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<br />.:> <br />) <br />(....) <br />1-' <br />~ <br />:,;.1\ <br /> <br />2. <br /> <br />Increased contact with anglers by Federal and State game <br />management and enforcement personnel while anglers are in the <br />process of fishing; and <br /> <br />3. Posting of signs at higher concentration angler use areas. <br /> <br />e. A rigorous enforcement program will be implemented by Federal and State <br />game management agencies to minimize incidental taking of endangered <br />fishes. <br /> <br />3.6 DETERMINATION OF FISH DENSITIES. REPRODUCTIVE AND RECRUITMENT <br />POTENTIALS. AND ASSESSMENT OF THE NEED FOR AUGMENTATION <br /> <br />3.6.1 Present Fish Densities <br /> <br />A small reproducing population of Colorado squawfish exists in the San Juan <br />River. Since 1987 twelve adult squawfish have been captured and several <br />others observed between Bluff. Utah and Shiprock. New Mexico. In 1987-1988, <br />and 1990. young of year squawfish were collected downstream of Shiprock (two). <br />near Bluff (six). and in the inflow area of Lake Powell (eleven). One adult <br />squawfish has also been collected in Lake Powell (1991 Squawfish Recovery <br />Pl an). <br /> <br />Only one razorback sucker has been collected in the San Juan River since <br />systematic research efforts began in 1987. During that period. 38 razorbacks <br />were captured in the inflow area of Lake Powell (10 of which were recaptured <br />from previous years). Many of the razorbacks were observed in spawning <br />condition, however, no reproduction or recruitment has been identified. <br /> <br />3.6.2 Reoroductive and Recruitment Potentials <br /> <br />Within the San Juan River subbasin, the extent of annual recruitment and/or <br />survival of young Colorado squawfi5h has not been determined. Spawning is <br />thought to take place in the San Juan River between July and August. The <br />location of spawning areas in the San Juan River are not well defined. but <br /> <br />29 <br />