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2003:
Pliusnina I Z; Trut L N; Karpushkeeva N I; Alekhina T A; Os'kina I N
[Behavioral and physiological characteristics of nonagouti mutation in gray rats during selection for aggressiveness]
Zhurnal vysshei nervnoi deiatelnosti imeni I P Pavlova 2003;
53(
6):.
The goal of this work was to find out to which degree the black coat color mutation nonagouti that appears in wild Norway rat in the course of breeding for the maintenance and enhancement of aggressiveness towards a human affects selected and other behavioral traits as well as stress reactivity and brain neurochemistry. Nonagouti rats displayed increased emotionality in the open-field and forced-swimming tests as compared to agouti animals, whereas there were no differences in anxiety estimated in the elevated plus-maze. Neither were there any differences in glucocorticoid reactions to a combined stressful procedure such as forced swimming. The dopamine content in the frontal cortex and striatum and noradrenaline content in the frontal cortex were increased in black rats as compared to gray rats. The result suggest that the nonagouti mutation in gray aggressive rats enhances the effects of selection for aggressiveness on some behavioral traits and brain catecholamine level.
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