Polar Encyclopædia
SEALS AND WALRUSES
AMPHIBIAN MAMMALS
Walruses, seals and sea lions (otaries) are carnivorous marine mammals. Like their cousins found in Antarctica, they belong to the order of Pinnipedia (“feet like flippers”). They are perfectly amphibian and are just as at home in the water (flippers, streamlined shape, food mainly fish molluscs and crustaceans) as on land (lungs, birth in the open air).
PHOQUES ET OTARIES
Dans l’océan Arctique vivent plusieurs espèces de phoques (phoque barbu, phoque annelé, etc.) et d’otaries (lion de mer de Steller, otarie à fourrure). Pour ne plus les confondre, retenez que seules les otaries ont des oreilles visibles et replient leurs “pattes” arrière pour marcher à terre ; les phoques, eux, rampent sur le sol. Orques et ours blancs sont leurs prédateurs naturels.
THE WALRUS, SENTINEL OF THE ARCTIC
The walrus is a large potbellied (they can weight up to 1,200 kg) mammal with huge tusk teeth (evolved from canines) that lives in herds along the edge of the Arctic. It has very stiff “tactile” whiskers around its muzzle. The walrus digs around on the sea bed with its tusks, stirring up molluscs that it crunches before sucking them up. Walruses also occasionally eat seals.
A NEW THREAT: POLLUTION
Many Inuit depend almost entirely on seals for their livelihood. Theirs is a seal-based civilisation: seals provide their food, clothes, tools, etc., but they husband local seal stocks. On the other hand, certain species of pinniped have been decimated by hunters coming to the Deep North to exploit them for oil and furs. And today they face a new, and more insidious threat: the chemical waste from human activities is accumulating in their body fat.
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