Community Structure and the Spread of Infectious Disease in Primate Social Networks

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Community Structure and the Spread of Infectious Disease in Primate Social Networks

Show simple item record Griffin, Randi Heesoo Nunn, Charles Lindsay 2012-05-10T19:01:03Z 2011
dc.identifier.citation Griffin, Randi H. and Charles L. Nunn. Forthcoming. Community structure and the spread of infectious disease in primate social networks. Evolutionary Ecology. en_US
dc.identifier.issn 0269-7653 en_US
dc.identifier.issn 1573-8477 en_US
dc.description.abstract Living in a large social group is thought to increase disease risk in wild animal populations, but comparative studies have provided mixed support for this prediction. Here, we take a social network perspective to investigate whether patterns of social contact within groups influence parasite risk. Specifically, increased modularity (i.e. sub-grouping) in larger groups could offset the increased disease risk associated with living in a large group. We simulated the spread of a contagious pathogen in random social networks to generate theoretically grounded predictions concerning the relationship between social network connectivity and the success of socially transmitted pathogens. Simulations yielded the prediction that community modularity (Q) negatively impacts parasite success. No clear predictions emerged for a second network metric we considered, the eigenvector centralization index (C), as the relationship between this measure and parasite success depended on the transmission probability of parasites. We then tested the prediction that Q reduces parasite success in a phylogenetic comparative analysis of social network modularity and parasite richness across 19 primate species. Using a Bayesian implementation of phylogenetic generalized least squares and controlling for sampling effort, we found that primates living in larger groups exhibited higher Q, and as predicted by our simulations, higher Q was associated with lower richness of socially transmitted parasites. This suggests that increased modularity mediates the elevated risk of parasitism associated with living in larger groups, which could contribute to the inconsistent findings of empirical studies on the association between group size and parasite risk. Our results indicate that social networks may play a role in mediating pressure from socially transmitted parasites, particularly in large groups where opportunities for transmitting communicable diseases are abundant. We propose that parasite pressure in gregarious primates may have favored the evolution of behaviors that increase social network modularity, especially in large social groups. en_US
dc.description.sponsorship Human Evolutionary Biology en_US
dc.language.iso en_US en_US
dc.publisher Springer Netherlands en_US
dc.relation.isversionof doi:10.1007/s10682-011-9526-2 en_US
dc.relation.hasversion en_US
dash.license OAP
dc.subject social networks en_US
dc.subject primates en_US
dc.subject infectious disease en_US
dc.subject parasite richness en_US
dc.subject sociality en_US
dc.subject comparative study en_US
dc.subject agent-based model en_US
dc.title Community Structure and the Spread of Infectious Disease in Primate Social Networks en_US
dc.type Journal Article en_US
dc.description.version Accepted Manuscript en_US
dc.relation.journal Evolutionary Ecology en_US Nunn, Charles Lindsay 2012-05-10T19:01:03Z

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