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0 <br />than being placed directly into the river. <br />Identification of :spawning areas could be obtained during the first year <br />if researchers are successful in monitoring the movements of the adult <br />razorback sucker with radiotelemetry. One means to determine the best time of <br />year that would allow the best survival would be to release fish at different <br />times of the year (e. g., early spring prior to runoff, during runoff, or <br />summer following runoff). Releasing fish at these various time periods would <br />be conducted during alternate years. <br />Number of Fish to Stock <br />Another important consideration is the number of razorback sucker to <br />release per stocking site. The number stocked will be determined by <br />development of broodstock, the availability and spawning success of hatchery- <br />cultured razorback sucker, and success of rearing hatchery fish to the desired <br />size for stocking. For the initial 'phase', approximately 10 to 20 hatchery- <br />reared razorback sucker would be stocked in each target reach. The total <br />number of adult razorback sucker that must ultimately be stocked to <br />significantly increase the size of the adult-fish population is unknown. One <br />of the priorities in a stocking program is to establish an effective breeding <br />population. Allendorf and Ryman (1987), for example, recommended an effective <br />breeding population of 200 for sustaining hatchery stocks of salmonids. <br />Williams et al. (1988) suggested stocking fish at a 1:1 sex ratio. Based upon <br />these recommendations, a minim of 100 male and 10 fP_ ? ?cult-sue <br />razorback suckers should be stocked per location. This also would be the <br />minimum number of fish that would be required for a worthwhile post-stocking <br />evaluation to be performed. If more fish are available, 250 of each sex <br />should be stocked. <br />31 <br />P