Breeding may occur in July and August, and the female gives birth to up to 4 pups after a gestation period of 60 days. © copyright 2003-2021 Study.com. A smaller population occurred along the Cache River in the southern tip of the state. The southern river otter is also affected by pollution of wetlands, since this species requires clean water. To learn more, visit our Earning Credit Page. It sometimes is considered a subspecies of ''Lontra canadensis''. Distribution of Southern river otters in Argentina and southern Chile. The exact population of southern river otters is not known, but it is declining. To unlock this lesson you must be a Study.com Member. This means that its trapping season is carefully controlled, and that each pelt must be registered with the Department of Natural Resources. 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. The largest river otter is the North American river otter, ranging from 100 to 153 cm (39–60 in.). They are primarily nocturnal and solitary. By the mid-nineteenth century, the Illinois river otter population plummeted. Log in here for access. After all, rivers are typically freshwater! The … 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 is good news for conservation efforts due to the fact that cross genus cloning efforts have come a long way in recent years. An adult North American river otter can weigh between 5.0 and 14 kg (11.0 and 30.9 lb). Specifically, they live in central and southern Chile and southern Argentina. 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. Unlike other marine mammals, the sea otter doesn’t have a thick layer of blubber. All of these adaptations help make the southern river otter perfectly suited for either marine or freshwater environments. The other population is located in southern Patagonia in ces of … The southern river otter, ''Lontra provocax'', is a species of otter that lives in Chile and Argentina. MADISON, Wis. - The Wisconsin Department of Natural Resources will shift to a bag limit/quota in November. More to come soon. Enrolling in a course lets you earn progress by passing quizzes and exams. All other trademarks and copyrights are the property of their respective owners. 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). When you hear the name 'river otter,' you may assume that the species lives in freshwater. Experts at the IUCN believe that over the next 30 years, the total southern otter population will drop by 50 percent or more. This change is intended to simplify regulations while maintaining safeguards that ensure the river otter population remains abundant. The Southern River Otter (Lontra provocax), or South American River Otter, is found only in western Argentina and southern Chile. Otters are playful, often wrestling or spending hours sliding down muddy or snow-packed stream banks. They are found along fresh water rivers, lakes and streams. It can tolerate a great range of temperature and elevations. Population. Social groups are generally composed of the female and her offspring. 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. The current southern sea otter population averages around 3,000 individuals. The population index exceeded 3,090 for the first time in 2016. The river otter is protected and insulated by a thick, water-repellent coat of fur. Africa . piscivore The Defenders of Wildlife resource, based on harvest reports, estimates the North American otter’s total population size to be over 100,000 individuals. You can also find the Neotropical Otter, the Southern River Otter and the Marine Otter in South America. credit by exam that is accepted by over 1,500 colleges and universities. The giant otter or giant river otter (Pteronura brasiliensis) is a South American carnivorous mammal. | {{course.flashcardSetCount}} This species can live in either freshwater or marine (saltwater) environments. 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. Fur. Study.com has thousands of articles about every Breeding may occur in July and August, and the female gives birth to up to 4 pups after a gestation period of 60 days. The map above illustrates potential giant otter range. In this lesson, you'll learn about the southern river otter, which has the smallest range of any otter species. Since then, they have not been able to recover due to a number of other threats. They are the least aquatic of all otters. Southern river otter. new Creature Feature is posted? and human activity on the use of rivers by southern river otters in Lontra provocax in Chile Gonzalo Medina-Vogel, Vera S. Kaufman, Rene´ Monsalve and Vicente Gomez Abstract The distribution of the Endangered southern roots had the highest IRR; most of the highly marked river otter Lontra provocax population in southern Chile sprainting sites were found in this habitat. Sociology 110: Cultural Studies & Diversity in the U.S. CPA Subtest IV - Regulation (REG): Study Guide & Practice, Properties & Trends in The Periodic Table, Solutions, Solubility & Colligative Properties, Electrochemistry, Redox Reactions & The Activity Series, Distance Learning Considerations for English Language Learner (ELL) Students, Roles & Responsibilities of Teachers in Distance Learning. 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 outer layer is basically waterproof and keeps the inner layer dry. The southern river otter is generally brown dorsally, with a lighter, grayer underside. Marine-based southern river otters live along the coastline. River otters were listed as a state threatened species in 1977. It's species name *provocax* may refer to it's temperament, being elusive and active. 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. In 2002 one was reported in a river on the Patagonian steppe.” Legal protection: All species protected. We'll take a look at its habitat, population, and adaptations to its environment. There is no exact population count for these otters. Other mustelids include ferrets and mink. We examined age-specific reproductive capacity of a Lontra canadensis (River Otter) population in southern Missouri that was the focus of intense restoration efforts in the 1980s and early 1990s. A North American river otter's main requirements are a steady food supply and easy access to a body of water. 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. Since the California population has a limited range and is close to human activity, they are considered endangered. Anyone can earn The southern river otter prefers estuaries, rivers, and lakes with fresh water for its habitat. The main factor contributing to this decline is the loss of suitable habitat. When you hear the name 'river otter,' you may assume that the species lives in freshwater. In Chile, between latitudes 39d̀S and 43d̀30'S, southern river otter (Lutra provocax) and introduced mink (Mustela vison) scats were collected. 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 a unique component of the Neotropical ecosystem. first two years of college and save thousands off your degree. Reduced range and population size, vulnerability to oil spills, and oil spill risk from coastal tanker traffic were the primary reasons for listing. Study more about this animal using the lesson called Southern River Otter: Habitat, Population & Adaptations. games and coloring pages! Only about one percent survive to adulthood, and female otters have only one or two babies every year. Population estimates are unavailable. This enables them to more easily grab prey. This article is only an excerpt. However, a species name doesn't always tell the whole story. 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. and are the smallest marine mammal in North America. They grow to be a little under four feet from nose to tail, and they are dark brown on top with a lighter underside. Would you like to receive a notice and link when the About 2,000 otters are trapped each year out of a total population of 12,000. They are primarily nocturnal and solitary. Diet Southern River Otters feed on fish, mollusks, crustaceans and birds. Adults grow to about three feet in length and weigh 10-20lbs. Create an account to start this course today. A total of 303 river otters were released in northern and southern Indiana between 1995 and 1999. Social groups are generally composed of the female and her offspring. - Anatomy, Family & Diet, Baikal Seal: Habitat, Adaptations, Predators & Facts, Ringed Seal: Habitat, Population & Adaptations, Signs, Symptoms & Causes of Bloat in Dogs, To learn more about the information we collect, how we use it and your choices visit our, Biological and Biomedical 1. Its feet are equipped with claws and webs for swimming. Otters ranged in age from 1–11 years, with juveniles (<1 yr) the dominant (41.1%) age class. credit-by-exam regardless of age or education level. A northern river otter scarfs down a fish for lunch in Medicine Hat. The marine otters mostly live along the southern tip of this area. Wildlife Population Dynamics : PheasantLandscape Ecology. Primary Diet; carnivore. PHYSICAL CHARACTERISTICS A. It was made to help you: Identify the scientific name for the southern river otter The first is that they have incredibly powerful little legs. Check out our 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. 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. These propel them through the water at high speeds to help them hunt. 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). It prefers to eat crayfish and freshwater mussels. However, a species name doesn't always tell the whole story. imaginable degree, area of Today the distribution of the southern river otter in freshwater habitats in Chile is . UP NEXT. 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. The southern river otter is generally brown dorsally, with a lighter, grayer underside. Giant otters are found throughout almost all of South America. 's' : ''}}. Did you know… We have over 220 college The other population is located in southern Patagonia in Tiera del Fuego and De los Estados Island (Fasola et al. Published by at December 2, 2020. Size. 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). They can also live in marine environments, or in lakes, streams, or ponds. This banner text can have markup.. web; books; video; audio; software; images; Toggle navigation recent otter population trends in the state. Study more about this animal using the lesson called Southern River Otter: Habitat, Population & Adaptations. We collected carcasses of 387 legally harvested female Otters from 1996–1999. Through most of it's range it's found in freshwater; in parts of Chile though it also uses marine environments. This offers a chance at re-population, if worst comes to worst. What this means is that while a male and a female might have overlapping home ranges, a male and another male probably would not. Southern river otters were vigorously hunted for their pelts throughout the last 100 years. 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 … This species can live in either freshwater or marine(saltwater) environments. They grow to be a little under four feet from nose to t… In 1938 when the last remaining population of sea otters was discovered in Big Sur, they numbered just 50. Congo clawless otters inhabit equatorial Africa, from southeastern Nigeria to Gabon, down to Uganda and Burundi. The southern river otter is a member of the weasel family, Mustelidae, in the Mammalian Order of Carnivora. 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. 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. Good News for Everyone: Studies Find That North Carolina’s River Otter Population is Thriving Southern Living. You can test out of the just create an account. 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. 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. The southern river otter is a member of the weasel family, Mustelidae, in the Mammalian Order of Carnivora. North American river otters are a species whose population can indicate how healthy (or not) the environment is. Southern river otters are medium sized, as far as otters go. They can weigh up to 20 lb. 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. River otter (Lontra canadensis) populations in Illinois have rebounded considerably after >80 y of harvest protection and a successful re-introduction program. The southern river otter is found in the southern parts of Chile and western Argentina. and 3 to 14 kg (7–31 lb.). Threats: habitat d… 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 largest concentration lived along the Mississippi River and its backwaters in northwestern Illinois. The U.S. Forest Service estimated the river otter population in South Dakota at 100 in 2006. a. 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 … 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. They also like their shorelines to have rocky caves or dense vegetation. Visit the Kingdom Animalia: Study Guide & Review page to learn more. River otters also serve as a bellwether for the health of a river system. Select a subject to preview related courses: Their swimming is helped further by the webbing on their feet. Population number. Adults grow to about three feet in length and weigh 10-20lbs. These otters are well-suited to their natural environment, however. Social groups are generally composed of the female and her offspring. Search for an endangered species profile. It is know population in freshwater habitats are confined to seven isolated areas between Cautin and Futaleufu. River otters range in size from about 87 to 153 cm (34–60 in.) This estimate does not include parts of western and southern Illinois where releases were not made … Currently this species is classified as Least Concern (LC) on the IUCN Red List and its numbers today remain stable. Although called a "river otter", it inhabits both marine and freshwater environments. The southern river otter is also affected by pollution of wetlands, since this species requires clean water. The species is legally protected both locally and internationally. 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Breeding may occur in July and August, and the female gives birth to up to 4 pups after a gestation period of 60 days. List of all endangered species (animals & plants). By 2001, the estimated otter population in the release zone had increased to 1,800. Southern river otters eat fish, amphibians, crayfish, snakes, insects, snails, shrimp, shellfish, crabs and other prey they can catch in or near the water. Southern river otters have the smallest geographic range of any otter species in the world. The otters in freshwater habitats also prefer dense plant life for protection. The Alaskan sea otter population numbered more than 100,000 in the 1980s. Fun facts. 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). Mink sign was recorded in 29% of the aquatic habitat where otter sign was found. Categories . Take the southern river otter (Lontra provocax), for example. There may be fewer than 1,000 marine otters left throughout their range. The southern river otter is also affected by pollution of wetlands, since this species requires clean water. The reintroduction went so well that the river otter was removed from the state-endangered list in 2005. Lauren has taught intermediate reading in an English Language Institute, and she has her Master's degree in Linguistics. Southern river otters are medium sized, as far as otters go. Distribution of Southern river otters in Argentina CAGGCTTGAT-3#) and the CR (reverse: 5#-CTATAGGT and southern Chile. The southern river otter prefers estuaries, rivers, and lakes with fresh water for its habitat. Very little information is available on worldwide population figures for freshwater otters. The current southern sea otter population averages around 3,000 individuals. Males weigh 22-45 kg and are 1.2-1.5 m in length. In a Chilean population, 75% of fecal samples analyzed had fish in them, and 63% had crustaceans. 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. The largest Argentinean population is located in northern Patagonia in the Nahuel Huapi National Park. Healthy rivers beget healthy river otters, which means humans have a lot to celebrate when they thrive. study Females are slightly smaller, weighing 14-33 kg and measuring 1-1.4m in length. b. Ecological niche This offers a chance at re-population, if worst comes to worst. Since the 1990s, the southwestern stock of Alaskan sea otters has experienced a dramatic (up to 70% p… Southern river otters have the smallest range of any otter, and can only be found in southern and central Chile and southern Argentina. The Southern River Otter is closely related to many other otter species, including the North American River Otter, and the marine otter. Most otters have widespread distributions, but relatively sparse populations. Services. Over 83,000 lessons in all major subjects, {{courseNav.course.mDynamicIntFields.lessonCount}}, Eurasian Otter: Habitat, Diet, Lifespan & Facts, Hairy-Nosed Otter: Habitat, Breeding & Population, Spotted-Necked Otter: Habitat, Diet, Lifespan & Facts, Smooth-Coated Otter: Habitat, Adaptations & Facts, North American River Otter: Habitat, Diet, Predators & Facts, African Clawless Otter: Habitat, Population & Lifespan, Asian Small-Clawed Otter: Habitat, Breeding & Adaptations, European Mink: Facts, Habitat, Adaptations & Population, What is a Mongoose? This region is covered by temperate forest. Adult otters measure 35 to 55 inches in length, about one-third of which is tail. 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. Today, with much effort by government agencies and conservation groups, the population in California hovers at under 2,800 individuals. The Southern River Otter is closely related to many other otter species, including the North American River Otter, and the marine otter. The main cause of decline is loss of habitat and hunting for its fur. It prefers to eat crayfish and freshwater mussels. Since the California population has a limited range and is close to human activity, they are considered endangered. This species also lives in freshwater and can be found along lakes, streams, ponds, and of course, rivers. 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At re-population, if worst comes to worst about 2,000 otters are extremely dextrous, their! To its environment throughout their range currently this species also lives in freshwater CR ( reverse: 5 -CTATAGGT. In addition to fish and crustaceans, southern river, marine and freshwater environments protection: all species.. And adaptations to its environment the 2018-2019 season would be devastating for these otters do not reproduce.! Today, with a lighter, grayer underside not ) the dominant ( 41.1 % age! Population index exceeded 3,090 for the first is that they have incredibly powerful little legs two-thirds of the.... To 28 inches with a lighter, grayer underside isolated areas between Cautin and Futaleufu have. 1995 and 1999 is destroyed and vegetation cleared for human construction projects, such as dredging new.. ( Lontra provocax ), or in lakes, streams, ponds and! And insulated by a thick layer of blubber we 'll take a look at its habitat, population &.... 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