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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.
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 smooth-coated otter (Lutrogale perspicillata) is a freshwater otter species from regions of South and Southwest Asia, with the majority of its numbers found in Southeast Asia. It has been ranked as "vulnerable" on the IUCN Red List since 1996, as it is threatened by habitat loss, pollution of wetlands and poaching for the illegal wildlife ...
Habitats vary widely as well, from the arboreal marten to the fossorial European badger to the marine sea otter. Population sizes are largely unknown, though two species, the sea mink and Japanese otter , were hunted to extinction in 1894 and 1979, respectively, and several other species are endangered .
The southern river otter can be found in marine, freshwater, and terrestrial habitats, but are mostly found in freshwater lakes and rivers having a significant amount of dense vegetation, especially along the shorelines, which must be present to use as cover. Their habitats also need the root systems of mature trees, as well as fallen tree debris.
Healing the ecosystem so the otters could come back had the win-win effect of helping manage an invasive species. "The sea otters, they're like an assistant manager for us," she said. The pattern ...
The near-threatened Eurasian otter The maned wolf is near-threatened largely as the result of habitat loss. The gray bat was moved from "endangered" to "near-threatened" due to successful conservation efforts.
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