River otter

Terrestrial and aquatic mammals, from highest to lowest mink, raccoon, river otter, bats. 

Yates DE, Mayack DT, Munney K, Evers DC, Major A, Kaur T, Taylor RJ. 2005. Mercury levels in mink Mustela vison) and river otter (Lontra canadensis) from northeastern North America. Ecotoxicology 14 263-274. 

River otter, Lutra canadensis >2.0 mg/kg in diet Fatal within 7 months 4, 8... 

Halbrook, R.S., J.H. Jenkins, P.B. Bush, and N.D. Seabolt. 1994. Sublethal concentrations of mercury in river otters monitoring environmental contamination. Arch. Environ. Contam. Toxicol. 27 306-310. 

Ropek, R.M. and R.K. Neely. 1993. Mercury levels in Michigan river otters, Lutra canadensis. Jour. Freshwat. Ecol. 8 141-147. 

River otter, Lutra canadensis-, Ontario, Canada ... 

Mirex concentrations in muscle and liver of mammalian wildlife in Alabama and Georgia during the period 1973 to 1976 from reference areas were always less than 0.04 mg mirex/kg FW in muscle and less than 0.07 mg/kg FW in liver (Hill and Dent 1985). In mirex-treated areas, conspecifics were collected up to 2 years posttreatment. Maximum concentrations of mirex in muscle and liver from mirex-treated areas were always less than 1.0 mg/kg FW in raccoons, bobcats (Lynx rufus), mink (Mustela vison), and foxes (Urocyon sp., Vulpes sp.). Higher concentrations of 3.7 mg/kg FW in muscle and 1.1 mg/kg FW in liver were measured in the river otter (Lutra... 

In water, currents may be utilized or even created to communicate chemically. Beaver, river otter, mink, or various fish may simply release their odorants into a... 

River otter , lutra Feces, urine, AGS Trowbridge, 1983,... 

Free-ranging North American beaver. Castor canadensis, feed less on experimental aspen sticks that have been treated with extracts from predator excrement or urine. Odors from the sympatric coyote and river otter, and extirpated lynx, were most effective, while those from allopatric lion and extirpated wolf odor were less active. However, these response differences between species were small (Fig. 12.2 Engelhart and Muller-Schwarze 1995). 

Numbers of visits to scent stations baited with fatty acid tablets or prey odor such as shellfish oil allows estimation of population sizes of free-living red and gray foxes, raccoons, striped skunks, river otter, bobcats, cottontail rabbits, and oppossums. However, Smith et al. (1994) showed that the numbers of raccoon visits to scent stations did not reflect the size of their population. 

Kannan, K., Newsted, J., Halbrook, R. S., Giesy, J. P. Perfluorooctanesulfonates and related fluorinated hydrocarbons in mink and river otters from the United States. Environmental Science Technology, 36 2566-2571 (2002). 

We may find scent marks of the giant river otter. 

There are 11 species of river otter, including the Eurasian river otter Lutra lutrd), the North American... 

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