Anticoagulant rodenticide exposure in Barred Owls (Strix varia) collected in Washington and Oregon 2015-2017

This dataset includes anticoagulant rodenticide (AR) screening results of 40 Barred Owls (Strix varia) collected in forested landscapes of Washington and Oregon from 2015-2017. Liver tissue was collected from each owl and screened for exposure to eight AR compounds, including 4 first-generation ARs (warfarin, diphacinone, chlorophacinone, and coumachlor), and 4 second-generation ARs (brodifacoum, bromadionlone, difethialone, and difenacoum). Additionally, this dataset includes geographic, temporal, environmental, and biological attributes of individual owls that were identified as potential sources of variation in AR exposure and/or useful measurements for assessing AR exposure risk of sympatric northern spotted...

Categories: Data; Tags: Barred owl, Ecology, Environmental Health, Forestry, Northern spotted owl, All tags... Oregon, Pacific Northwest, USGS Science Data Catalog (SDC), Washington, Wildlife Biology, anticoagulant rodenticide, biota, biota, birds, brodifacoum, bromadiolone, chlorophacinone, coumachlor, difenacoum, difethialone, diphacinone, ecotoxicology, forest ecosystems, rodenticide, warfarin, Fewer tags

Count and detection-nondetection survey data of Barred Owls (Strix varia) in historical breeding territories of Northern Spotted Owls (Strix occidentalis caurina) in the Oregon Coast Ranges, 1995-2016

This dataset contains count and detection-nondetection data of Barred Owls from 106 historical breeding territories of Northern Spotted Owl territories (i.e. sites) in the Oregon Coast Ranges from 1995 to 2016. Data collected from 1995 to 2014 are partitioned into 2-week periods from 1 March – 31 August each year, totaling 12 possible sampling periods per year. Data collected from 2015 and 2016 are partitioned into 2-month periods from 1 March – 31 August, totaling 3 possible sampling periods each year. This dataset also describes the proportion of total area surveyed per site per sampling period in 2015 and 2016, as well as the proportion of each site with older coniferous forest in each year (1995 – 2016).

Categories: Data; Tags: Barred Owl, Dail-Madsen model, Ecology, Forestry, N-mixture model, All tags... Oregon, Oregon Coast Range, Strix varia, USGS Science Data Catalog (SDC), Wildlife Biology, biota, detection probability, integrated population model, occupancy, unmarked data, Fewer tags

Northern spotted owl data and analysis code, Cascade Range, Pacific Northwest, USA

These data were compiled to allow examination of northern spotted owl territorial occupancy dynamics, especially with regards to the roles played by habitat and competition with barred owl in past and future dynamics. Data are estimates of parameters derived from previous modelling of northern spotted owl territorial occupancy dynamics. These data were collected as part of monitoring of northern spotted owl demography. Associated code allows analysis of these estimates to understand the roles of competition and habitat in recent northern spotted owl declines and to predict the future of northern spotted owl under various management scenarios.

Tags: California, Cascade Range, Cle Elum, Coast Ranges, Ecology, All tags... Geography, Green Diamond Reserve, H J Andrews Experimental Forest, Hoopa, Information Sciences, Klamath, Mount Rainier, Northwest California, Olympic Mountains, Oregon, Pacific Northwest, South Cascades, Tyee, USGS Science Data Catalog (SDC), Washington, Wildlife Biology, barred owl, biota, competitive exclusion, demographics, ecological competition, forecasting, future dynamics, habitats, northern spotted owl, older forest, past dynamics, population dynamics, terrestrial ecosystems, territorial occupancy, territorial occupancy dynamics, Fewer tags