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Where occupied habitat is exceptionally extensive and continuous, that habitat may be subdivided into multiple contiguous occurrences as long as that does not reduce the occurrence rank (i.e., do not split up an A occurrence into multiple occurrences that would be ranked less than A). The dividing lines should be made as much as possible along lines of limited otter use.","separationJustification":"Individual otters regularly move large distances. Home ranges are large and often generally linear along streams and shorelines, typically 30-50 kilometers long for males or pairs (Jackson 1961). Home range lengths at all seasons were 10-81 kilometers in Idaho (Melquist and Hornocker 1983); 20 kilometers of marine shoreline for males in Alaska, 10 kilometers for females (Bowyer et al. 1995); average of 32 km for 10 radio-tagged individuals in Colorado (Mack 1985). Young may disperse up to 200 km (Melquist and Hornocker 1983).<br /><br />Thus populations and metapopulations generally occupy large areas. For this and other wide-ranging, low density mammals, it seems most reasonable to base occurrences (and conservation efforts) on major occupied landscape features rather than on specific prescribed separation distances.","versionDate":"2005-03-09","versionAuthor":"Hammerson, G., and S. Cannings","versionNotes":null,"lastModified":"2021-10-02T17:01:42.920254Z"}],"plantCharacteristics":null,"elementManagement":{"elementGlobalId":102243,"eoManagementGroupName":null,"stewardshipOverview":null,"impacts":null,"restorationPotential":null,"siteConservationPlansConsidered":null,"managementMethods":"Suseptible to overharvest (Toweill and Tabor 1982). <br><br>See Berg (1982) for information on reintroduction. See Tango et al. (1991) for a review of information on reproduction by reintroduced otters. 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