There are 13 known species of otters, which range in size from 2.9 feet (90 cm) all the way to 5.9 feet (1.8 m) long! How many otters are there in Italy? California’s southern sea otter has been listed as a threatened species under the Endangered Species Act since 1977. There are no terrestrial mammal species native to Antarctica. Males are larger than females. Sea otter population growth has stalled in recent years and many hurdles for full population recovery remain. Adult marine otters are quite small. In Florida, river otters weigh 5-14 kg (11-31 lb). There are 13 different otter species and two varieties of sea otters. ... A large number of species devour approximately 15% to 25% of their body-weight each day. What does an Otter look like? Excellent and lithe swimmers, the young are in the water by 10 weeks of age. They usually have long, slim bodies and possess short limbs. Article (PDF Available) ... (southern Italy) have led to the discovery of a new species, here described as Alzoniella cervarensis n. sp. How many species of Otters are there? Otters & Stillwater Fisheries Advice Otter prey and feeding behaviour By improving rivers and wetlands for otters, we are making sure that the On average an otter’s diet is 70-80% fish, although their preferred species is eels, and they also eat a wide variety of other food including amphibians (frogs and toads), reptiles, shellfish, … Welcome to the Otters of the World. The river otter is … Otters are well suited to a life on the water as they have webbed feet, dense fur to keep them warm, and can close their ears and nose when underwater. The Japanese otter was known as one of the top carnivores in the aquatic food chain. iStock Only one otter species seems to be thriving, and that's the North American River Otter. Now international trade in the species may be banned. There are 13 otter species around the world, including the giant river otters, North American river otter, Asian small-clawed otter, European otter, Japanese river otter and African clawless otter, as well as many less well known species. In fact, sea otters do not cause local extinction of species. 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. 41 years later and counting, their conservation status remains unchanged and their future uncertain. Their webbed feet and long, muscular tail enable them to swim … An adult North American river otter can weigh between 5.0 and 14 kg (11.0 and 30.9 lb). They are semiaquatic, aquatic, or marine-based on the fish and the invertebrates. Otters have a long muscular tail, short stout legs and thick oiled fur. They are fast, naturally secretive and usually nocturnal. Mating, birth, and nursing take place onshore, in protected dens. Asian small-clawed otters are increasingly popular as novelty pets, particularly in Japan. Because of their voracious appetite, they are occasionally accused of driving their prey species into decline by fishermen who compete for the same prey species. Ebony is threatened due to … Endangered Species: Ebony Ebony (Diospyros crassiflora) is a tree native to the rain forests of central Africa, including Congo, Cameroon, and Gabon. North American river otters were hunted and trapped extensively for their fur in the 19th and 20th centuries, and are still hunted in some places. Today, accidental trappings in beaver traps constitute the most otter fatalities. Small rounded ears and nostrils close when the otter is underwater. As recently as the mid-1980s, more than 30,000 pelts were harvested annually. In the long-term, the otter can play a key role in a river’s ecology, and perhaps help to check the spread of alien species such as the signal crayfish and mitten crab. The 10 best places to look for otters and their signs . They were extirpated from portions of their range, but conservation and reintroduction efforts are helping populations to recover. In the past, there were thousands of river otters in Japan. North American river otters (L. canadensis) are still taken as part of the commercial fur trade, but the primary threats to others are the destruction of wetland habitats and pollution. They are active during the day and at night, hunting in streams, rivers and ponds … They are perfectly adapted to a semi-aquatic life. As top predators, sea otters are critical to maintaining the balance of nearshore ecosystems, such as kelp forests, embayments and estuaries. Extinction in the water by 10 weeks of age are critical to maintaining balance. 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