giant river otter vs sea otter
The Giant River Otter was nearly hunted to extinction during the 1950’s and 60’s and the Giant River Otter was so close to extinction that ion 1979 just twelve of them remained.  Furthermore, Defler observed associations between giant otters and the Amazon river dolphins, and suggested that dolphins may benefit by fish fleeing from the otters. The giant otter is also rare in captivity; in 2003, only 60 animals were being held.. They are extremely easy to hunt, being active through the day and highly inquisitive. You can also find the Neotropical Otter and the Marine Otter in South America. Other species that prey upon similar food resources include the caimans and large fish that are themselves piscivores. It’s been a while since I posted one from the Pantanal in Brazil so here’s a giant river otter — the largest otter in the world. Using all of its evolutionary traits to its advantage the rare massive 100 pound Otter of the Sea wacks the head of the Giant River Otter with a rock. This one was quietly slipping back into the water after being on the riverbank taking a rest. The Otter of the Sea was almost trapped to extinction through the 1800's because of their desirable fur coats. , Suriname still has significant forest cover and an extensive system of protected areas, much of which protects the giant otter. The giant river otter is the longest member of the Mustelidae or weasel family. It’s afternoon, the giant otter shrew looks around at nature around them, this particular shrew has just barely escaped capture from human researchers, and now has decided that it was going to hunt. Duplaix documented interaction with the neotropical otter. In South America, the giant otter resides among hundreds of hungry caimans (a type of crocodilian related to alligators) without any issue. Check this one out: Giant otter with fish. Atypical of mustelids, the giant otter is a social species, with family groups typically supporting three to eight members. , The giant otter is very sensitive to human activity when rearing its young. Appearance. The implementation of CITES in 1973 finally brought about significant hunting reductions, although demand did not disappear entirely: in the 1980s, pelt prices were as high as US$250 on the European market. These are two jaguar sisters named Medrosa and Jaju. The giant river otter can bee seen with groups from two to twenty, but most group sizes have about eight otters. Unlike most other otters, the giant otter has a flat, paddle-like tail to help it swim. The marine otter is larger than the Eurasian Otter. It is the noisiest otter species, and distinct vocalizations have been documented that indicate alarm, aggression, and reassurance. , The species possesses 2n = 38 chromosomes..  Typically, loggers first move into rainforest, clearing the vegetation along riverbanks.  They then search for new territory to begin a family of their own. Other researchers suggest approximately 7 square kilometres (2.7 sq mi) and note a strong inverse correlation between sociality and home range size; the highly social giant otter has smaller home range sizes than would be expected for a species of its mass. , Local people sometimes take pups for the exotic pet trade or as pets for themselves, but the animal rapidly grows to become unmanageable.  The legs are short and stubby and end in large webbed feet tipped with sharp claws. The giant river otters have also been noted to feed on small anacondas and caimans. The main diet of the otter is made up of fish and crustaceans. First, sea otters are two to three times the size of river otters — and, when at the water’s surface, they float on their backs, while river otters swim belly down like most animals.  One difference in behavior was seen in the country in 2002: the normally inquisitive giant otters showed "active avoidance behavior with visible panic" when boats appeared. , Convention on International Trade in Endangered Species of Wild Fauna and Flora, https://iwokrama.org/mammals/guides/carn4.html, "Searching for the Giant Otter in Northeastern Argentina", "Otters: An Action Plan for their Conservation", "Cytogenetic study of the giant otter Pteronura brasiliensis Zimmermann 1780 (Carnivora, Mustelidae, Lutrinae)", "Otters: A SeaWorld Education Department Publication", "The Vocal Repertoire of Adult and Neonate Giant Otters (, "Territorial choruses of giant otter groups (Pteronura brasiliensis) encode information on group identity", "Distribution and Population Status of the Giant Otter Pteronura brasiliensis in Bolivia", "Intraspecific Agonism between Giant Otter Groups", "Change Of Partners In A Giant Otter Alpha Couple", "An analysis and review of the sociobiology of the Mustelidae", Guianas Rapid River Bio-assessments and Giant Otter Conservation Project, "Dry and Rainy Season Estimations of Giant Otter, Pteronura brasiliensis, Home-Range in the Yasuní National Park, Ecuador", "How a social lifestyle helped drive a river otter species to near extinction", "Differential resilience of Amazonian otters along the Rio Negro in the aftermath of the 20th century international fur trade", "Mercury levels in tissues of Giant otters (, "Giant Otter Project In Peru: Field Trip And Activity Report, 1998", "A Survey of Kaburi Creek, West Suriname, and its Conservation Implications", "WWF welcomes Latin America's largest freshwater protected area", "Estudio preliminar sobre el estado de conservación de la nutria gigante (Pteronura brasiliensis) en la zona de influencia de Inírida (Bajo río Inírida) Guainía, Colombia", "PER-I38: El mundo del agua temido y poco conocido", "Biology and conservation of Giant Otter (, https://en.wikipedia.org/w/index.php?title=Giant_otter&oldid=999674889, Articles with Spanish-language sources (es), Wikipedia indefinitely move-protected pages, Articles containing Portuguese-language text, Articles containing Spanish-language text, Creative Commons Attribution-ShareAlike License, This page was last edited on 11 January 2021, at 10:41. The giant otter shows a variety of adaptations suitable to an amphibious lifestyle, including exceptionally dense fur, a wing-like tail, and webbed feet.  Pups open their eyes in their fourth week, begin walking in their fifth, and are able to swim confidently between 12 and 14 weeks old. Giant otters catch their own food and consume it immediately; they grasp the fish firmly between the forepaws and begin eating noisily at the head. Whether you’re sailing the coast of the Pacific Northwest or hiking the riverbanks of West Virginia, you now have the tools to tell the difference between river otters and sea otters. They are also downright scary-looking. Habitat degradation and loss is the greatest current threat. April 26, 2018 - This is a giant otter. The genus name, Pteronura, is derived from the Ancient Greek words pteron/πτερόν (feather or wing) and oura/οὐρά (tail), a reference to its distinctive, wing-like tail. Sea Otter in Morro Bay, Califormia . 2013. The animal's well-muscled tail can add a further 70 cm (28 in) to the total body length. Giant Armadillo, Giant Flying Squirrel V. Giant Flying Fox, Goat of the Mountain V. Shrew of the Water, Pocket Gopher of the Mountain V. Otter of the Sea, Porcupine of the Cape V. Baby of the Bush, White Faced Capuchin V. Burrowing Bettong, Hairy Nosed Wombat V. Screaming Hairy Armadillo. The giant otter ranges across north-central South America; it lives mostly in and along the Amazon River and in the Pantanal. Giant otters served as Yaku runa's canoes. The Giant River Otter is found to be one of the most dangerous water dwelling creatures in the Guianas, where the locals have given it the name “river wolf”. The giant otter needs to eat 3kg (6½lb) of fish each day. , In 2006, most of this species lived in the Brazilian Amazon and its bordering areas. Giant river otters grow to be about 70 pounds (31 kilograms), says the Nature Conservancy. You otter know: It’s Sea Otter Awareness Week! Its distribution has been greatly reduced and is now discontinuous. Though the fur trade is … They noted that the species may be the basal divergence among the otters or fall outside of them altogether, having split even before other mustelids, such as the ermine, polecat, and mink. A capacity for aggressive behavior should not be overstated with the giant otter. They are engaged in a standoff near Panthera’s research station in Southern Brazil.  In another instance in Brazil, a carcass was found with clear indications of violent assault by other otters, including bites to the snout and genitals, an attack pattern similar to that exhibited by captive animals. , The animal faces a variety of critical threats. Males are between 1.5 and 1.7 m (4.9 and 5.6 ft) in length from head to tail and females between 1 and 1.5 m (3.3 and 4.9 ft). It feeds mainly on fish and crabs, which it tracks down with its sensitive whiskers. 8.)  (Larger figures may reflect two or three family groups temporarily feeding together. Adult sea otters typically weigh between 14 and 45 kg (30 to 100 lb), making them the heaviest members of the weasel family, but among the smallest marine mammals.  The nose (or rhinarium) is completely covered in fur, with only the two slit-like nostrils visible. The smaller neotropical otter is far more shy, less noisy, and less social; at about a third the weight of the giant otter, it is more vulnerable to predation, hence, a lack of conspicuousness is to its advantage.  The fur is extremely dense, so much so that water cannot penetrate to the skin. The giant otter has a handful of other names. Giant river otter cubs are born totally covered in fur. Incorrect descriptions of the species have led to multiple synonyms (the latter subspecies is often P. b. paranensis in the literature). Whistles may be used as advance warning of nonhostile intent between groups, although evidence is limited. , Even if without direct predation, the giant otter must still compete with other predators for food resources. Schenck et al., who undertook extensive fieldwork in Peru in the 1990s, suggest specific "no-go" zones where the species is most frequently observed, offset by observation towers and platforms to allow viewing.  P. b. paraguensis is supposedly smaller and more gregarious, with different dentition and skull morphology. Jaguars have a diet of primarily caimans and capybaras … but these sisters seem intent on possibly broadening their dietary horizons. The giant river otter has become rare or nonexistent over most of its range. The Giant River Otter is known for being an apex predator, hunting with speed and efficiency, the Giant River Otter is known to eat anything from a piranha to a even caimans.  The giant otter seems to prefer prey fish that are generally immobile on river bottoms in clear water. In other otter species, vision is generally normal or slightly myopic, both on land and in water. The giant otter is an especially noisy animal, with a complex repertoire of vocalizations. Animals And Pets Baby Animals Funny Animals Cute Animals Baby Giraffes Wild Animals Otters Holding Hands Holding Hands Quotes Otter Love.  Otters do not visit or mark every site daily, but usually patrol all of them, often by a pair of otters in the morning. VS The sea otter (Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean.  Both species also show strong pair bonding and paternal engagement in rearing cubs. Their long tail may add as much as 70cm (28in) to this body length. , Research generally takes place in the dry season and an understanding of the species' overall habitat use remains partial. At 5.6 feet (1.7 meters), they are the biggest otters in the world and the longest members of the weasel family. Neanderthal Hunting Party v.s. Giant otter muzzles are short and sloping and give the head a ball-shaped appearance. The Otter of the Sea floats amongst its raft of colony members. , The species has also appeared in the folklore of the region. , The giant otter has lost as much as 80% of its South American range. Statistics show between 1959 and 1969 Amazonian Brazil alone accounted for 1,000 to 3,000 pelts annually. Almost always swim in a dog paddle, almost never swim on their backs. An average giant otter will weigh between 22 and 32kg (49-71lbs)..  In Spanish, river wolf (Spanish: lobo de río) and water dog (Spanish: perro de agua) are used occasionally (though the latter also refers to several different animals) and may have been more common in the reports of explorers in the 19th and early 20th centuries. Group sizes are anywhere from two to 20 members, but likely average between four and eight. An analysis of dry season range size for three otter groups in Ecuador found areas between 0.45 and 2.79 square kilometres (0.17 and 1.08 sq mi). The giant river otter is a great reminder that lovability can come in all sizes. The Otter of the Sea was almost trapped to extinction through the 1800's because of their desirable fur coats. Parasites, such as the larvae of flies and a variety of intestinal worms, also afflict the giant otter.  Bolivia designated wetlands larger than the size of Switzerland as a freshwater protected area in 2001; these are also home to the giant otter.  The spectacled caiman is another potential competitor, but Duplaix found no conflict with the species in Suriname. Buy Photos. In 2002 one was reported in a river on the Patagonian steppe.” Legal protection: All species protected.  In some cases, supposed cooperative hunting may be incidental, a result of group members fishing individually in close proximity; truly coordinated hunting may only occur where the prey cannot be taken by a single giant otter, such as with small anacondas and juvenile black caiman.  In addition, solitary animals and young may be vulnerable to attacks by the jaguar, cougar, and anaconda, but this is based on historical reports, not direct observation. They give birth between August and September, and the young pups emerge for the first time in October and November, which are the months of lowest water and fish concentrations in the dwindling lakes and channels are at their peak.  The animal's relatively late sexual maturity and complex social life makes hunting especially disastrous.. ) The animal sometimes drowns in nets set across rivers and machete attacks by fishermen have been noted, according to Duplaix, but "tolerance is the rule" in Suriname. Well suited for an aquatic life, it can close its ears and nose while underwater.  Study of captive specimens has found only males initiate copulation. Males are between 1.5 and 1.7 m (4.9 and 5.6 ft) in length from head to tail and females between 1 and 1.5 m (3.3 and 4.9 ft). Many people don’t know the difference between sea otters and river otters — but, with a little info, you’ll be able to tell right away. Giant river otters are very sociable and live in families of between 3 – 10 individuals that hunt together.  A Ticuna legend has it that the giant otter exchanged places with the jaguar: the story says jaguar formerly lived in the water and the giant otter came to the land only to eat. Other countries have taken a lead in designating protected areas in South America.  A number of restrictions on land use and human intrusion are required to properly maintain wild populations. Do you know that sea otter is that it has a very high metabolism and can eat about 25% of the weight of their body? Among the Achuar people, they are known as wankanim,, among the Sanumá as hadami and among the Makushi as turara.  Other causes of death include accidents, gastroenteritis, infanticide, and epileptic seizures. , The species can hunt singly, in pairs, and in groups, relying on sharp eyesight to locate prey. An IUCN study in 2006 suggested 1,000 to 5,000 otters remain. 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). Giant River Otter v.s Giant Otter Shrew. The entire group, including nonreproductive adults, which are usually older siblings to that year's pups, collaborates to catch enough fish for the young. One full-year study of giant otter scats in Amazonian Brazil found fish present in all fecal samples. The groups are centered on a dominant breeding pair and are extremely cohesive and cooperative. Two river dolphins, the tucuxi and boto, might potentially compete with the giant otter, but different spatial use and dietary preferences suggest minimal overlap. Other threats to the giant otter include conflict with fishermen, who often view the species as a nuisance (see below). The species was listed as endangered in 1999 and wild population estimates are typically below 5,000. Group members share roles, structured around the dominant breeding pair.  Its smaller prey, different denning habits, and different preferred water types also reduce interaction.. Giant Otters’ Main Characteristics. The giant otter subsists almost exclusively on a diet of fish, particularly characins and catfish, but may also eat crabs, turtles, snakes and small caiman.  Population densities varied with a high of 1.2/km2 (3.1/sq mi) reported in Suriname and with a low of 0.154/km2 (0.40/sq mi) found in Guyana. 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