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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (2) OGC WMS Layer (2) OGC WMS Service (2) Contacts National Wildlife Health Center Emily R Lankau U.S. Geological Survey - ScienceBase Ecosystems Nancy J Thomas More... Categories Data (2) Tag Types Theme (2) Place (2) Harvest Set (2) Tag Schemes None (2) Geographic Names Information System (GNIS) (1) Common geographic areas (1) USGS Thesaurus (1) View Results as: JSON ATOM CSV

Mortality trends in northern sea otters (Enhydra lutris kenyoni) collected from the coast of Washington and Oregon during 2002—2015: Data During 2002−2015 we examined the causes of mortality in beachcast northern sea otters (Enhydra lutris kenyoni) collected from the coasts of Washington and Oregon states. A total of 333 moribund or dead sea otters were reported through opportunistic observations and 93 otter carcasses were collected for necropsy. Retrieved carcasses received a full diagnostic evaluation to determine cause of death when carcass condition permitted. Otter stranding reports were received from the entire Washington coast and northern Oregon coast, but carcasses located near areas populated by humans were most often in suitable condition for cause of death determination. Data in this release include basic demographic information on the... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clallam County, Washington, USA, Clatsop County, Oregon, USA, Enhydra lutris, Grays Harbor County, Washington, USA, Jefferson County, Washington, USA, All tags... Lincoln County, Oregon, USA, Oregon, USA, Pacific County, Washington, USA, Sarcocystis neurona, Tillamook County, Oregon, USA, USGS Science Data Catalog (SDC), Washington, USA, leptospirosis, morbillivirus, mortality, population trends, salvage of beachcast carcasses, sea otter, Fewer tags Northern Sea Otter Aging Criteria: data Measurement of skull ossification patterns is a standard method for aging various mammalian species and has been used to age Russian, Californian, and Alaskan sea otter populations. Cementum annuli counts have also been verified as an accurate aging method for the Alaskan sea otter population. In this study, cementum annuli count results and skull ossification patterns were compared as methods for aging the northern sea otter (Enhydra lutris kenyoni) population in Washington State. Significant agreement was found between the two methods suggesting that either method could be used to age the Washington population of otters. This study also found that ossification of the squamosal-jugal suture at the ventral glenoid... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Age determination, Clallam, Grays Harbor, Jefferson, Pacific, All tags... USGS Science Data Catalog (SDC), Washington, age estimation methods, cementum annuli, dental assessment, morphometry, skull ossification, tooth eruption, tooth wear, Fewer tags