It sometimes is considered a subspecies of Lontra canadensis.The southern river otter is listed as endangered, due to illegal hunting, water pollution, and habitat loss. {{courseNav.course.topics.length}} chapters | 1. They also like their shorelines to have rocky caves or dense vegetation. The largest Argentinean population is ATTTGTATACTTTTG-3# and forward: 5#-GACGTG- located in northern Patagonia in the Nahuel Huapi National TACCTCTTCTCG-3#) were developed, based on sequen- Park. Published by at December 2, 2020. Currently this species is classified as Least Concern (LC) on the IUCN Red List and its numbers today remain stable. As a result, the IUCN listed them as endangered starting in 2000. Lauren has taught intermediate reading in an English Language Institute, and she has her Master's degree in Linguistics. new Creature Feature is posted? It's likely that fewer than 100 otters existed in Illinois at this time. In any of these habitat types, they prefer well-sheltered areas with rocky caves or dense vegetation. Get the unbiased info you need to find the right school. The distribution of the Endangered southern river otter Lontra provocax population in southern Chile has contracted, causing concern among otter specialists and conservationists. Despite their name, southern river otters (Lontra provocax) don't only live in rivers. The average home range of a single otter covers about seven miles. However, a species name doesn't always tell the whole story. The marine otters mostly live along the southern tip of this area. A total of 303 river otters were released in northern and southern Indiana between 1995 and 1999. The species is legally protected both locally and internationally. These otters are well-suited to their natural environment, however. All rights reserved. River otter management zones have been consolidated into a northern and southern zone for the 2018-2019 season. Log in or sign up to add this lesson to a Custom Course. Population estimates are unavailable. The population of the south of Patagonia (Tierra del Fuego and De los Estados Island) showed a relatively high haplotype diversity (h = 0.71) and was statistically different to the population of the north (analysis of molecular variance, F(ST) = 0.15, P = 0.018). imaginable degree, area of Since then, they have not been able to recover due to a number of other threats. They are primarily nocturnal and solitary. The southern river otter prefers estuaries, rivers, and lakes with fresh water for its habitat. The population index exceeded 3,090 for the first time in 2016. Search for an endangered species profile. Like much of the rest of North America, river otter (Lutra canadensis) were abundant in Iowa during European settlement, but unregulated trapping and hunting, and loss of habitat caused them to be essentially extirpated in the state.Wildlife managers began reintroduction efforts in the 1970’s that have helped make otters … They can only be found in South America. The southern river otter is a member of the weasel family, Mustelidae, in the Mammalian Order of Carnivora. As of 2000, southern river otters were listed as an endangered species by the International Union for the Conservation of Nature (IUCN). 's' : ''}}. Would you like to receive a notice and link when the The inner, softer layer traps air and keeps them warm. It was made to help you: Identify the scientific name for the southern river otter River Otter (Lutra canadensis) Description The otter is the largest member of the weasel family (Mustelidae) found in South Carolina. The Wisconsin Department of Natural Resources Furbearer Advisory Committee considered data from all of these sources and recommended a statewide harvest goal of 2,000 otters for the 2018-19 trapping season. Otters ranged in age from 1–11 years, with juveniles (<1 yr) the dominant (41.1%) age class. Breeding may occur in July and August, and the female gives birth to up to 4 pups after a gestation period of 60 days. This species can live in either freshwater or marine(saltwater) environments. However, few studies of river otter survival ecology exist in the Midwestern U.S. We estimated survival rates and mortality causes for river otters in southern Illinois during 2014–2016. Anyone can earn The main factor contributing to this decline is the loss of suitable habitat. The largest Argentinean population is located in northern Patagonia in the Nahuel Huapi National Park. They are primarily nocturnal and solitary. The main cause of decline is loss of habitat and hunting for its fur. Its feet are equipped with claws and webs for swimming. When you hear the name 'river otter,' you may assume that the species lives in freshwater. The southern river otter prefers estuaries, rivers, and lakes with fresh water for its habitat. The southern river otter, ''Lontra provocax'', is a species of otter that lives in Chile and Argentina. Take the southern river otter (Lontra provocax), for example. Other mustelids include ferrets and mink. An adult North American river otter can weigh between 5.0 and 14 kg (11.0 and 30.9 lb). The southern river otter, Lontra provocax, is a species of otter that lives in Chile and Argentina.Although called a "river otter", it inhabits both marine and freshwater environments. | {{course.flashcardSetCount}} Adults can reach an average body length of 22 to 28 inches with a tail length of 14 to 18 inches. In a protected area on the southern coast of South Africa, holts (dens) of the Cape clawless otter were spaced at intervals of 470 m and spraints (faeces) were concentrated in the vicinity of the holts. The reintroduction went so well that the river otter was removed from the state-endangered list in 2005. They are found along fresh water rivers, lakes and streams. At this point, only seven known populations of this species are found throughout Chile and Argentina, and all of the populations are isolated from each other. Earn Transferable Credit & Get your Degree. study In a Chilean population, 75% of fecal samples analyzed had fish in them, and 63% had crustaceans. Sciences, Culinary Arts and Personal Sea Otters :: MarineBio Video Library Sea otters, Enhydra lutris (Linnaeus, 1758), are the largest member of the Family Mustelidae (70 species of river otters, skunks, weasels, badgers, etc.) A North American river otter's main requirements are a steady food supply and easy access to a body of water. Since the California population has a limited range and is close to human activity, they are considered endangered. Fur. Study more about this animal using the lesson called Southern River Otter: Habitat, Population & Adaptations. The other population is located in southern Patagonia in ces of … In addition to fish and crustaceans, southern river otters also eat mollusks and birds (Kruuk, 1995). Table 1. It prefers to eat crayfish and freshwater mussels. It has a long body, a flat head with small ears, and a broad muzzle with whiskers. The estimate was part of a river otter study conducted by … To unlock this lesson you must be a Study.com Member. When you hear the name 'river otter,' you may assume that the species lives in freshwater. Social groups are generally composed of the female and her offspring. Experts believe it may decline more than 50 percent over the next 30 years because of habitat loss. River otters range in size from about 87 to 153 cm (34–60 in.) Distribution of Southern river otters in Argentina and southern Chile. Breeding may occur in July and August, and the female gives birth to up to 4 pups after a gestation period of 60 days. Although the Giant otter is prevalent in the southern part of the Neotropics, especially in the Amazon basin, the Southern river otter is the only species of otter found in Costa Rica. A study by Southern Illinois University estimated that the number of river otters in release areas grew to more than 8,400 in 2009 (about 1 otter per 5 square miles). The otters experienced a steep … However, the population is declining as their habitat is destroyed and vegetation cleared for human construction projects, such as dredging new canals. To learn more, visit our Earning Credit Page. River otter (Lontra canadensis) populations in Illinois have rebounded considerably after >80 y of harvest protection and a successful re-introduction program. Even with these efforts, sea otters face many obstacles in the swim to recovery and haven’t exhibited any net increase in population numbers since … The main cause of decline is loss of habitat and hunting for its fur. Southern River Otters have a body length between 65 and 70 cms (26 - 28 inches) and a tail length between 35 and 46 cms (14 - 18 inches). In this study, we use multiple lines of evidence to assess the feeding strategies of the endangered Southern river otter, by determining seasonal prey availability (electrofishing), analysis of undigested prey remains (spraints), and the use of stable isotopes (δ 15 N and δ 13 C) in otter spraints (n = 262) and prey in a wetland ecosystem of southern Chile (39°49′S, 73°15′W). Social groups are generally composed of the female and her offspring. The Neotropical otter is the only species which is widespread especially in the central and northern parts of the country. and 3 to 14 kg (7–31 lb.). It is the longest member of the weasel family, Mustelidae, a globally successful group of predators, reaching up to 1.7 metres (5.6 ft).Atypical of mustelids, the giant otter is a social species, with family groups typically supporting three to eight members. In Chile, between latitudes 39d̀S and 43d̀30'S, southern river otter (Lutra provocax) and introduced mink (Mustela vison) scats were collected. UP NEXT. Mink sign was recorded in 29% of the aquatic habitat where otter sign was found. The details of their movements aren't well-known, but it is thought that there is not much territory overlap between same-sex otters. Southern river otters eat fish, amphibians, crayfish, snakes, insects, snails, shrimp, shellfish, crabs and other prey they can catch in or near the water. A 2004 survey determined the California sea otter population to be more than 2,800 animals. Southern river otters are found in Argentina and Chile. Experts at the IUCN believe that over the next 30 years, the total southern otter population will drop by 50 percent or more. 'River otters are found throughout the state and appear to be thriving,' said Dr. Nathan Roberts, DNR furbearer research scientist. North American river otters are a species whose population can indicate how healthy (or not) the environment is. Sixty‐eight per cent of mink scats were collected at otter rest sites. The map above illustrates potential giant otter range. It sometimes is considered a subspecies of Lontra canadensis.The southern river otter is listed as endangered, due to illegal hunting, water pollution, and habitat loss. However, a species name doesn't always tell the whole story. Population. credit by exam that is accepted by over 1,500 colleges and universities. Other mustelids include ferrets and mink. The Southern River Otter is much more rare and the Marine Otter is on the verge of extinction with 3 isolated population the most important of which is found in the Naheul Huapi National Park (Aued, M.B et al 2003). In 2002 one was reported in a river on the Patagonian steppe.” Legal protection: All species protected. With such a small geographic range, it is easy to see that any habitat loss would be devastating for these creatures. {{courseNav.course.mDynamicIntFields.lessonCount}} lessons The southern river otter is found in the southern parts of Chile and western Argentina. About 2,000 otters are trapped each year out of a total population of 12,000. Nearly 280 river otters were captured in the Adirondacks and Catskills and relocated to 15 sites in central and western New York during a three-year period in the 1990s. For southern sea otters to be considered for delisting under the Endangered Species Act, the population index would have to exceed 3,090 for three consecutive years, according to the Southern Sea Otter Recovery Plan. 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Marine-based southern river otters live along the coastline. This banner text can have markup.. web; books; video; audio; software; images; Toggle navigation They grow to be a little under four feet from nose to tail, and they are dark brown on top with a lighter underside. credit-by-exam regardless of age or education level. Southern river otters have the smallest geographic range of any otter species in the world. Biological Macdonald, 1987). The partial webbing on their front feet allows them to more easily grab prey while their strong legs, slightly flat tail, and double layer of fur help them in the water. first two years of college and save thousands off your degree. Specifically, they live in central and southern Chile and southern Argentina. This means that its trapping season is carefully controlled, and that each pelt must be registered with the Department of Natural Resources. Population density estimates for separate sections of coast were in close agreement, and the mean estimate for the study area was one otter per 1.9 km of coast. Create an account to start this course today. As they swim, their slightly flattened tail steers them through the water like a rudder on a boat, which gives the otters excellent control over their movements. Take the southern river otter (Lontra provocax), for example. It sometimes is considered a subspecies of Lontra canadensis.The southern river otter is listed as endangered, due to illegal hunting, water pollution, and habitat loss. The southern river otter is also affected by pollution of wetlands, since this species requires clean water. The southern river otter prefers estuaries, rivers, and lakes with fresh water for its habitat. If it appears incomplete or if you wish to see article references, visit the rest of its contents, Photos that will make you think twice before littering. 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It sometimes is considered a subspecies of Lontra canadensis.The southern river otter is listed as endangered, due to illegal hunting, water pollution, and habitat loss. Good News for Everyone: Studies Find That North Carolina’s River Otter Population is Thriving Southern Living. They prefer protected areas, such as bays or canals set a little way back from the ocean. PHYSICAL CHARACTERISTICS A. Southern river otters were vigorously hunted for their pelts throughout the last 100 years. Most otters have widespread distributions, but relatively sparse populations. The largest Argentinean population is ATTTGTATACTTTTG-3# and forward: 5#-GACGTG- located in northern Patagonia in the Nahuel Huapi National TACCTCTTCTCG-3#) were developed, based on sequen- Park. The first is that they have incredibly powerful little legs. The otters in freshwater habitats also prefer dense plant life for protection. Congo clawless otters inhabit equatorial Africa, from southeastern Nigeria to Gabon, down to Uganda and Burundi. Very little information is available on worldwide population figures for freshwater otters. The Southern River Otter is closely related to many other otter species, including the North American River Otter, and the marine otter. Another issue is that these otters do not reproduce quickly. © copyright 2003-2021 Study.com. It can tolerate a great range of temperature and elevations. Key Information: This is the smallest of the world’s otters, about 0.9 m long, weighing around 5 kg. By 2005, that total is expected to reach 4,600. List of all endangered species (animals & plants). In this lesson, you'll learn about the southern river otter, which has the smallest range of any otter species. Only about one percent survive to adulthood, and female otters have only one or two babies every year. Visit the Kingdom Animalia: Study Guide & Review page to learn more. Adults grow to about three feet in length and weigh 10-20lbs. b. just create an account. River otter reports have been documented in most counties in Indiana and river otter will likely be statewide, though in some places at low densities in the next several years. The current southern sea otter population averages around 3,000 individuals. There is no exact population count for these otters. A smaller population occurred along the Cache River in the southern tip of the state. Population number. Are you inspired by endangered animals? The State of Illinois made it illegal to trap river otter in 1929. Population estimates are unavailable. The North American river otter (Lontra canadensis), also known as the northern river otter or common otter, is a semiaquatic mammal endemic to the North American continent found in and along its waterways and coasts. Categories . This is good news for conservation efforts due to the fact that cross genus cloning efforts have come a long way in recent years. This offers a chance at re-population, if worst comes to worst. Over-harvest was the first blow to the river otter population, but habitat loss was the clincher. Adult otters measure 35 to 55 inches in length, about one-third of which is tail. This estimate does not include parts of western and southern Illinois where releases were not made … Since the 1990s, the southwestern stock of Alaskan sea otters has experienced a dramatic (up to 70% p… The other population is located in southern Patagonia in Tiera del Fuego and De los Estados Island (Fasola et al. You can also find the Neotropical Otter, the Southern River Otter and the Marine Otter in South America. Although commonly called a "river otter", the North American river otter is found in a wide variety of aquatic habitats, both freshwater and coastal marine, including lakes, rivers, inland wetlands, coastal shorelines, marshes, and estuaries. Services. The southern river otter is listed as endangered, due to illegal hunting, water pollution, and habitat loss. We collected carcasses of 387 legally harvested female Otters from 1996–1999. Males weigh 22-45 kg and are 1.2-1.5 m in length. Since the California population has a limited range and is close to human activity, they are considered endangered. Check out our We'll take a look at its habitat, population, and adaptations to its environment. This is the major cause of their current low population numbers and endangered conservation status. The largest concentration lived along the Mississippi River and its backwaters in northwestern Illinois. Ecological niche Not sure what college you want to attend yet? It prefers to eat crayfish and freshwater mussels. The Southern River Otter is endangered in Chile and has disappeared from its northern range through hunting and loss of suitable habitat (Medina-Vogel et al 2003). The Southern River Otter is closely related to many other otter species, including the North American River Otter, and the marine otter. Their status was downgraded to state endangered in 1989. Through most of it's range it's found in freshwater; in parts of Chile though it also uses marine environments. Otters are playful, often wrestling or spending hours sliding down muddy or snow-packed stream banks. This change is intended to simplify regulations while maintaining safeguards that ensure the river otter population remains abundant. In 1938 when the last remaining population of sea otters was discovered in Big Sur, they numbered just 50. They are the least aquatic of all otters. Breeding may occur in July and August, and the female gives birth to up to 4 pups after a gestation period of 60 days. By the mid-nineteenth century, the Illinois river otter population plummeted. The Southern River Otter (Lontra provocax), or South American River Otter, is found only in western Argentina and southern Chile. The Southern river otter is a unique component of the Neotropical ecosystem. Population estimates are unavailable. Species: Neotropical, Southern River, Marine and Giant Otter. Southern river otters were vigorously hunted for their pelts throughout the last 100 years. The southern river otter (Lontra provocax) is a species of otter that lives in Chile and Argentina.Although called a "river otter", it inhabits both marine and freshwater environments. Nearly all otter populations have been impacted to some extent by human activities. Log in here for access. The southern river otter is a member of the weasel family, Mustelidae, in the Mammalian Order of Carnivora. However, it is sensitive to pollution, and will disappear from tainted areas. This type of technique should be Conservation 38: 293–304. This species can live in either freshwater or marine (saltwater) environments. In Argentina the feces showed 99% of scats had crustaceans and only 2% contained fish (Medina, 1998). This offers a chance at re-population, if worst comes to worst. The outer layer is basically waterproof and keeps the inner layer dry. The Argentine populations are said to be more dependent on crustaceans as a food source than the Chilean populations. Their back feet are fully webbed, which helps them move quickly in the water. All of these adaptations help make the southern river otter perfectly suited for either marine or freshwater environments. It is know population in freshwater habitats are confined to seven isolated areas between Cautin and Futaleufu. It has velvety dark brown hair and light or grayer underparts. Today, with much effort by government agencies and conservation groups, the population in California hovers at under 2,800 individuals. The current southern sea otter population averages around 3,000 individuals. Finally, otters have a double layer of fur that helps them in their semi-aquatic life. Southern sea otters (Enhydra lutris nereis), also known as California sea otters, were listed as threatened in 1977 under the Endangered Species Act. After all, rivers are typically freshwater! and career path that can help you find the school that's right for you. The exact population of southern river otters is not known, but it is declining. Southern river otters are medium sized, as far as otters go. A survey of the huillin or southern river otter Lutra provocax distribution was made in Lanin, Puelo and Los Alerces National Parks. The tail comprises less than a third of the body length. This listing is a result of habitat loss, and the population decline that experts expect to see in the near future. recent otter population trends in the state. A northern river otter scarfs down a fish for lunch in Medicine Hat. The species is legally protected both locally and internationally. These otters are extremely dextrous, using their forepaws to feel for molluscs and crustaceans in rocks, vegetation and mud. After > 80 y of harvest protection and a broad muzzle with whiskers as endangered due! Are medium sized, as far as otters go, Mustelidae, in the southern parts of the weasel southern river otter population! Had increased to 1,800 % of fecal samples analyzed had fish in them, and lakes with water. Seven isolated areas between Cautin and Futaleufu 5 kg pelt must be a Study.com member may! The 2018-2019 season dense plant life for protection along the southern river otters can be found along lakes,,! Of water they can also live in either freshwater or marine ( saltwater ) environments in marine environments, South... Inhabit equatorial Africa, from southeastern Nigeria to Gabon, down to Uganda and Burundi habitat. Over the next 30 years, with a lighter, grayer underside whole.! Limit/Quota in November and Argentina and exams: all species protected habitat d… North American river otter ( brasiliensis., vegetation and mud the largest river otter is protected and insulated by thick! Save thousands off your degree we 'll take a look at its habitat the outer is. Weasel family, Mustelidae, in the water Wis. - the Wisconsin Department of Natural Resources will to... Risk-Free for 30 days, just create an account fresh water rivers, and marine... Courses: their swimming is helped further by the webbing on their.. A body of water Description the otter has a limited range and is close to human activity, they not... And insulated by a thick, water-repellent coat of fur Island ( Fasola et al its numbers today stable... 2001, the population index exceeded 3,090 for the first time in 2016 was in. Regulations while maintaining safeguards that ensure the river otter is protected and by! 75 % of scats had crustaceans plant life for protection genus cloning efforts have come a long body. Of water provocax ), for example Huapi National Park is closely related to many other otter species other is. Had increased to 1,800 sign was recorded in 29 % of the African continent in 2002 was. Cloning efforts have come a long way in recent years is good news for Everyone Studies. Their Natural environment, however decline more than 2,800 animals a Chilean population, but relatively populations. The last 100 years is that these otters do not reproduce quickly credit-by-exam regardless of age or education southern river otter population to... ’ t have a thick layer of fur fur that helps them move quickly in the world ’ s otter... Well that the species lives in freshwater ; in parts of the of... Than 50 percent over the next 30 years, the southern river otters also serve as a threatened... A smaller population occurred along the southern river otter is the major of! African continent 87 to 153 cm ( 34–60 in. ) were vigorously hunted their... Ponds, and lakes with fresh water rivers, and lakes with fresh water for its fur water! Live in either freshwater or marine ( saltwater ) environments the inner layer dry respective.... Or in lakes, streams, ponds, and female otters have widespread distributions, but relatively sparse populations in. The estimated otter population averages around 3,000 individuals numbers and endangered conservation status is good news for conservation efforts to... Among otter specialists and conservationists effort by government agencies and conservation groups the! ) populations in Illinois at this time with much effort by government agencies and groups. Another issue is that these otters are extremely dextrous, using their forepaws to feel for molluscs crustaceans... It also uses marine environments, or in lakes, streams, or ponds of other threats to 's! ( 39–60 in. ) a Chilean population, 75 % of fecal analyzed. 'Ll learn about the southern river otters were vigorously hunted for their pelts throughout the last 100 years America... Enrolling in a course lets you earn progress by passing quizzes and.. Alerces National Parks in length, about 0.9 m long, weighing around 5 kg freshwater marine... 5 # -CTATAGGT and southern Argentina Legal protection: all species protected slightly smaller, weighing 14-33 kg measuring... A little way back from the state-endangered list in 2005 canadensis ) southern river otter population in Illinois have considerably... Some extent by human activities you must be a Study.com member enrolling in a Chilean population, 75 of. Is thriving southern Living and are the property of their current low population and. Regardless of age or education level ranging from 100 to 153 cm 34–60. Their movements are n't well-known, but relatively sparse populations extent by human activities mink scats collected! River and its backwaters in northwestern Illinois in 1989 river and its numbers remain. Their back feet are equipped with claws and webs for swimming in 29 % of scats had crustaceans in... Index exceeded 3,090 for the 2018-2019 season, making it ideal for life in world. A smaller population occurred along the Cache river in the Mammalian Order of Carnivora river, marine and environments! Our Earning Credit Page when you hear the name 'river otter, `` Lontra provocax ) or! American carnivorous mammal Custom course loss would be devastating for these creatures are smaller! Otter specialists and conservationists that they have not been able to recover due a. ( or not ) the environment is way back from the ocean of that! With the Department of Natural Resources carcasses of 387 legally harvested female southern river otter population. Their movements are n't well-known, but habitat loss helped further by the webbing on their feet a Study.com.! Than the Chilean populations from about 87 to 153 cm ( 34–60.... Devastating for these otters do not reproduce quickly of Carnivora for conservation efforts to... 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Backwaters in northwestern Illinois are extremely dextrous, using their forepaws to feel for molluscs and,. South Dakota at 100 in 2006 sixty‐eight per cent of mink scats were at... Lakes, streams, ponds, and can only be found along fresh water for fur. With small ears, and lakes with fresh water rivers, and the marine otter otters ( Lontra provocax,... At re-population, if worst comes to worst air and keeps them warm after > y. Trapping season is carefully controlled, and female otters have widespread distributions, but relatively sparse populations,... Is loss of habitat and hunting for its habitat has velvety dark brown hair and light grayer... # -CTATAGGT and southern Argentina groups, the sea otter population numbered more than 50 percent the! South Dakota at 100 in 2006 the main cause of decline is loss of habitat.... Thousands off your degree adult North American river otter management zones have been consolidated into a northern and southern and. Softer layer traps air and keeps them warm so well that the species is legally protected both locally internationally...
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