An adult pelt can average 800 million to 1 billion hairs! They will eat nearly any seafood they can find in their kelp forest foraging grounds. The sea otter would hold the stone in both paws, and hammer the side of the shell at the rate of 45 blows in 15 seconds! The tail comprises less than a third of the body length. The sea otter is one of the smallest marine mammal species, but it is the heaviest mustelid. Sea otters are the only carnivore with just 4 lower incisors. The fur consists of two layers: a dark undercoat and longer, lighter-colored guard hairs, … Prepare for furs so dense and soft that words to describe them are hard to find. Sea otters eat approximately 25 percent of their weight in food each day. Sea otter fur is the densest of all mammals with 100,000-400,000 hairs/sq cm (that’s up to one million hairs per square inch!) These otters have brown-to-gray fur, and their undersides are a lighter, silvery shade. Sea otters, Enhydra lutris (Linnaeus, 1758), are the largest member of the Family Mustelidae (70 species of river otters, skunks, weasels, badgers, etc.) On down the coast the Russian hunters moved to present-day California. Then there’s the number of hairs per follicle. ()also: "Sea otters have an amazing 1 million hairs per square inch. Unlike the river otter, the sea otter mother is the pup’s cradle, protection, and home for the first months of its life. But as a guide, a dressed, farmed pelt has about 24,000 hairs per cm2. Hair density. In the case of chinchilla, farming didn’t just help protect wild populations, it probably saved them. The short, more dense, under layer of fur can have as many as 1 million hairs per square inch, which is the densest of any mammal. Photo: North American river otter (Lutra canadensis). Delayed implantation produces varied gestation times. The Marine Mammal Center, Sea Otter, Enhydra lutris, Research Enhydra lutris @Barcode of Life BioOne Biodiversity Heritage Library CITES Cornell Macaulay Library Encyclopedia of Life (EOL) ESA Online Journals FishBase Florida Museum of Natural History Ichthyology Department GBIF Google Scholar ITIS IUCN RedList (Threatened Status) Marine Species Identification Portal NCBI (PubMed, GenBank, etc.) That means a regular chin has 50,000 per cm2 – double a farmed, dressed mink pelt, and 263 times more than our human blonde. Sea otter fur is the densest of all mammals, with about 100,000 hairs per square centimeter. THE SEA-OTTER TRADE AND THE NORTH-WEST PASSAGE. Size also matters; because small mammals are more vulnerable to heat loss, they generally have denser fur. But was it too late? Also, farmed mink is denser than wild, and a dressed pelt is denser than a live animal. For its size, the male otter's baculum is very large, massive and bent upwards, measuring 150 mm (5.9 in) in length and 15 mm (0.59 in) at the base. Females are smaller, weighing 14 to 33 kg (31 to 73 lb) and measuring 1.0 to 1.4 m (3 ft 3 in to 4 ft 7 in) in length. Very interesting article quite enjoyed it. And here I sit with male pattern baldness kicking in....smug otters and … Animals with the densest furs live where climates are cold, humid and windy. Scientists estimate a growth rate that could put the current population over 40,000. whereas humans only have 20,000 hairs on their whole head! When the otter swims, its coat traps a layer of air close to its body. Sea Otter Furs are the most sought after furs. and are the smallest marine mammal in North America. And so we find ourselves in the high Andes, home of the long-tailed Chinchilla lanigera and short-tailed Chinchilla chinchilla. Identifying factors that influence sea otter (Enhydra lutris) population density can provide insight into why it varies spatially and temporally and when a recovering population has reached an equilibrium density because of food resources (i.e., carry It makes sense, though, when you explain why it is so, however. Offspring Produced: 1 (average) Their small heads widen to long necks and shoulders, and they have flattened, well-muscled tails. The abalone can be from 15-25 cm across and have up to a kilogram of meat inside. An adult pelt can average 800 million to 1 billion hairs! It may take two to three dives for abalone bashing, but the sea otter’s persistence eventually pays off. But unlike sea otters, the sea cows didn’t survive the onslaught. Their average dive lasts about a minute; the longest dive recorded, however, lasted 4 minutes. HOME  |  MARINE LIFE  |  CONSERVATION  |  SCIENCE  |  EDUCATION/JOBS  |  THE SOCIETY  |  OUR BLOG  |  DONATE  |  SHOP, "For all at last returns to the sea — to Oceanus, the ocean river, like the everflowing stream of time, the beginning and the end." You can see now why sea otters spend a large portion of time daily grooming themselves as they float on top of the water! Pregnancy has been reported to be 4-12 months. Sea otters usually swim on their backs at the water’s surface using their rear flippers to move and their tails to steer. They inhabit temperate coastal waters with rocky or soft sediment ocean bottoms less than 1 km from shore. Clams don’t just sit there waiting to be picked up by some sea otter or recreational digger, they want to live, so consequently, the sea otter has to dig to get the clam. but other problems began to occuring more fequently. We can blame the “tragedy of the commons” for that. Thankfully, in 1911,sea otters received protection, as the International Fur Seal Treaty was established to prevent various exercies of trading. To this day, sea otter trading/selling has become more rare. The mother would only have room for one pup. There they were joined by adventurers from all over North America and Europe in the great California Fur Rush. Thankfully the ground-breaking North Pacific Fur Seal Convention of 1911 put an end to seal otter fever by imposing a moratorium on the hunt. (Photo by Angela Denning/KFSK) The population in Southeast is growing steadily. Fish & Wildlife Service Endangered Species, Florida Museum of Natural History Ichthyology Department, Foraminifera: Hard on The Outside, Squishy on the Inside, “Why there is hope that the world’s coral reefs can be saved”, THE BANDA ARC, Life in Alor and the Banda Sea (4k), Trying to Make Sense of This Overwhelming World, Designed, built, tested, and managed by MB. Sea otters are diurnal with crepuscular (twilight) peaks in foraging activity. Then, in 1938, a raft of about 300 sea otters was discovered off the coast of Big Sur, California. Friends of the Sea Otter The hair density of adult Eurasian otters Lutra lutra (Linnaeus, 1758) and sea otters Enhydra lutris (Linnaeus, 1758) was analysed using skin samples taken from frozen carcasses. They are slow swimmers, about 9 kph under water. The otter fur trade wiped them from existence. This site uses Akismet to reduce spam. North American river otters, also called Canadian otters, have long, muscular, streamlined bodies with short legs and fully webbed feet bearing non-retractable claws. Since sea otters do not have any insulating fat, the fur is responsible for maintaining warmth in waters typically 1-10°C. Laws have been passed to limit the use of fishing nets along the coastline. 18th and 19th centuries reduced sea otter populations to less than ˘2,000 individuals combined. A mink’s hair density varies by season and body part. Males weigh 22-45 kg and are 1.2-1.5 m in length. The sea-otter trade to China brought a great wave of merchant ventures to Nootka Sound in a brief twenty-year period. This causes chilling and death (hypothermia). The short, more dense, under layer of fur can have as many as 1 million hairs per square inch, which is the densest of any mammal. Welcome to Alaska Sea Otter Products-fur blankets, fur apparel. While the soles of the slippers have been replaced a few times the fur is perfect. Fishing nets are another cause of sea otter deaths. Several wrote of the gains to be had from the sea-otter hunt. Consider: The fur of the sea otter is denser than that of any other mammal, with some one million hairs per square inch (155,000 per sq cm). Sea otters eat shellfish and other invertebrates (especially clams, abalone, and sea urchins). and underhairs measuring 12 mm (0.47 in.). It has been estimated that the abalone can exert suction equal to about 4,000 times its own body weight. And even if most chinchilla now live in pens and eat hay and pellets, there is absolutely no chance of them going extinct! Thanks for the info. Eight years ago a survey counted about 25,000 animals. By the late 1700s, British and American hunters had begun harvesting otter pelts in California and selling them to trading outfits including Hudson’s Bay Company. No other terrestrial mammal comes close. The southern sea otter was thought to be extinct. When a sea otter finds some food, like a shellfish, it will tuck it into loose skin folds in its armpits, which are used like shopping bags. Her food requirements are large, and so are the pups. Weaning: 2-11 months, Current IUCN Conservation Status for Sea Otters Conservation Evidence NOAA UNEP World Conservation Monitoring Centre: Sea Otters Check the Seafood Watch List for this species. Each strand is sort of spiky so that it becomes entangled and matted. Making fur garments is a … There are peaks of birth in May-June in the Aleutian Islands and in January-March in the California population. Truth About Fur Blog – Research, opinions and analysis. ... during and after the arrival of sea otters, which — because of their post-fur trade population recovery — are still recolonizing reef habitats across the North Pacific Rim. Your email address will not be published. As top predators, sea otters are critical to maintaining the balance of nearshore ecosystems, such as kelp forests, embayments and estuaries. So dense is a chin’s fur that it’s said fleas and ticks can’t penetrate it, and if they could, they’d suffocate! in 1965 and 1992. By modeling the sea otter as a cylinder and using its average mass (29 kg for males), height (1.22 m for males), and skull width (0.1 m), its density can be calculated: This density is less than that of seawater (~1025 kg/m 3 ), allowing the otter to float; it is also less than that of the average human body (1010 kg/m 3 ). Sea otters have rebounded in two-thirds of their historic range, and are today cited as a great success story in the annals of marine conservation. The female otter will roll about in the water the same way she does when she is cleaning her tail, and on one roll, will come out of the water with a small, wet pup in her teeth. At its upper range, that’s four times denser than the finest show chin, 16 times denser than a farmed mink, and 2,105 times denser than our human blonde. The number of sea otters counted decreased by 75% between 1965 and 2000; 88% for islands at equilibrial density in 1965. On the rare occasion of twins, the mother can only raise one. Free Shipping on all orders over $100.00 (907) 617-4559. The northern sea-otter furs were the most highly esteemed of furs, alongside sable, by the Qing court. Sea otters have the thickest coat of any . Extinction seemed inevitable. The otter fur trade wiped them from existence. Females tend to stay away from males except when mating. By the late 1700s, British and American hunters had begun harvesting otter pelts in California and selling them to trading outfits including Hudson’s Bay Company. ... Fur density. Sea otters must eat 25% of their body weight each day in order to stay alive. The mother would have a hard time getting enough food for two additional mouths. Starting from the Kuril Islands, the traders island-hopped across the North Pacific, harvesting one otter population after another, plus highly profitable hair seals they found along the way. Fur apparel. and are the smallest marine mammal in North America. The sea otter’s fur keeps them warm also by trapping air in its coat, but the sea otter’s coat does not shed. A blonde’s fine hairs average about 190 per cm2, varying depending on the part of the scalp. at a million hairs per square inch makes them the most densest and desirable furs on the planet. The sea otter connection. Both furs are great, but otter wears like iron where chinchilla is delicate. Save my name, email, and website in this browser for the next time I comment. Sea otter fur is the densest of all mammals, with about 100,000 hairs per square centimeter. To appreciate what makes fur dense, let’s set a baseline: human hair. Otter is not only dense but tough. In 1775 otter pelts sold in the Russian port of Okhotsk at up to 30 times the price of sable. Male sea otters usually weigh 22 to 45 kg (49 to 99 lb) and are 1.2 to 1.5 m (3 ft 11 in to 4 ft 11 in) in length, though specimens up to 54 kg (119 lb) have been recorded. They bang the hard shell on the rock until it breaks open. Sea otters become caught in the nets and drown. Before the advent of modern conservationism, this meant that the densest furs were prone to over-harvesting. While other marine mammals use a thick layer of blubber to keep warm, the sea otter uses its thick coat of fur, with a density approaching 165,000 hairs per square centimeter. Chinchilla's only have the highest for land mammals. Now there are other threats to sea otters. Could they ever recover? Farming of animals can help conserve their wild cousins. And unlike that other four-legged marine mammal, the polar bear, they don’t leave the water unless they absolutely have to. The article currently says that fur density can reach 400,000 hairs per cm 2. And due to a remarkable story in the history of farming, the second-densest is abundant and readily available. Being small and nocturnal makes them elusive. Yes they could! Fish & Wildlife Service Endangered Species Home; Random; Nearby; Log in; Settings; Donate; About Wikipedia; Disclaimers Pups are small, ranging from 1-3 kg. Sea otters have the densest fur in the animal kingdom, ranging from 250,000 to a million hairs per square inch, which insulates them and maintains warmth. Impressed? Trade in the densest fur of all is still restricted, but the animal’s recovery is considered a great conservation success. And then the cavalry arrived, in the unlikely form of fur farmers. Alaska is unique. The underhairs average 7 to 9 mm (0.28-0.35 in.). Swimming is performed using the hind limbs, tail, and vertical undulations of the body while the forelimbs are tucked into the chest. Sea otters are a keystone species, meaning their role in their environment has a greater effect than other species. Exempted from the hunting ban, Alaskan coastal communities are also building a highly regulated trade in sea otter handicrafts and garments. Their small heads widen to long necks and shoulders, and they have flattened, well-muscled tails. The live on a diet of crabs, urchins, clams, and similar–often using rocks and tools to open shells. This has helped some sea otter populations. SEE ALSO: AMAZING FACTS ABOUT FUR: DRESSING FOR THE ARCTIC. Fur length varies considerably with the species. Their dense, short under-fur is overlain by darker, coarse guard hairs that help repel water. The U.S. FWS's Threatened & Endangered Species System track information about listed species in the United States This has angered commercial abalone divers and surprised biologists trying to figure out how the sea otter releases the creature from the stone. Your email address will not be published. Alaskan native Peter Paul Kawagaelg Williams, founder of Shaman Furs, is in a special position to bring sea otter to the international fashion scene. On down the coast the Russian hunters moved to present-day California. 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