Table 1.

Comparison of demographic information between males that show high levels of partner-directed aggression (High-aggressive; N = 10) and males that display low levels of partner-directed aggression (Low-aggressive; N = 10). Age, weight, length of time paired with pair-mate, and difference in age between pair-mates did not significantly differ between groups (P > 0.05). Findings based on a Welch’s T-test. All tests were two-tailed and the significance threshold was set at .05.

	Low-aggressive		High-aggressive
	Mean	SE	Mean	SE	df	t	P
Age	10.30	1.15	9.44	0.93	36.49	0.58	0.56
Weight	1.35	0.07	1.30	0.05	16.08	0.55	0.59
Pairing Length	3.75	0.88	2.23	0.50	30.26	1.50	0.14
Age Difference	3.64	1.33	4.21	0.81	14.84	−0.37	0.72