Abstract:
:In the guinea pig, the presence of the mother, but not littermates, has been found to inhibit hypothalamic-pituitary-adrenal (HPA) responses during brief (30-60 min) exposure to novel surroundings both prior to and several weeks following the completion of weaning. In the present study, we found that an unfamiliar adult female inhibited plasma cortisol and vocalization responses of pre- and postweaning guinea pigs during a 60-min exposure to a novel environment. However, the presence of the mother still had a greater effect on the cortisol levels of the young, at least during the preweaning period. The moderating influence of the unfamiliar adult female on vocalizations and cortisol levels occurred despite behavioral interactions, such as heightened aggression and sexual behavior, not seen during tests with the mother. It is suggested that the unfamiliar adult female's effectiveness in reducing HPA activity during exposure to novelty may facilitate the change in patterns of social interaction occurring in recently weaned animals.
journal_name
Dev Psychobioljournal_title
Developmental psychobiologyauthors
Graves FC,Hennessy MBsubject
Has Abstractpub_date
2000-03-01 00:00:00pages
91-100issue
2eissn
0012-1630issn
1098-2302pii
10.1002/(SICI)1098-2302(200003)36:2<91::AID-DEV1>3journal_volume
36pub_type
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