WOPR Bull Trout Distribution Arc

These data were intitially developed by ODFW's Bull Trout coordinator and are based on data collected through 2000 by state, federal and tribal fishery biologists. Those data represent areas of documented Bull Trout presence. Most surveys captured by the initial dataset were completed during the summer and fall months. Wintertime distributions could vary significantly from summer/fall locations, but very little data exist statewide to portray an accurate picture of winter distribution for Bull Trout. These coverages are not considered complete as we continue to look for bull trout in potential habitat across their range and we likewise lack extensive information on winter habitat. During the 1:24,000 Fish Habitat Distribution Mapping project conducted in 2001 and 2002, these data were plotted on top of USGS 7.5 minute quadrangle pairs and then provided to ODFW and other natural resources agency field staff. Based on survey data, supporting documentation, and the best professional judgment of the field biologists, the distribution of usetypes (see the USETYPE field) were marked on the maps with colored pens. These hardcopy data were then digitized by ODFW GIS staff and stored as event tables, in .DBF and INFO file format. For the purpose of distributing these data, the event tables have been converted into coverage format with the EVENTARC command. While this results in a static version of the dataset, it allows the information be available in a more commonly used format. Event tables are available at: <http://rainbow.dfw.state.or.us/nrimp/information/fishdistdata.htm>