Abstract

Many authors have proposed a fasting endurance hypothesis (FEH) that posits a Fitness advantage to larger mammals relative to smaller ones in environments in which food supplies fluctuate seasonally. A central argument of the FEH is that large mammals will not starve to death as quickly as smaller sized ones when deprived of food because of fundamental allometric differences in their metabolic rate and energy storage patterns. We suggest, however, that the FEH is overly simplistic and applies strictly only when the temporal pattern of resource variability and the organism's response to this variability are independent of body size: relationships that are unlikely

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