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The Eurasian otter declined across its range in the second half of the 20th century [28] primarily due to pollution from polychlorinated biphenyls and pesticides such as organochlorine. Other threats included habitat loss and hunting, both legal and illegal. [29] Eurasian otter populations are now recovering in many parts of Europe.
However, during the winter and in colder environments, fish consumption is significantly lower and the otters use other resources for their food supply. Their diets can consist of amphibians (mainly frogs and pond turtles), bird predation (mainly anserine species), small rodents , and invertebrates such as water beetles, snails, and crayfish.
Several otter species live in cold waters and have high metabolic rates to help keep them warm. Eurasian otters must eat 15% of their body weight each day, and sea otters 20 to 25%, depending on the temperature. In water as warm as 10 °C (50 °F), an otter needs to catch 100 g (3.5 oz) of fish per hour to survive.
The North American river otter (Lontra canadensis), also known as the northern river otter and river otter, is a semiaquatic mammal that lives only on the North American continent throughout most of Canada, along the coasts of the United States and its inland waterways. An adult North American river otter can weigh between 5.0 and 14 kg (11.0 ...
Six extant mustelid genera left-to-right, top-to-bottom: Martes, Meles, Lutra, Gulo, Mustela, and Mellivora Mustelidae is a family of mammals in the order Carnivora, which includes weasels, badgers, otters, ferrets, martens, minks, and wolverines, and many other extant and extinct genera.
A newborn sea otter found alone on Vargas Island off the coast of British Columbia continues to recover at the Vancouver Aquarium. ... we brought Luna out into the upper otter habitat for a brief ...
An otter at the St. Louis Aquarium in St. Louis, Missouri had one woman stressed. The poor thing was hungry! All he wanted was for one of the many guests at the aquarium that day to give him a snack.
These species were previously included in the genus Lutra, together with the Eurasian otter, but they have now been moved to a separate genus. The genus comprises four living and one known fossil species: