Their measurements vary depending on the sex. In 2002, they expanded the candidate stock to include all sea otter populations in southwest Alaska. The sea otters have a flexible skeleton and their face is small and round. The sea otter is the smallest of the marine mammals containing a dense dark brown insulating fur coat (Kenyon, 1969). Figure 1. This file is licensed under the Creative Commons Attribution 3.0 Unported license. By the early 20th century, northern sea otters were nearly extirpated from Alaska as a result of overharvest (Muto et al. Image Size 5108x3300 / 12.3MB www.teklanikaphotography.com. stock of the northern sea otter is insignificant and is approaching a zero mortality and serious injury rate (i.e., 10% of PBR) because observer coverage is not adequate. 2019). The current distribution is marked in red, while the recent observation in Humboldt County is noted as a green dot. Sea otters are protected under the Marine Mammal Protection Act, which prohibits the take (i.e., harass, hunt, capture, or kill) of all marine mammals. Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students.ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. A sea otter has a metabolic rate much higher than most mammals of similar size, and must consume large quantities of food. Map of the current distribution of sea otters (Enhydra lutris) in California, based on California Department of Fish and Wildlife (2015). Southern sea otters appear to have slightly larger skulls than northern sea otters, which contradicts the findings of Timm-Davis et al. Adult sea otters may eat as much as 9 kg (20 lbs.) Prices and download plans . Management and Protection In the United States. They are the largest member of the Mustelidae family, which also includes weasels, ferrets, and badgers. It makes its home in a burrow near the water's edge, and can thrive in river, lake, swamp, or estuary ecosystems. In the 1960s, more than 400 Northern Sea Otters were translocated around the Alaskan coast to support survival leading to population and range expansion. ableT 1. Adult males weight between 22 and 45 kilograms and measure from 1.2 to 1.5 meters.On the other hand the adult females usually weigh between 14 and 33 kilograms, and their length varies from 1 to 1.4 meters.. However, crabs make up a larger portion of sea otter diet in some parts of Alaska than in California and may therefore have a greater impact per otter (Garshelis et al., 1986). The northern sea otter is protected from hunting and harassment by the Marine Mammal Protection Act of 1972. Waved lines represent the harvest area. Sea otters are a keystone species and play a critical role in the food web of the kelp forest, so much so that even terrestrial species are influenced by sea otter activity. Whereas a female southern sea otter grows up to 50 pounds, a female northern sea otter can weigh up to 70 pounds. Physical Characteristics. Sea otters in captivity will consume up to 25% of their body weight per day. otter sea otter northern sea otter Alaska nature wildlife Teklanika Teklanika Photography. The Tlingit [46-48], the Nootka [50], the Coast Salish [52], the Kwakiutl [38], the Haida [61], and the central and northern Nootka [66] traded sea otter furs. Sea otters have not recolonized all former habitats, though their current distribution is considered stable (USFWS 2013b; Ballachey and Bodkin 2015). - "Sea otters (enhydra lutris) from the northern and southern populations may find each other in Humboldt County, California" In a study done in Alaska, it was found that the most common age range was pups (0-1 years of age) as shown in figure 3. Alaskan or Northern Sea Otter (Enhydra lutris) Photography Art Prints starting at $59.00 on Fuji Pearl, Luster Fine Art Paper, Satin MetalPrint, High Gloss MetalPrint, Canvas Gallery Wraps. The Tsimshian sea otter … Estimates of sea otter population size from western Prince William Sound, Alaska, 1993–2009, based on aerial surveys methods of Bodkin and Udevitz Sign in Sign up for FREE Prices and download plans Sea otter fur is the densest of any mammal at about 1 million hairs per square inch (We have 100,000 hairs on our entire head). The facial structure and skull shape are different between the two, Gagne says. Average weight of an adult female California sea otter is about 50 lbs. This information shows that the sea otter exhibits type 2 … PDF | The northern sea otter inhabits coastal waters of the northern Pacific Ocean and is the largest member of the Mustelidae family. When sea otter populations are healthy, urchin populations are kept in check, and kelp is abundant. The southern sea otter is smaller than its similar counterpart, the northern sea otter. In 2004, USFWS proposed listing the southwest Alaska northern sea otter under the ESA, and in 2005, the population was listed as threatened. : You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. 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