Here at the Aquarium, our sea otters are southern, or California, sea otters. 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). Sea otter fur was a highly valued pelt of the European and Indigenous traders [34, 38, 46]. This represents a 22% increase in sea otter population size in this area in the 4 year period 2008 – 2012. Samples for this research were collected from the first 40 otters harvested. The U.S. Fish and Wildlife Service recovery plan uses effective population size to determine when the southern sea otter is to be delisted as a federally threatened species. The sea otter spends most of its time in the water but, in some locations, comes ashore to sleep or rest. Tables. Figure 1: Northern sea otter stock boundaries from the 2013 Southwest Alaska Distinct Population Segment of the Northern Sea Otter (Enhydra lutris kenyoni) Recovery Plan SPECIES BACKGROUND. Southern sea otters appear to have slightly larger skulls than northern sea otters, which contradicts the findings of Timm-Davis et al. ableT 1. The current distribution is marked in red, while the recent observation in Humboldt County is noted as a green dot. PDF | The northern sea otter inhabits coastal waters of the northern Pacific Ocean and is the largest member of the Mustelidae family. 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. This file is licensed under the Creative Commons Attribution 3.0 Unported license. Figure 1. Forty-one male northern sea otters were harvested from March to September 2013. 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. Physical Characteristics. It makes its home in a burrow near the water's edge, and can thrive in river, lake, swamp, or estuary ecosystems. Average weight of an adult female California sea otter is about 50 lbs. Prices and download plans . Estimates of sea otter population size from western Prince William Sound, Alaska, 1993–2009, based on aerial surveys methods of Bodkin and Udevitz Sea otters in captivity will consume up to 25% of their body weight per day. : 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. Map of the current distribution of sea otters (Enhydra lutris) in California, based on California Department of Fish and Wildlife (2015). The Tsimshian sea otter … 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 southern sea otter is smaller than its similar counterpart, the northern sea otter. Main Characteristics Of The Sea Otters Anatomy. When sea otter populations are healthy, urchin populations are kept in check, and kelp is abundant. 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. Critical habitat is habitat that is deemed essential for the conservation of a threatened (or endangered) species. 2 Category Score Biological Population Size (-10 to 10) Findings of Timm-Davis et al 9 kg ( 20 lbs. greater in relative. 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