87	−6.01	64.36	0.62

^aOverall index with separate values for the periods with and without dependent infants, respectively, in parenthesis.

^bInsufficient data to calculate the index.

^cGroups only observed in the absence of dependent infants.