The southern sea otter population has plateaued in recent years (Tinker and Hatfield, 2018) and natural range expansion is currently restricted by the distribution of kelp forests due to increased predation on otters in areas with low kelp cover (Moxley et al., 2019; Nicholson et al., 2018). For example, when sea otters are present in rocky habitats, they eat sea urchins and urchin density decreases as a result. This report should be cited as Sato, C. L. 2018. THE SEA OTTERS The sea otter (Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean. 2018 May 17;11(10):1779-1790. doi: 10.1111/eva.12642. eCollection 2018 Dec. Therefore, it seems unlikely to have an impact on Dungeness crab abundance in the near term. State leaders are seeking leeway in the federal protection of sea otters in order to manage the predation of shellfish, but at least one Alaska Native group thinks the sea otter population should remain a federal concern. ABSTRACT Sea otter populations in Southeast Alaska, USA, have increased dramatically from just over 400 translocatedanimals inthelate 1960s to >8,000 by2003. "More than any other nonhuman species, it was the sea otter that defined the world's largest oceanscape prior to the California gold rush. My aims for this analysis were to investigate any changes that occurred in the kelp forest ecosystem surrounding San Nicolas island during the length of the sea otter translocation program. Tuesday, May 8, 2018. Established in 1964, the IUCN Red List of Threatened Species has evolved to become the world’s most comprehensive information source on the global conservation status of animal, fungi and plant species. The sea otter population in Morro Bay is healthy even as the Central Coast has seen more otter deaths from shark bites. The northern range was not calculated because of limitations in survey resources required to survey areas north of the range from the previous year (2018); however, the southern range expanded slightly by 0.5 kilometer, where a negligible trend in sea otter counts (0.55 percent growth per year) corresponded to the lack of meaningful population range expansion at the southern periphery. survey of the sea otter population at San Nicolas Island was completed earlier (April 15–18). Unlike most marine mammals, the sea otter's primary form of … This work was supported in part by personalized and endangered species license plates. 23+iii pp. Sea otters spend much of their lives in the water and can dive up to 330 feet when foraging for food, though most dives are much shallower. Posted by Joe Viechnicki | Jan 15, 2018. The 3-year average of combined counts from the mainland range and San Nicolas Island was 3,128, a decrease of 58 sea otters from the previous year. Sea otters in Alaska. Survey viewing conditions were very good (View Score = 3.0). This weekend (September 29-30 2018), the Seattle Aquarium will be hosting a few events where you can learn from experts about sea otters and even see an enrichment demonstration! To learn more, click here to go to their site. Today’s otters are descended from about 400 animals (from the Aleutians) reintroduced to the region in the 1960’s. In 2005, the U.S. California Sea Otter (Enhydra lutris nereis) Census Results, Spring 2019 By Brian B. Hatfield, Julie L. Yee, Michael C. Kenner, and Joseph A. Tomoleoni Abstract The 2019 census of southern sea otters (Enhydra lutris nereis), also known as California sea otters, was conducted from early May to early July along the mainland coast of (Photo courtesy of Matt Lichtenstein) Crabbers and dive fishermen returned to Alaska’s Board of Fish this month seeking changes to commercial fishing regulations in Southeast Alaska for crab and other shellfish impacted by a growing population of sea otters in the region. (Photo by patrickmoody / Flickr) Kayla Desroches/KMXT. Surface kelp canopies at the time of survey at San Nicolas Island were estimated to be below normal near shore off the western end of the island and about normal elsewhere. The Commission expects to review updated stock assessment reports for the three northern sea otter stocks in 2018. The 5-year average trend in … D. istribution of sea otters (Enhydra lutris nereis) along the mainland coast of central California and at San Nicolas Island, 2018. Plus, you can also see sea otters at the Oregon Zoo and Vancouver Aquarium! Sato, C. L. 2018. The 2018 census of southern sea otters (Enhydra lutris nereis) was conducted from late April to mid-May along the mainland coast of central California and in April at San Nicolas Island in southern California. The 2018 census of southern sea otters (Enhydra lutris nereis) was conducted from late April to mid-May along the mainland coast of central California and in April at San Nicolas Island in southern California. These threats have grown, even though from 2016 to 2018, the average population size reached a level that could have triggered a review for possible removal of the species from the ESA list. Lower urchin density reduces grazing pressure on kelps, resulting in a more diverse nearshore ecosystem (Estes and Duggins 1995). SANTA CRUZ, Calif.— Southern sea otter numbers have declined off the coast of California since peaking in 2016, but the average population count remains above 3,090 for the third consecutive year. Exhibit 2: Southern Sea Otter Population Trends and Range The minimal population estimate was 8,742 sea otters in 2000. More information: Roderick B. Gagne et al, Measures of effective population size in sea otters reveal special considerations for wide-ranging species, Evolutionary Applications (2018). Commission Reports and Publications. According to data just released by the California Department of Fish and Wildlife (CDFW) and U.S. Geological Survey (USGS), the three-year average population index this year dropped to 2,962, which is 166 sea otters fewer than the 2018 survey. Commission Letters. Southern sea otter distribution Current extent of established range 1 extralimital sea otter Area of map A OREGON NEVADA O N Figure 1. Sea otter numbers have declined in southwestern Alaska over the past 20 years. The 3-year average of combined counts from the mainland range and San Nicolas Island was 3,128, a decrease of 58 sea otters from the previous year. On the cover: photo of Otter with sea urchins by Neil Fisher, otter group by Roy Toft; background by Joe Rocchio. ... Should the northern and southern sea otter populations eventually merge, it would increase the genetic diversity of the CA population, potentially improving health and increasing adaptive potential. Adult sea otters typically weigh between 14 and 45 kg (31 and 99 lb), making them the heaviest members of the weasel family, but among the smallest marine mammals. Periodic Status Review for the Sea Otter in Washington. Southeast fishermen seek relief from expanding sea otter population January 15, 2018 by Joe Viechnicki, KFSK-Petersburg Sea otters raft up in the inside waters of Southeast Alaska in June 2014. The population declined to a uniformly low density in the archipelago, suggesting a common and geographically widespread cause. Measures of effective population size in sea otters reveal special considerations for wide-ranging species Evol Appl. by USFWS | Sep 25, 2018 | sea otters. The population decline likely began in the mid-1980s and declined at a rate of 17.5%/year in the 1990s. 23+iii pp. The sea otter (Enhydra lutris) was nearly driven to extinction on the Pacific Coast in the 19th century due to intensive commercial hunting and the maritime fur trade. The southern sea otter population, which once numbered about 16,000 animals, is hovering around 3,000 today. Washington Department of Fish and Wildlife, Olympia, Washington. SANTA CRUZ, Calif.— Southern sea otter numbers have declined off the coast of California since their most recent high in 2016. Sea Otters 10.31.2018; Otters win again. Evol Appl. Sea Otter Awareness Week is this Sept. 23-29. Population. 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