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US Fish & Wildlife Service Designates Critical Habitat for Threatened Population of Sea Otters


The U.S. Fish and Wildlife Service announced Oct. 7 the designation of critical habitat for the southwest Alaska Distinct Population Segment of the northern sea otter (Enhydra lutris kenyoni) under the Endangered Species Act of 1973, as amended. In December 2008, we proposed designating approximately 5,900 square miles of nearshore, marine waters as critical habitat for this threatened population of sea otters. An economic analysis indicated that designation of critical habitat would not result in a large economic impact to residents of southwest Alaska

After consideration of the economic analysis, public comments submitted in writing and at one public hearing, the final designation is essentially unchanged from what we originally proposed

Critical habitat designation identifies geographic areas that contain the specific habitat elements essential for the conservation of the species. The designation has no influence on private land unless proposed activities there are federally permitted or funded. The physical and biological features believed to be essential to sea otter conservation are those that provide cover and shelter from marine predators, especially killer whales. These areas primarily consist of shallow (less than 20 meters deep), nearshore (within 100 meters of the mean tide line) waters

Federal agencies that undertake, fund, or permit activities that may affect sea otters are required to consult with the Service to ensure such actions do not pose a risk to the population, or adversely modify or destroy designated critical habitat. The designation of critical habitat does not affect land ownership or establish a refuge, wilderness, reserve, preserve, or other conservation area. It does not allow government or public access to private lands or limit public access to public or private lands and waters

The Service does not anticipate that designation of critical habitat for the southwest Alaska DPS of the northern sea otter will result in any closure of commercial fishing in southwest Alaska. Sea otters eat primarily benthic (bottom-dwelling) invertebrates; for example, in the Aleutians their diet consists mostly of sea urchins, crabs, octopus, and some bottom fishes. Because of their dependence on benthic prey items, sea otters spend the vast majority of their time in shallow water, typically close to the shore, and this preference is reflected in those areas proposed for critical habitat designation. The Service recently worked with the Alaska Department of Fish and Game to analyze that agency's commercial fishing database. The results indicated that the species which otters most often prey upon are of little or no commercial interest. In addition, the areas proposed as critical habitat, as described above, are not areas where significant commercial fishing occurs

Sea otters are members of the weasel family (Mustelidae) and live in the nearshore waters along the North Pacific Ocean. They are the smallest marine mammals, and are most closely related to river otters

Historically, sea otters occurred in near shore waters around the North Pacific rim from Hokkaido, Japan through the marine coastal areas of the Russian Far East and the Pacific coastal areas in the United States as far south as Baja California. The world-wide sea otter population was reduced to just a few hundred animals between 1742 and 1911, due to commercial harvest by the Russian and Russian/American fur trades. Three populations of sea otters exist in Alaska today, of which only the southwest Alaska DPS is listed as threatened. The statewide population is believed to number around 70,000 animals

The mission of the U.S. Fish and Wildlife Service is working with others to conserve, protect and enhance fish, wildlife, plants, and their habitats for the continuing benefit of the American people. We are both a leader and trusted partner in fish and wildlife conservation, known for our scientific excellence, stewardship of lands and natural resources, dedicated professionals, and commitment to public service

For more information on our work and the people who make it happen, visit www.fws.gov

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