Why do female reindeer have antlers? Cannibalism, probably.
A new study suggests that female caribou grow antlers to store energy, which is then consumed by other caribou, providing necessary nutrients. The antlers are rich in calcium and phosphorus, making them a valuable snack for new mothers.
Female caribou are unique among deer species in growing antlers. Researchers collected 1,567 antlers from the Arctic National Wildlife Refuge in Alaska and found that 86% were gnawed by other caribou. The antlers are rich in calcium and phosphorus, making them a valuable snack for new mothers. The Porcupine Caribou Herd migrates 1,500 miles between their winter range and calving grounds, and the shed antlers provide a readily available source of nutrients. The study suggests that the energy invested in growing antlers is recouped through consumption by other caribou. This behavior is a unique adaptation to the harsh Arctic environment.
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