Table 3.

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 initiated aggression (s)¹

Aggression (s)	Period	Behavior	Slope	SE	F (1, 8)	P-value
Total initiated aggression	Introduction	Inactive	−2.047	0.413	24.388	<0.001
		Movement	−3.027	1.283	5.517	0.019
		Ingestion	−2.648	0.628	17.653	<0.001
		Social	−2.725	1.451	3.499	0.063
		Exploration	−4.511	0.796	31.959	<0.001
	3 wk	Inactive	−11.059	2.483	19.559	<0.001
		Movement	−9.459	2.803	11.244	0.001
		Ingestion	−8.505	2.546	11.002	0.001
		Social	−9.105	2.989	9.189	0.003
		Exploration	−8.992	2.528	12.483	<0.001
	6 wk	Inactive	−9.443	3.282	8.087	0.005
		Movement	−6.155	3.548	2.954	0.087
		Ingestion	−7.195	3.355	4.493	0.035
		Social	−9.890	3.792	6.670	0.010
		Exploration	−9.051	3.406	6.894	0.009
	9 wk	Inactive	−11.419	4.013	8.027	0.005
		Movement	−12.188	4.359	7.759	0.006
		Ingestion	−8.713	4.045	4.597	0.033
		Social	−8.928	4.181	4.526	0.034
		Exploration	−10.018	4.132	5.825	0.017

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.