eurasian otter weight

What does an Otter eat? The Eurasian otter, the scientific name Lutra lutra, also referred to as the European otter, Eurasian river otter, common otter, and Old World otter, is a semiaquatic mammal native to Eurasia. Yes, otters can be dangerous as they are wild animals, and there are chances that they might harm you. Individuals are up to 90 cm. Its occurrence is declining (Newton etal. Discusses the diet, behavior, breeding, movements, communication, and social organization of otters and examines the otter's relationships with other animals The diet composition and feeding habits of the Eurasian otter (Lutra lutra) were studied by post mortem examination of individuals (n = 236) found dead in Hungary in order to test the dietary differences between sample types (stomach and rectum), calculation methods and different factors.A relationship was found between the summarized wet weight (W) and occurrence number (O) of food … For their disappearance, at least in Britain, there was good evidence that the use of dieldrin was responsible (Newton etal. PCBs alter the metabolism of vitamin A in the body (as does dieldrin), causing developmental irregularities (including fetal resorption and abortion) and increasing the risk of infections and cancer. These had largely disappeared after 3 years, and there were no further measurable differences in otter diet, density or home range size. In order to power their high metabolisms, it’s estimated that they consume around 25% of their body weight every single day. Tropical Stream Ecology describes the main features of tropical streams and their ecology. Their favorite places include wetlands, rivers, and coastlines. Diet and fish choice of Eurasian otters (Lutra lutra L.) in fish wintering ponds in Hungary. Almost all of these, with the exception of PCBs and mercury, occurred in concentrations well below the levels known to have any significant lethal or sub-lethal effects in individual mammals or birds (e.g. It started in the 1950s, and continued into the 1970s and 1980s (summaries by Jefferies 1989; Mason and Macdonald 1986). Their populations are divided into various sea otter species such as small clawed otter, North American river otters, giant otters, southern sea otters, marine otters (Lontra felina) and several other otter species. Kissing is a way to show that they care for each other. The male otters are known as boars, and the female otters are known as sows. 3—Eurasian Otter. size: 87-115 cm (body 57-79 cm; tail 30-36 cm) weight: 3-6 kg. There was a significant negative correlation between the body condition of otters and the PCB concentration in the liver; the most likely explanation for this was that, in animals in bad condition, body fats are mobilized and consequently the contaminants of those lipids are moved into the liver. The water vole is under serious threat from habitat loss and predation by the American mink. Our results suggest that Eurasian otters are susceptible to infection with L. … 12.10). Mason (1989) suggested that otter populations with PCB values of 50 ppm (lipid in liver) or more should be declining. A large male may consume as much as 11 kg (25 lb.) Found inside – Page 258Assuming a family of 5 Smooth Otters weighed around 45kg, the otter group would eat c. 7kg of fish per day. Otters thus need many ... Eurasian Otters preferred the narrow, fast-flowing river head waters. Eurasian Otters are solitary. Number of carcasses analysed: Shetland, 14; Orkney, 14; north/north-west, 10; north central, 10; north-east, 33; west, 18; south-west, 13. The results were complicated, as expected, but we could draw some tentative conclusions (Kruuk and Conroy 1991, 1996). Don't forget to add a tail either! The sea otters also hold each other’s hands while they sleep on their backs in the ocean to protect each other. A study of such compounds, in their present-day role in mortality of Eurasian otters, may therefore provide further insights in their effects on otter populations (Kruuk and Conroy 1991, 1996; Kruuk etal. The diet composition and feeding habits of the Eurasian otter (Lutra lutra) were studied by post mortem examination of individuals (n = 236) found dead in Hungary in order to test the dietary differences between sample types (stomach and rectum), calculation methods and different factors. Their diet includes the mentioned animals. In the first year after the accident, their body condition was lower than that of otters in a control area, but 3 years later this difference had disappeared. 1993). The European otter is the most widely distributed otter species being widely spread across Europe. The smallest otter is the Asian small-clawed otter, which grows up to 2.9 feet (90 centim… The most widely distributed otter is the Eurasian otter, found throughout Europe, North Africa, and Asia to Japan and Indonesia. 6 1. introduction 1.1 Background The Eurasian otter Lutra lutra is a popular species, highly valued by the general public. in body length, with a tail that is up to 45 cm. The European or Eurasian otter is often referred to as the common otter. The female is shorter than the male. They live in water that ranges in temperature from 35-60°F, so in order to keep their body temperature at approximately 100°F, a sea otter needs to east approximately 25% of its body weight each day! Males weigh up to 90 lbs. The Eurasian otter weighs around 16-27 lb (7.2-12.2 kg), the marine otter weighs around 6.6- 13 lb (2.9-5.8 kg), and hairy-nosed otters weigh about 11-13.2 lb (4.9-5.9 kg). They are elusive and solitary in nature. There is little doubt in anyone's mind that chemical pollution has been the cause of the dramatic, sharp, and in some places ultimate decline of Eurasian otter populations in England and several other countries in Europe. This forms part of … One cannot exclude a potential involvement of contaminants, although other factors may be responsible. Based on the bestselling book, Rivers of North America, this new guide stands as the only primary source of complete and comparative baseline data on the biological and hydrological characteristics of more than 180 of the highest profile ... Their bones show osteosclerosis, increasing their density to reduce buoyancy. 57-95 cm. The Eurasian otter is a typical species of the otter subfamily. The female is shorter than the male. 2002), and arctic foxes in Svalbard carry a similarly high burden (Wang-Andersen et al. 199 7a). The largest sea otter is a lot bigger when compared to the other species of otters. VIIth International Otter Colloquium - 103 - HEAVY METALS AND PCBS IN EURASIAN OTTERS (Lutra lutra) IN SOUTH KOREA Sung Yong HAN1, Sung Won SON1, Motokazu ANDO2, Hiroshi SASAKI3 1 Dept. The giant otter teeth are strong and can have a powerful bite if you try to threaten them or harm them. They also have the thickest fur of any animal. Found inside – Page 167The year that the cubs spend with their mother is the longest time Eurasian otters live in a group. ... Near threatened Fish, ducks, water voles Europe, Asia △ FRESH CATCH Fish make up about 80 percent of a Eurasian otter's diet. As per their habitat requirements, the American mink frequently co-occur with the Eurasian otter (Lutra lutra Linnaeus, 1758). of food daily. Eurasian otters … 2650; Garrott etal. Sea otters are good indicators of ocean health. In addition, they are a keystone species, offering a stabilizing effect on ecosystem, controlling sea urchin populations that would otherwise inflict damage to kelp forest ecosystems. Lifespan: Up to 22 years. Methods of Collecting Food PCBs at the above concentrations appeared to be relatively harmless in otter populations, but it is possible that they have deleterious effects on individual otters. Weight: 6 - 12 kg: IUCN status: NT (Near Threatened) Current Holdings Former Holdings. Newton (1988), in a seminal paper on the effects of pollution in birds of prey, pointed out that the (often well known) concentration of a chemical that causes death in half of exposed individuals (LD50) bears no relationship to concentrations required to cause a population decline. The Eurasian otter showed bilateral epistaxis, anorexia, apathy, and weight loss. River otters eat 15% to 20% of their total body weight each day. In most of the research on chemical contaminants in otters, of whichever species, there is no information on populations. They are not afraid to show how much they care for each other. They also communicate through smell and have their scent mark with the use of secret glands near their tail. The pup reaches sexual maturity by the age of two to three years. Age of otter (years) Figure 12.11 Older Eurasian otters in Shetland have significantly more methyl mercury in their liver (rs = 0.63, P < 0.001). Registered Office: 7 Black Park, Broadford, Isle of Skye, IV49 9DE, Scotland, Dedicated to the conservation, protection and care of otters. The Eurasian otter is an aquatic mammal belonging to the Mutelidae family together with weasels and badgers. Animals such as pilot whales around Faroe are now deemed dangerous for human consumption, because of their high levels of PCBs (Simmonds etal. Here, the mean mercury concentrations in otter livers was 9 ppm, similar to that found by Wren (1984) in river otters in Canada. What is weight and height of an otter? Some sea otters (Enhydra lutris) live alone, whereas some of the other otters live in pairs as they generally forage in the water as well as on land. Dénes Nagy. Her analysis takes readers to the haunts of intriguing semi-aquatic mammals from around the world,; introducing the "paradoxical platypus,an Australian egg-laying monotreme that detects prey through electroreception; venturing into the ... Otter food requirements must be taken into consideration before making a decision. 2004b); this ailment could easily have been overlooked in many previous post-mortem examinations. The number of otters keeps changing based on different factors such as climate change, weather conditions, hunting, predators, environmental factors, and their surroundings which can all affect their lifespan. At least 13 otters died, with symptoms of gastrointestinal bleeding, probably after ingesting the oil during grooming. Most of the otters like to live in their natural habitat. The sea otter is known to be the largest member of the weasel family. The Eurasian otter weighs around 16-27 lb (7.2-12.2 kg), the marine otter weighs around 6.6- 13 lb (2.9-5.8 kg), and hairy-nosed otters weigh about 11-13.2 lb (4.9-5.9 kg). They also need a lot of space to be able to swim and run around. They have high quality thick fur, which is important for life in the water, almost 50,000 hairs per 1 cm2! 1993, Macdonald & Strachan 1999, Jedrzejewska et al. Adult marine mammals gain weight and lose weight based on the water temperatures throughout the year. Otters shouldn’t be contained as pets in the house as they are wild animals. Otters usually eat crustaceans, fish, frog, rodents, and the marine invertebrates with hard shells like crab, mussels, etc.

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