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Influence of different terms of juvenile rat social isolation on the level of their intraspecies aggression of the age of sexual maturity

, : Influence of different terms of juvenile rat social isolation on the level of their intraspecies aggression of the age of sexual maturity. Zhurnal Vysshei Nervnoi Deyatel'nosti Imeni I P Pavlova 39(3): 488-492

Isolation of male outbred white rats from the same age rats at 12-30 and 15-30 days of postnatal life increases their aggressiveness in pubertal age and causes a change of aggressive reactions spectrum towards the decrease of attacks and increase of threats in relation to intruders. These changes in the ontogenetic formation or rats aggressive behavior are not compensated by the experience of rats social intercourse in the period 30-70th days. A hypothesis is made about the existence of sensitive period of rats aggressive behaviour formation with the approximate limits 15th-30th days of postnatal life during which under the influence of contacts with rats of the same age prerequisites are created for consolidation of various agonistic reactions in resultant act of mature aggression.


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