Table 1.

Behavioral fission data: Comparison of fission numbers between intergroup conflict and control periods

	Fission events*			Individual fissions†			Subgroup size‡		Proportion of adult leaves§
Events	n	Mean	SD	n	Mean	SD	Mean	SD	Mean	SD
Control, n = 23	65	2.826	2.145	312	1.079	0.974	10.043	3.268	0.697	0.329
Intergroup conflict, n = 23	25	1.089	1.276	91	0.365	0.694	10.304	3.096	0.257	0.279
Border patrol, n = 12	16	1.454	0.934	44	0.382	0.539	9.333	2.269	0.341	0.234
Intergroup encounter, n = 11	9	0.750	1.484	47	0.350	0.806	11.363	3.613	0.173	0.298

^*Adult individuals leaving the subgroup within at most 1 min were counted as having left during the same fission event.

^†Number of times each adult individual left the subgroup.

^‡Subgroup size at the start of each event.

^§The proportion of adult individuals that left the subgroup at least once to the total adult individuals present in the subgroup.