Average basal metabolic rate 98.479 W AnAge.Range length 1 to 1.5 m 3.28 to 4.92 ft.( Estes, 1980 Nowak, 1999 Paine, 1993 SeaWorld Parks & Entertainment, 2011) Sea otters are the only carnivores with just 4 lower incisors.
#TOKYO SPECIES 2012 SUBTITLE SKIN#
Sea otters have patches of loose skin under the forearms that they use to help store tools (usually a rock) so they can have free “hands” while eating, and to transport food during diving. The forelimbs are short and have retractable claws, which help with grooming and eating. The hind legs are long and the paws are broad, flat and webbed. Sea otters have circular, furry faces with short noses, rounded eyes and ears, and long whiskers that assist in foraging for food. Because sea otters do not have any insulating fat, the fur is responsible for heat maintenance. Sea otter fur is the densest of all mammals, with about 100,000 hairs per square centimeter. The fur consists of two layers: a dark undercoat and longer, lighter-colored guard hairs, which trap a layer of air next to the skin to keep it dry. The tail comprises less than a third of the body length, measuring 25 to 35 cm. Males measure 1.2 to 1.5 m in length, while females measure 1 to 1.4 m. Adult male California sea otters average 29 kg in mass, while females average 20 kg.
Adult male Alaskan otters weigh 27 to 39 kg, while females weigh 16 to 27 kg. Range depth 45 to 0 m 147.64 to 0.00 ftĪlaskan sea otters are slightly larger than Californian otters.The shallower the water, the less time is spent diving to reach food. While sea otters are capable of diving to depths of at least 45 meters, they prefer coastal waters up to 30 meters deep. They eat, rest, and groom themselves at the water surface. They live in offshore forests of giant kelp ( Macrocystis pyrifera), and spend most of their active time foraging below the canopy. Sea otters inhabit temperate coastal waters with rocky or soft sediment ocean bottom. Enhydra lutris kenyoni is distributed throughout the Aleutian Islands and southern Alaska, and has been reintroduced to various locations from south of Prince William Sound, Alaska to Oregon. Enhydra lutris nereis is found off the coast of central California. Enhydra lutris lutris ranges from the Kuril Islands north to the commander islands in the western pacific. Hunting during the 18th and 19th centuries greatly reduced the distribution of sea otters. Sea ice limits their northern range to below 57 degrees N lattitude, and the distribution of kelp forests limits the southern range to about 22 degrees N lattitude. Sea otters, Enhydra lutris, are found in two geographic regions on the Pacific Coast: along the Kuril and Commander Islands off the coast of Russia, the Aleutian Islands below the Bering Sea, and the coastal waters off the Alaskan Peninsula to Vancouver Island, Canada and along the central California coast from Ano Nuevo to Point Sur.
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