Ecological Correlates of Group-Size Variation in a Resource-Defense Ungulate, the Sedentary Guanaco

Abstract

For large herbivores, predation-risk, habitat structure and population density are often reported as major determinants of group size variation within and between species. However, whether the underlying causes of these relationships imply an ecological adaptation or are the result of a purely mechanistic process in which fusion and fragmentation events… (More)
DOI: 10.1371/journal.pone.0089060

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6 Figures and Tables