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<br />Canyon. Finally, many concerns are difficult to address in an attempt to perform <br />streamside spawning, such as controlling for family size, etc. These concerns are <br />critical in affecting the Ne of the broodstock (Doyle et al. 2001), and should not be <br />ignored. <br /> <br />700 <br /> <br />100 <br /> <br /> <br />600 <br /> <br />500 <br /> <br />8, 400 <br />.. <br />ftI <br />J: <br />U <br />III <br />is 300 <br /> <br />200 <br /> <br />o <br />Oet Nov Dee Jan Feb Mar Apr May June July Aug Sept <br /> <br />Month <br /> <br />Figure 2. Daily mean discharge (cubic feet per second) of Little Colorado River for <br />water years 1947-2003. Data from USGS gage station 0940200 near Cameron, <br />Arizona. <br /> <br />Identification of components necessary to develop a brood stock management <br />plan and of a suitable hatchery to hold fish. <br /> <br />It is beyond the scope of this document to develop a brood stock management plan. We <br />have, however, addressed some of the concerns that need to be considered in <br />developing a broodstock management plan (e.g., genetic considerations, how many fish <br />might be needed, etc.). In addition, we can list some of the basic components that a <br />hatchery should possess in order to develop a brood stock. <br /> <br />First, the objectives of a broodstock management plan must be clearly identified. As <br />discussed above, a primary objective should be maintaining maximum genetic <br />variability. Once this is achieved in a broodsfock, a secondary objective would be to <br />release fish in order to gain a demographic boost in the wild population. This secondary <br />objective must be attended with strict measures to prevent genetic problems from <br />occurring. All potential genetic risks should be listed and thoroughly discussed in the <br /> <br />21 <br />