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~~ <br />Conclusions and Recomendations <br />The area sampled (approximately 18 river mdles) was a very wall portioa <br />of the entire San Juan River that vas to be evaluated based on the objectives <br />of the study listed above. However, river/reservoir conflneaces are well knave <br />as attractants to a vide variety of aquatic life. This area proved to be no <br />exception, since maerous fish species in large numbers were sampled. With the <br />exception of the razorback suckers, we were not able to capture large numbers <br />of other rare fish species, Colorado squawfish in particular. The other rare <br />fish species of concern, humpback and bonytail chubs, were not found, but their <br />presence was not ezpected since they are not known to maintain a close associr <br />Lion with reservoir habitats. Nevertheless, sane significant discoveries were <br />made about the rare fish collected and are summarized below: <br />1) Adult razorback suckers are present within the San Jean arm of Lake <br />Powell and probably have attempted spawning is the reservoir in 1987. <br />2) Colorado squawfish are also present in the San Juan arm of Lake Powell <br />and have successfully spawned upstream f river mile 14.3 is 1987. <br />3) The lower riverine portions of the San Juaa Biver (between RHT 14.3-b.0) <br />provided backwater habitat for young-of-the-year Colorado squawf is6 in <br />1987. <br />One season's worth of data cannot provide enough information to make broad <br />conclusions on the importance of the San Juan River to rare and endangered <br />fish. Additional data collection is recomended to deterziae flow zequiremeats <br />for spawning success and young-of-the-year squawfish survival. Also, more <br />adult squawfish need to be collected and tagged in such a way that their move- <br />meets can be monitored. Surgically implanting radio tags with individually <br />22 <br />