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being developed for the portion of the Colorado River in Grand Canyon and will serve as a <br />template for the integration of the rest of Colorado River system. A great need exists for a <br />standard fisheries data base structure for the entire Colorado River basin. This data base <br />development can serve as a prototype to be expanded and improved as a valuable information <br />source for many researchers for years to come. <br />The third study that was contributed to this report was conducted by Northern Arizona <br />University School of Forestry. This work incorporated the use of current and historical aerial <br />photography with existing 1:2400 orthophoto quads to develop a GIS data base to be used for <br />analysis of vegetation change in relation to river regulation. <br />26