Optimal group size and seasonal stress in ring-tailed lemurs (Lemur catta)

By R. Pride. 2005

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The ecology of stress: effects of the social environment (2013, background): “2010), socially-mediated glucocorticoid levels were also differentially impacted by food availability and environmental stress in the wild (Pride 2005).”
Costs of group size: lower developmental and reproductive rates in larger groups of leaf monkeys (2008, background): “Questions remain as to what may have caused the observed effects on female reproductive success? Clearly, reduced birth rates can result from food stress experienced year round or during particular seasons ( Pride 2005 ).”
The adaptive value of sociality in mammalian groups (2007, background): “A recent analysis of cortisol levels in free ranging ring-tailed lemurs (Lemur catta) living in groups of different sizes provides evidence that females' stress levels are elevated in groups that deviate from the optimal size (Pride 2005).”
Fitness consequences of group living in the degu Octodon degus, a plural breeder rodent with communal care (2009, background): “When groups exceed certain levels, fitness could decrease because of increased intragroup competition for resources (Clutton-Brock et al. 1982; Pride 2005) and infanticide (van Schaik & Janson 2000).”