Elsevier

Hormones and Behavior

Volume 36, Issue 1, August 1999, Pages 25-38
Hormones and Behavior

Regular Article
Species Differences in Paternal Behavior and Aggression in Peromyscus and Their Associations with Vasopressin Immunoreactivity and Receptors

https://doi.org/10.1006/hbeh.1999.1522Get rights and content

Abstract

Previous comparative studies have suggested that the distribution of arginine vasopressin (AVP) pathways within the brain is associated with species-typical patterns of social behavior. In the current study, male parental behavior and aggression were compared in two species of Peromyscus. As predicted based on other studies, male mice from a monogamous species, the California mouse Peromyscus californicus, spent more time providing parental care to offspring than males from a polygamous species, the white-footed mouse Peromyscus leucopus. Sexually naive male California mice also attacked opponents more rapidly than white-footed mice during resident–intruder and neutral aggression tests. Since AVP has been shown to modulate these behaviors, we compared the distribution of vasopressinergic neurons and receptors. We predicted that greater AVP-immunoreactive (AVP-ir) staining in the bed nucleus of the stria terminalis and AVP receptor density in the lateral septum would occur in the species with low levels of paternal care because this pattern was found in similar comparisons with sexually naive monogamous and polygamous voles. In contrast, in our study, monogamous male mice showed more AVP-ir staining in the bed nucleus of the stria terminalis than the polygamous species, as well as more AVP receptors in the lateral septum. Parental behavior therefore does not appear to predict differences in patterns of AVP-ir staining and receptor distribution across species or vice versa. We propose the hypothesis that aggression may be better correlated with species patterns of AVP-ir staining density and receptor distribution.

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