The Basics. This is why conservation efforts are in place to help them continue to survive. The northern sea otter is native to the territories of Alaska and the northwest of the Pacific Ocean. The southern sea otter (also known as the California sea otter) is located off the coast of California and is known to have a narrow head and small teeth. National Geographic Fellow and science co-lead of the expedition Professor Heather Koldewey, of ZSL (the Zoological Society of London) and the University of Exeter, said the study's findings offer hope for solutions based on "circular economy" -- where waste is dramatically reduced by reusing materials. Otters Conservation Status. www.sciencedaily.com/releases/2020/11/201125091503.htm (accessed November 29, 2020). Ghost fishing threatens endangered river dolphins, critically endangered turtles, otters Date: November 25, 2020 Source: University of Exeter Summary: The sea otter is a well-known marine mammal with a historical range along the west coast of North America. This isn’t exclusive to sea otters alone — river otters are also known to maintain river ecosystems and a healthy fish population by eating diseased fish. Stats reveal that many otters died between years 1999-2006 of shark bites. Ghost fishing threatens endangered river dolphins, critically endangered turtles, otters. "A high proportion of the fishing gear we found was made of nylon 6, which is valuable and can be used to make products including carpets and clothing," she said. The researchers used a list of 21 river species of "conservation concern" identified by the Wildlife Institute for India. ScienceDaily shares links with sites in the. ScienceDaily, 25 November 2020. The central sea otter (also known as the Asian sea otter) is the largest of the subspecies and is found around islands in the western Pacific. Materials provided by University of Exeter. Threats Competition with commercial shellfish fisheries, entanglement in commercial fishing gear, oil spills, disease outbreaks, contaminants, subsistence harvests, killer whale predation. Or view hourly updated newsfeeds in your RSS reader: Keep up to date with the latest news from ScienceDaily via social networks: Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. They include the Southern River Otter, Hairy Nosed Otter, Giant Otter, and the India Smooth Coated Otter. Stats reveal that many otters died between years 1999-2006 of shark bites. Content on this website is for information only. By Staff Writer Last Updated Mar 29, 2020 1:41:16 PM ET. And research on and monitoring of southern sea otters … Financial support for ScienceDaily comes from advertisements and referral programs, where indicated. When they try to groom their fur by licking, they ingest the poisonous oil and die of toxicity. The main reason that these Otters were hunted though was for their fur. Historically there were about 16,000 sea otters from the Oregon-California border to Baja, Mexico. Sea otters are known to mate all year round. There are three different species of sea otter, which today are recognized as a science. After a gestation period of up to a year gives birth to a single calf, but there are reports that often these animals are born and twins. "Many held the view that the river 'cleans it away', so one useful step would be to raise awareness of the real environmental impacts.". Linda Tanner/Flickr/CC-BY-2.0. Unlike other marine mammals, the sea otter does not have a layer of fat to keep it warm, so it should rely on dense fur to protect itself from the cold. They also have a reduced population size, which puts them in danger of … The otters are listed as a threatened species under the Endangered Species Act. A sea otter resting in kelp in Monterey Bay, California. Otters Endangered. 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Rex Had Huge Growth Spurts, but Other Dinos Grew Slow and Steady, Largest Aggregation of Fishes in Abyssal Deep Sea, Very Hungry and Angry, Caterpillars Head-Butt to Get What They Want, The Secret Social Lives of Giant Poisonous Rats, Truffle Munching Wallabies Shed New Light on Forest Conservation, Geoscientists Discover Ancestral Puebloans Survived from Ice Melt in New Mexico Lava Tubes, Large Predatory Fish Thrive on WWII Shipwrecks Off North Carolina Coast. People actively hunted for the sea otters’ wool in the 18th century, which meant destructive influence for the species, and sea otters began to occur less frequently and less frequently in the natural habitat. "Ingesting plastic can harm wildlife, but our threat assessment focussed on entanglement, which is known to injure and kill a wide range of marine species.". (2020, November 25). Sea otters are a keystone species, meaning their role in their environment has a greater effect than other species. The picture of sea otters frolicking among kelp beds and rocky shoals has become an iconic image of the California coastline. The sea otters get covered from head to tail in oil which permeates into their coat that disrupts the insulation. "We demonstrated this through the Net-Works project in the Philippines, which has been so successful it has become a standalone social enterprise called COAST-4C. The trade of sea otters was continued until the animals were virtually wiped out. University of Exeter. The sea otters get covered from head to tail in oil which permeates into their coat that disrupts the insulation. It is not intended to provide medical or other professional advice. It is known that uterine sea otters feed their puppies for up to one year, and by this time the puppies can hunt and feed themselves. The trade was banned in 1910, with signing of the treaty between America, Japan, Russia and Great Britain. “For the conservation of the sea otter, this would be huge.” But there are political challenges. Many of … Sea otters today are considered a species that is endangered. ScienceDaily. The sea otter fur also consists of two layers, a waterproof layer of long protective hair with a layer of short thick fur under it. “ It would essentially end up lifting the sea otter out of its endangered species status,” said Brent Hughes, assistant professor of biology at Sonoma State and lead author of the study published in PeerJ: the Journal of Life and Environmental Sciences. People actively hunted for the sea otters’ wool in the 18th century, which meant destructive influence for the species, and sea otters began to occur less frequently and less frequently in the natural habitat. Note: Content may be edited for style and length. The study, led by researchers from the University of Exeter, with an international team including researchers from India and Bangladesh, was conducted as part of the National Geographic Society's "Sea to Source: Ganges" expedition. Many of the different species of Otters have been heavily hunted in the past. Sarah E. Nelms, Emily M. Duncan, Surshti Patel, Ruchi Badola, Sunanda Bhola, Surfarsha Chakma, Gawsia Wahidunnessa Chowdhury, Brendan J. Godley, Alifa Bintha Haque, Jeyaraj Antony Johnson, Hina Khatoon, Sumit Kumar, Imogen E. Napper, Md. Sea otters … Sea otters are listed as an endangered species because they are vulnerable to oil spills from ships and coastal tanker traffic. The northern sea otter was destroyed from the coast of British Columbia due to more active hunting, but was recently returned to the island of Vancouver. Currently, there are only 3,000 sea otters left in the wild, making them heavily endangered. Despite that, the sea otter trade still continues on the black market even today. "Ghost fishing threatens endangered river dolphins, critically endangered turtles, otters." "Ghost fishing threatens endangered river dolphins, critically endangered turtles, otters." Dr Nelms' work was partly funded by the ExeMPLaR Project, and was supported by access to the analytical facilities of the Greenpeace Research Laboratories. "The Ganges River supports some of the world's largest inland fisheries, but no research has been done to assess plastic pollution from this industry, and its impacts on wildlife," said Dr Sarah Nelms, of the Centre for Ecology and Conservation on Exeter's Penryn Campus in Cornwall. Interviews with local fishers revealed high rates of fishing equipment being discarded in the river -- driven by short gear lifespans and lack of appropriate disposal systems.
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