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DEPE | Séminaires BEEPSS / BEEPSS Seminars » Mammalian Social Evolution

Mammalian Social Evolution

Dernière mise à jour : mardi 10 mars 2020, par Catherine Berger

Presented by : Carsten Schradin, IPHC-DEPE
Date : Thursday 4th June 2020, 13:00-14:30
Place : Amphithéâtre Marguerite Perey, bât 1

Understanding the evolution of social diversity has always been a hallmark in behavioral ecology. In comparative studies, species are typically considered to have only one form of social organization, even though we know that many species show variable forms of sociality. Here I first show a case study with data from 15 generations showing that intra-specific variation in social organization from group- to solitary back to group-living is related to unpredictable changes in population density and reproductive competition. I then show that the same pattern emerges when variation does not occur over time but over space in a study simultaneously considering 8 populations. Finally, I demonstrate the importance of taking intra-specific variation into account in phylogenetic studies by showing that the ancestral state for several mammalian orders was most likely a socially flexible one. In sum, considering intra-specific variation in social organization changes the way we understand social evolution.