Changes in the aggressiveness of mice resulting from selective breeding, learning and social isolation.

  title={Changes in the aggressiveness of mice resulting from selective breeding, learning and social isolation.},
  author={Kirsti M. J. Lagerspetz and Kari Y. H. Lagerspetz},
  journal={Scandinavian journal of psychology},
  volume={12 4},
LAGERSPETZ, K. M. J. & LAGERSPETZ, K. Y. H. Changes in the aggressiveness of mice resulting from selective breeding, learning and social isolation. Scand. J. Psychol. 1971, 12, 241–248.–Selective breeding for aggressiveness and non-aggressiveness in mice has now been going on for 19 generations. The aggressiveness score distributions of the males have not changed since the 7th generation. Socially naive male mice which had been living in isolation, had five encounters with submissive males, and… 
Predatory aggression in male mice selectively bred for isolation-induced intermale aggression.
Male mice differing in their genetically determined disposition for isolation-induced intermale aggression were compared on behaviors related to predatory aggression, suggesting that there may be parallels in genetic variation between intermale and predatory attacking.
The decline of aggressiveness in male mice during group caging as determined by punishment delivered by the cage mates
Group-housed rodents are generally less aggressive than isolated counterparts. The present study examined the role of defeat by cage mates as a reason for this decline in aggressiveness. In
Effects of early exposure to intermale aggression on the aggressiveness of adult male mice varying in their genetic disposition for aggressive behavior
Early experience and the genetic disposition for aggression were correlated; TA males showing the greatest increase in aggressive behavior; the role of early olfactory learning is discussed.
The physiology of aggression: towards understanding violence
Personality, as a suite of correlated behavioural traits, has a genetic basis. Therefore, it is likely that selection for one trait leads to co-selection for other traits. We tested the association
Selective breeding for isolation-induced intermale aggression in mice: associated responses and environmental influences.
Maternal factors during the preweaning period do not significantly affect the development of aggression in TA and TNA males, while early postweaning exposure to aggression or sex enhanced later aggressive and sexual activity is found.
A developmental-genetic analysis of aggressive behavior in mice. II. Cross-sex inheritance
In postpartum tests and in repeated intruder trials over the life span of group-reared animals, females from the line of high-aggressive males were more aggressive than females fromThe line of low- aggressive males.
Isolation Associated Aggression – A Consequence of Recovery from Defeat in a Territorial Animal
It is concluded that the reduced aggressiveness of grouped crickets is a manifestation of the loser effect resulting from social subjugation, while isolation allows recovery to a state of heightened aggressiveness, which in crickets can be considered as the default condition.
Correlated response in selection for aggressiveness in female mice. I. Male aggresiveness
The results suggest that male aggressiveness and female aggressiveness are under separate genetic control.
Experiential determinants of postpartum aggression in mice.
  • J. A. Green
  • Psychology, Biology
    Journal of comparative and physiological psychology
  • 1978
The behavior of the male exerted important influences on the structure of extended female-male interactions as well as the experiential determinants and the social controls of postpartum aggregation in mice.
Learning of submissive behavior in mice: A new model


Lagerspetz, Kirsti. Genetic and social causes of aggressive behaviour in mice. Scand. J. Psychol., 1961, 2, 167—-173.—Significant differences in the aggressiveness of mice selected for aggressiveness
The effects of socially-induced aggressiveness or nonaggressiveness on the sexual behaviour of inexperienced male mice.
High aggressiveness induced by repeated victories over another mouse was found to decrease sexual behaviour of male albino mice, and nonaggressiveness induced in fights did not affect the level of sexual activity as compared with that of the control animals.
Some Effects of Conditioning on Social Dominance and Subordination in Inbred Strains of Mice
Interest in the subject now centers mainly on inquiries concerning the extent to which such social organizations exist in nature and upon an analysis of the factors which underlie and control their establishment and maintenance.
The effect of prior aggressive or sexual arousal on subsequent aggressive or sexual reactions in male mice.
Previous aggressive behaviour towards a male mouse was found to decrease sexual behaviour of inexperienced male mice towards a female in heat, mainly due to aggressive behaviour occurring in the
Studies with chronically isolated rats: tissue levels and urinary excretion of catecholamines and plasma levels of corticosterone.
  • K. Moore
  • Biology, Medicine
    Canadian journal of physiology and pharmacology
  • 1968
There were no significant differences between the body or organ weights or in the tissue content of catecholamines in the two groups, but isolated animals exhibited an increased sensitivity to the toxicity of isoproterenol.
Alteration in Learning Ability Caused by Changes in Cerebral Serotonin and Catechol Amines
Excess of cerebral serotonin decreased maze-learning ability of adult mice; deficiency of serotonin and catechol amines increased it slightly.
Neurochemical and endocrinological studies of mice selectively bred for aggressiveness.
Differences were found in the weight and the serotonin content of the forebrain, in the catecholamine contents of the brain stem and of the adrenal gland as well as in the Weight of the testis in male albino mice from two strains selectively bred for aggressiveness.