Effects of stress on defensive aggression and dominance in a water competition test
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Water-deprived rats in a pair competing for a single source of water quickly establish a firm relationship during which one rat drinks consistently more (dominant) than the other (submissive) animal. This relationship is formed during the first competition and is very stable during subsequent tests. Exposure of dominant rats to a severe (18 hrs immobilization), but not a mild (2 hrs immobilization), stressor reduced markedly aggressive behavior and inverted transiently the dominant submissive relationship of the pairs. Exposure of submissive rats to the severe stressor resulted in only minor reductions of aggressive behavior in these animals. Prestress anxiety predicted stress effects in the dominant animals in that high-anxious animals lost more dominant behavior and weight during stress as compared with low-anxious rats. Thus, severe stress can transiently reduce dominant but not submissive behavior during water competition and high-anxious rats are more prone to lose their aggressive behavior.
KeywordsAggressive Behavior Severe Stressor Restraint Stress Inescapable Shock Competitive Behavior
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- Benus, R.F., Bohus, B., Koolhaas, J.M., and van Oortmerssen, G.A. (1990). Behavioral strategies of aggressive and non-aggressive male mice in response to inescapable shock.Behavioral Brain Sciences, 21, 127–141.Google Scholar
- Drew, D.R. and Dickey, G.L. (1977). Observational and competitive measures of dominance in rats.The Psychological Record, 2, 331–338.Google Scholar
- Gray, J.A. (1987).The psychology of fear and stress. Cambridge University Press, Cambridge.Google Scholar
- Raab, A., Dantzer, R., Michaud, B., Mormede, P., Taghzouti, K., Simon, H., and Le Moal, M. (1986). Behavioral physiological and immunological consequences of social status and aggression in chronically coexisting resident-intruder dyads of male rats.Physiology and Behavior, 36, 223–228.PubMedCrossRefGoogle Scholar
- Rapaport, P.M. and Maier, S.F. (1987). Inescapable shock and food-competition dominance in rats.Animal Learning and Behavior, 6, 160–165.Google Scholar
- Weiss, J.M., Goodman, P.A., Losito, B.G., Corrigan, S., Charry, J.M., and Bailey, W.H. (1981). Behavioral depression produced by an uncontrollable stressor: Relationship to norepinephrine, dopamine, and serotonin levels in various regions of rat brain.Brain Research Reviews, 3, 167–205.CrossRefGoogle Scholar
- Williams, J.L. (1982). Influence of shock controllability by dominant rats on subsequent attack and defensive behaviors toward colony intruders.Animal Learning Behavior, 10, 305–313.Google Scholar
- Williams, J.L. and Lierle, D.M. (1986). Effects of stress controllability, immunization, and therapy on the subsequent defeat of colony intruders.Animal Learning Behavior, 14, 305–314.Google Scholar
- Williams, J.L. (1987). Effects of shock controllability on alpha male aggression and defense, defeat of intruders, and defensive burying.The Psychological Record, 37, 369–380.Google Scholar