TABLE I.

Subject Information including Age, Pairing Length, Number of Offspring Living with the Pair, and Oxytocin Levels in the Control Condition (Averaged from Both Samples)

Male ID	Age (years)	Pairing Length (years)	Number of Offspring in Cage	Oxytocin (pg/ml) in Control condition
29775	14.8	3.2	0	770.65 ± 21.44
31716	11.9	9.0	2	651.79 ± 51.38
32878	10.1	1.0	0	1540.71 (second sample not available)
34438	8.5	3.2	0	657.89 ± 62.19
34531	8.2	3.9	2	986.07 ± 56.15
36150	6.4	0.7	1	890.21 ± 32.22
36187	6.1	1.2	1	766.08 ± 51.68
38644	3.2	0.9	1	671.43 ± 186.55