Sea Otter Natural History. Kuker, K., L. Barrett-Lennard. Download a beautiful Southern sea otters wallpaper from the Monterey Bay Aquarium. The Ventura FWO website is a portal that provides information and guidance for the conservation, protection, and enhancement of fish, wildlife and plants, and their habitats. The population is most secure in Russia. The current range extends along the California coast from Half Moon Bay in the north to Santa Barbara in the south, though individuals are occasionally seen outside these limits. Currently the southern sea otter population is estimated at just above 3,000 animals. Today, southern sea otters live along the central coast of California; northern sea otters live along the coasts of Washington, Canada, and Alaska. First, the sea otter uses their feet to reduce or maximize heat loss when water temperatures are too hot or too cold. Can otters use tools? Pups are constantly groomed while resting upon their mother’s chest for the first 2 months. Sea otters increase biodiversity and primary productivity of the nearshore environment by controlling populations of grazers, sea urchins in particular, which feed on kelp. Southern sea otters live along a stretch of less than 400 kilometers (250 miles) of the California coast around Monterey Bay. Sea otters prefer coastal habitats within a mile of the shoreline. 4. Molting of their fur takes place gradually throughout the year and frequent grooming is essential to maintain its insulative properties. Prepared in cooperation with Bureau of Ocean Energy Management (OCS Study BOEM 2017-002) Open-File Report 2017–1001 Unlike other marine mammals, sea otters do not have a thick layer of blubber and rely upon their water-resistant fur for insulation. A southern sea otter in it's habitat with one of the many other organisms living near it. Our responsibility is management of these important natural resources in Ventura, Los Angeles, San Luis Obispo, Monterey, San Benito, Santa Cruz, and Santa Barbara Counties. Humans only have about 100,000 hairs in total on our heads. They are also seen in areas of expansive open soft sandy bottom habitat and coastal wetland waterways such as Elkhorn Slough. A top layer of fur is long, waterproof hairs that keep the layer of underfur dry which helps with thermoregulation of the otter’s body temperature by keeping cold water away from their skin. Sea otters eat between 20-35% of their own body weight daily. ... Southern Sea Otters. (1.12m) for females. Prepared in cooperation with Bureau of Ocean Energy Management (OCS Study BOEM 2017-002) Open-File Report 2017–1001 The life of a southern sea otter Sea otters spend most of their time near the shore. Sea Otter Facts. Sea otters once ranged from Mexico to Alaska and even to Japan. Once a pup is weaned a female will soon mate again. As shown by our study, sea otters can colonize and persist in southern California habitats at densities comparable to central California, and their affinity for specific habitat features makes it possible to predict their future distribution. They live on a wet coast or in the ocean where they find their prey. Southern sea otter pup Langly was orphaned when her mother received a fatal bite from a great white shark. The otter's habitat is in danger, though. Sea Otters have very distinct habitats. Incidence of disease in sea otters is also correlated with contaminants such as tributyltin (used as an anti-fouling agent in boat paint), DDT (a banned pesticide) and PCBs. Sea otters are meticulously clean. Three separate sub species live along the coasts of Russia, Alaska, and California. Sea otters often float at the water's surface in forests of kelp, or giant seaweed, and entangle themselves to keep from moving in the rolling sea. This population, of roughly 2,400 individuals, is believed to be increasing at approximately 5 to 7 percent per year (U. S. Fish and Wildlife Service 1996). They do however alter the distribution of prey species due to their predator-prey relationship. Luckily, her mother was able to get Langly safely to shore where our trained responders were able to rescue her. The sea otters have a flexible skeleton and their face is small and round. Most sea otters remain in habitats with rocky substrate, as their prey tend to be more plentiful in these areas. Therefore, sea otters are crucial to maintaining kelp forest levels, which provide cover and food for many marine animals. This program also only exists for southern sea otters (Joey is a northern one). Determine the extent of movements and spatial use patterns by sea otters along the southern California coast 2. Male sea otters have multiple female partners and are territorial during the breeding season from September to November. http://www/werc/usgs.gov/ProjectSubWebPage.aspx?SubWebPageID+1&ProjectID=, Sign in|Recent Site Activity|Report Abuse|Print Page|Powered By Google Sites. Subspecies: nereis Female otters give birth to a single pup nearly every year with peak pupping season from January through March. We only ever rescue one sea otter pup every couple of years, and we do not have non-releasable adult sea otters that would have survival skills to pass on. This marine mammal can live on land with the same ease as it can live in the water without surfacing for days. Historically, sea otters numbered in the hundreds of thousands in the North Pacific Ocean. The southern sea otter also spends a lot of their time in estuaries. Southern Sea Otter . After eating, they wash themselves in the ocean, cleaning their coat with their teeth and paws. For sure, these people will destroy the habitat of the sea otter. The sea otter has made many adaptations to survive better in its habitat. They live on a wet coast or in the ocean where they find their prey. 1. Sea otters use rocks, other shellfish, or man-made objects to pry prey from rocks and use them as a hammer or anvil to break open the hard outer shell of some prey species. A 2014 study found that sea otters along the southern California coast were almost 10 times more likely to be located within kelp habitat than outside, while outside kelp beds sea otter numbers declined with distance from the edge of kelp canopies. Sea otters naturally thrive in nearshore habitats. Because of the activity in the sea will never ends because many people rely their life on it … As top predators, sea otters are critical to maintaining the balance of nearshore ecosystems, such as kelp forests, embayments and estuaries. and are the smallest marine mammal in North America. Sea otters are the textbook example of a “keystone” species and have a considerable impact on the structure and complexity of their nearshore ecological community. They live on a wet coast or in the ocean where they find their prey. Sea otter tends to be relatively sedentary in comparison to other marine mammals and eat a wide variety of prey species that are filter feeders. Abalone numbers are often high within the sea otters range. Females otters nature at 3 years of age and males at age 5. 6. They also have pockets of loose skin under each foreleg for storing their tools and to hold prey it has found on the seafloor. (Linnaeus, 1758) The sea otter has made many adaptations to survive better in its habitat. Southern sea otters inhabit shallow nearshore coastal ecosystems within 1-2 km from shore. Natural disaster There is a much larger population in Alaska, and sea otters are still found in Russia. Fish and Wildlife Service. The sea otter spends most of its time in the water but, in some locations, comes ashore to sleep or rest. When the water temperatures are too cold sea otters reduce heat loss by floating … They thrive in warm, coastal waters and usually remain within a kilometer from the shore. Oil spills. A Web site of the U.S. The southern sea otter also spends a lot of their time in estuaries. A re-evaluation of the role of killer whales Orcinus orca in a population decline of sea otters Enhydra lutris in the Aleutian Islands and a review of alternative hypotheses. An estuary is the mouth of the river and where the tide meets the stream. 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. Information and Media Sources: Sea otter use a variety of strategies for finding their food. Population. California’s southern sea otter has been listed as a threatened species under the Endangered Species Act since 1977. The southern sea otter was widely believed to be extinct due to the expansive fur trade of the 18th and 19th centuries, which reduced the global population, once 150,000 to 300,000, to roughly 2,000 — a number at which the species seemed unlikely to survive. From evidence found in the fossil record, sea otters and their ancestors have been a component of California’s coastal marine environment for the past five million years. They have webbed feet, water-repellent fur to keep them dry and warm, and nostrils and ears that close in the water. Habitat If you look along California’s coast, starting from Half Moon Bay to Coal Oil Point by Santa Barbra, you can find these magnificent creatures. It sometimes is considered a subspecies of Lontra canadensis.The southern river otter is listed as endangered, due to illegal hunting, water pollution, and habitat loss California kelp forests have some of the highest primary productivity rates (conversion of sunlight to living material) of any naturally occurring ecosystem on earth and are the most diverse ecosystem of the temperate latitudes on earth. These underwater gardens are filled with the otter’s prey, including sea urchins, clams, crabs and abalone. Southern sea otter range expansion and habitat use in the Santa Barbara Channel, California Open-File Report 2017-1001 Prepared in cooperation with Bureau of … Sea otters are now legally free to expand into their former range. (19.8 kg). Scientific Name Enhydra lutris. Diet: Sea Urchins, Mollusks, Crustaceans and some species of fish . Southern Sea Otter. Sea otters play a vital role in the health and stability of the nearshore marine ecosystem as a keystone species IUCN Red List Status Endangered. Some researchers hypothesize that sea otters and their voracious appetites have played an important role in shaping the natural history of the California coastline and the Pacific Rim. Today, southern sea otters live along the central coast of California; northern sea otters live along the coasts of Washington, Canada, and Alaska. Southern sea otters can live to approximately 15 years for males and 16 years for females. Males are aggressive toward females and often having bloody noses or scaring from being bitten during copulation. Sea otters are very vulnerable to oil spills from coastal tankers, which is a primary human related reason why the otters are listed. But due to the fur trade, their numbers plummeted in the early 1900s. 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