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Horm Behav. 2019 Jan;107:67-75. doi: 10.1016/j.yhbeh.2018.11.002. Epub 2018 Dec 17.

Frank Beach award winner: Neuroendocrinology of group living.

Author information

1
Department of Psychology, Department of Biology, Program in Neuroscience, Smith College, Northampton, MA 01063, United States of America. Electronic address: abeery@smith.edu.

Abstract

Why do members of some species live in groups while others are solitary? Group living (sociality) has often been studied from an evolutionary perspective, but less is known about the neurobiology of affiliation outside the realms of mating and parenting. Colonial species offer a valuable opportunity to study nonsexual affiliative behavior between adult peers. Meadow voles (Microtus pennsylvanicus) display environmentally induced variation in social behavior, maintaining exclusive territories in summer months, but living in social groups in winter. Research on peer relationships in female meadow voles demonstrates that these selective preferences are mediated differently than mate relationships in socially monogamous prairie voles, but are also impacted by oxytocin and HPA axis signaling. This review addresses day-length dependent variation in physiology and behavior, and presents the current understanding of the mechanisms supporting selective social relationships in meadow voles, with connections to lessons from other species.

KEYWORDS:

Estradiol; Glucocorticoids; Group living; Meadow vole; Oxytocin; Partner preference; Photoperiod; Prairie vole; Social behavior; Sociality

PMID:
30439353
PMCID:
PMC6371784
DOI:
10.1016/j.yhbeh.2018.11.002
[Indexed for MEDLINE]
Free PMC Article

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