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Jan

8

2009
 
 

You Snooze, You Win?



The slow, sleepy and shy may win the race for survival. Turns out that it pays to sleep away your troubles. At least, that is, if you’re a mammal facing environmental threats like pollution, deforestation, and climate change. In a study in The American Naturalist, scientists categorized all 4,536 living mammal species based on whether they exhibited “sleep-or-hide” (SLOH) behaviors such as hibernation or the use of burrows. The goal was to test the theory that, because “sleeper” species conserve energy during stressful periods and “hiders” spend less time exposed to the elements, they might be better able withstand a changing planet. Sure enough, the researchers found that the 443 species that made the SLOH cut—groundhogs, moles, and bats to name a few—were less likely than more active mammals to be classified as threatened or endangered on the International Union for Conservation of Nature’s Red List. This held true even after accounting for other factors that affect extinction risk, such as body size and geographic range. The study delivers the first confirmation that SLOH species might make up a disproportionately large percentage of the survivors of current, and likely past, extinction crises. Maybe burying your head in the sand isn’t such a bad idea after all. —Jessica Leber Source: Liow, L.H. et al. 2009. Lower Extinction Risk in Sleep-Or-Hide Mammals. The American Naturalist DOI: 10.1086/595756 Image © Alan Tobey / iStock

Filed Under Climate change, Endangered species | 

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