[Genotype-related changes in the reproductive function under social hierarchy in laboratory male mice].
The study was designed to investigate genetic differences in reproductive consequences of social hierarchy using inbred mice strains BALB/cLac, PT and CBA/Lac. Two adult males of different genotypes were housed together for 5 days. Hierarchical status of both partners was determined by asymmetry in agonistic behavior. The number of epididymal sperm and a proportion of abnormal sperm, weights of reproductive organs, serum concentration and testicular content of testosterone, and the testosterone response to introduction of a receptive female were determined. The testosterone measures were significantly decreased in the PT strain, the epididymal sperm number was significantly decreased in the BALB/cLac strain and a proportion of abnormal sperm heads was significantly increase in the CBA/Lac (in both dominants and subordinates) as compared to control mice. The testicular testosterone response to a receptive female and precopulatory behavior was unchanged in dominants and suppressed in subordinates of the BALB/cLac strain. The results indicate that in laboratory mice the pattern of reproductive response to social hierarchy is determined by genetic background.
Osadchuk
L V
LV
Salomacheva
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IN
Osadchuk
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AV
D000818:Animals; D004291:Dominance-Subordination; D004822:Epididymis / Q000473:pathology*; D005260:Female; D005838:Genotype; D006608:Hierarchy, Social; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D012098:Reproduction; D012726:Sexual Behavior, Animal; D013045:Species Specificity; D013091:Spermatogenesis; D013094:Spermatozoa / Q000473:pathology*; D013739:Testosterone / Q000097:blood*
D013739:Testosterone