sea otter population 2018
On the cover: photo of Otter with sea urchins by Neil Fisher, otter group by Roy Toft; background by Joe Rocchio. survey of the sea otter population at San Nicolas Island was completed earlier (April 15–18). 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). Survey viewing conditions were very good (View Score = 3.0). Lower urchin density reduces grazing pressure on kelps, resulting in a more diverse nearshore ecosystem (Estes and Duggins 1995). This report should be cited as Sato, C. L. 2018. Measures of effective population size in sea otters reveal special considerations for wide-ranging species Evol Appl. In an interview with Anchorage Daily News in 2018, Jim Estes, an ecology professor and otter expert at the University of California, Santa Cruz said about the increasing population of sea otters in Southeast Alaska, “I think what we’re headed toward is a return to normality.” He was referring to returning to an ecosystem that includes sea otters. The southern sea otter population, which once numbered about 16,000 animals, is hovering around 3,000 today. 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! Sea Otters 10.31.2018; Otters win again. Published online 2018 May 17. D. istribution of sea otters (Enhydra lutris nereis) along the mainland coast of central California and at San Nicolas Island, 2018. ... 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. Today’s otters are descended from about 400 animals (from the Aleutians) reintroduced to the region in the 1960’s. The US supreme court declines a petition to reconsider a ruling by the ninth circuit court of appeal to reinstate a no otter zone that stretched from Point Conception south to the Mexican border. Exhibit 2: Southern Sea Otter Population Trends and Range (Photo by patrickmoody / Flickr) Kayla Desroches/KMXT. In 2005, the U.S. The population decline likely began in the mid-1980s and declined at a rate of 17.5%/year in the 1990s. The sea otter population in Morro Bay is healthy even as the Central Coast has seen more otter deaths from shark bites. Once containing more than half of the world’s sea otters, this population segment, which ranges from Kodiak Island through the western Aleutian Islands, has undergone an overall population decline of at least 55–67 percent since the mid-1980s. For example, when sea otters are present in rocky habitats, they eat sea urchins and urchin density decreases as a result. That’s how the director of the Monterey Otter Project describes it. Periodic Status Review for the Sea Otter in Washington. 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 "More than any other nonhuman species, it was the sea otter that defined the world's largest oceanscape prior to the California gold rush. coastal areas and impede the recovery of critical sea otter populations. 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 SEA OTTERS The sea otter (Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean. Commission Reports and Publications. Washington Department of Fish and Wildlife, Olympia, Washington. Sea Otter Awareness Week is this Sept. 23-29. 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