Table 2.

Nonaggressive behaviors (analyzed as the proportion of time for each behavior over a 4-h observation period with scan sampling every 2 min), at each time point, were compared with the total duration of aggression (s)¹

Aggression (s)	Period	Behavior	Slope	SE	F (1, 8)	P-value
Total aggression	Introduction	Inactive	−3.144	0.334	86.766	<0.001
		Movement	−4.596	1.039	19.137	<0.001
		Ingestion	−3.931	0.512	57.915	<0.001
		Social	−3.708	1.182	9.666	0.002
		Exploration	−5.687	0.651	75.280	<0.001
	3 wk	Inactive	−10.565	2.003	27.575	<0.001
		Movement	−9.058	2.259	15.946	<0.001
		Ingestion	−8.572	2.055	17.253	<0.001
		Social	−7.717	2.404	10.240	0.002
		Exploration	−8.852	2.039	18.695	<0.001
	6 wk	Inactive	−9.014	2.583	12.026	0.001
		Movement	−5.631	2.778	4.070	0.045
		Ingestion	−6.585	2.641	6.657	0.011
		Social	−9.020	2.972	9.117	0.003
		Exploration	−8.182	2.683	9.178	0.003
	9 wk	Inactive	−12.381	3.588	−11.839	0.001
		Movement	−11.020	3.895	−7.969	0.005
		Ingestion	−9.940	3.619	−7.503	0.007
		Social	−8.195	3.735	−4.791	0.029
		Exploration	−10.085	3.696	−7.400	0.007

¹Aggression variables were log₁₀ + 1 transformed for normality. Pigs were observed immediately after introduction to a new social group and 3, 6, and 9 wk later.