Competitive and Territorial Fighting: Two Types of Offense in the Rat

Table 1. Competitive Fighting as a Function of Strain, Hormone Status, and Opponent's Sex

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		Sex of the Opponent
		Female Opponent†				Male Opponent†
		Bite	Bite & Kick	OSP‡	Attack§	Bite	Bite & Kick	OSP‡	Attack§
DA strain
	Normal female	1.06	1.08	0.66	2.14	0.86	0.72	0.80	1.58
	Normal male	0.41	0.50	0.58	0.91	0.31	0.36	0.58	0.67
	Ovariectomized female	0.58	0.50	0.34	1.08	0.28	0.48	0.33	0.76
	Castrated male	0.36	0.33	0.11	0.69	0.30	0.16	0.25	0.46
Fischer strain
	Tube-tied female	0.02	0.05	0.03	0.07	0.00	0.00	0.08	0.00
	Vasectomized male	0.02	0.06	0.09	0.08	0.05	0.03	0.17	0.08
	Normal female	0.11	0.05	0.22	0.16	0.02	0.03	0.03	0.05
	Normal male	0.05	0.14	0.02	0.99	0.08	0.05	0.13	0.13

Notes: All data are frequency of motor patterns per 20-min test.
† Opponents were hormonally intact except in the case of the opponents of the normal Fischer females and males. Their opponents were ovariectomized or castrated DA rats.
‡ OSP = offensive sideways posture
§ Attack was calculated as the sum of bite and bite-and-kick.