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r~ <br />t Recent distribution maps only show locations where recent sampling has occurred. We <br /> <br />' assumed that historical collection localities without recent (after 1979) verification were <br /> not currently inhabited. Undiscovered data or future sampling efforts may verify <br /> <br />' historical lacalities or reveal additional localities where the study species occur. Thus, <br />int data <br />d <br />f <br /> . <br />po <br />orme <br />for recent distribution maps, shading represents only range and trans <br /> <br />' This comparative approach offers a conservative view of recent distribution and <br /> o ulation trends. <br />Pp <br />' f th <br /> e <br />Percent decline calculations-We calculated percent decline in ranges o <br /> three study species by subtracting shaded-reach length totals for recent maps from <br /> shaded-reach length totals for historical maps, and dividing this value by historical, <br /> shaded-reach length totals. Shaded-reach length totals were tabularly determined using <br /> ArcView. <br />' <br /> own mi tion barriers <br />Population designations-We merged maps of kn gra <br />' (primarily dams) with our recent distribution maps to designate preliminary populations. <br />- Ongoing barrier removal, repatriation of the study spies to historical habitats, and <br />' discovery of additional populations will necessitate revision of our designations. <br /> <br /> <br /> <br /> <br />1 <br /> <br />' Final Report September 2002 <br />1.4 <br /> <br />