Lemur
Metabolism

Lemurs have low basal metabolic rates (BMR), which helps them to conserve energy during the dry season, when water and food are scarce. They can optimize their energy use by lowering their metabolic rate to 20% below the values predicted for mammals of similar body mass. The red-tailed sportive lemur (Lepilemur ruficaudatus), for instance, reportedly has one of the lowest metabolic rates among mammals. Its low metabolic rate may be linked to its generally folivorous diet and relatively small body mass. Lemurs exhibit behavioral adaptations to complement this trait, including sunning behaviors, hunched sitting, group huddling, and nest sharing, in order to reduce heat loss and conserve energy. Dwarf lemurs and mouse lemurs exhibit seasonal cycles of dormancy to conserve energy. Before dry season, they will accumulate fat in white adipose tissue located at the base of the tail and hind legs, doubling their weight. At the end of the dry season, their body mass may fall to half of what it was prior to the dry season. Lemurs that do not experience states of dormancy are also able to shut down aspects of their metabolism for energy conservation.
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