Abstract
C57BL/6J male mice ordinarily kill neonatal mouse pups even if they are rendered androgen deficient by neonatal castration. Experiment 1 showed that adrenalectomy during adult life significantly decreased the tendency of neonatally gonadectomized males to kill newborns. Experiment 2 demonstrated that testosterone exposure (via silastic implants) during adult life prevented the effects of adrenalectomy in that killing was elevated and retrieving was reduced in neonatally gonadectomized males. Adrenal androgens may be responsible for maintaining killing behavior in neonatally castrated C57BL/6J male mice.
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