Laserfiche WebLink
<br />o <br />..;') <br />~., <br />l-' <br />~ <br />....:! <br /> <br />for reintroduction in the San Juan River would come only after agreement <br />regarding its need, and would be consolidated with augmentation activities <br />conducted as part of the Upper Basin Recovery Implementation Program. If <br />reintroduction efforts prove successful. genetically-compatible. hatchery- <br />reared fish could then be used to augment existing populations, or to expand <br />the present range of these species. <br /> <br />Sources of 1 arva 1 fi sh may i nc 1 ude: Cal fert il i zed eggs, fry. and young-of- <br />the-year, obtained from hatCheries; Cbl adult fish captured form the wild; Ccl <br />eggs and milt obtained from wild adult fish; or Cdl hatchery-stocked adult <br />females and reintroduced milt from wild males. After the fish have been <br />reared to the desired size. they would be released to the river. Different <br />sizes of marked fish could be released to determine the relationship between <br />size of introduced fish and their survival. <br /> <br />Existing rare fish hatchery facilities are being evaluated as part of the <br />Upper Basin RIP to determine if hatcheries can provide the number of hatchery- <br />reared fish needed for research and future augmentation. These facilities <br />must be capable of raising disease-free, genetically-diverse, healthy fish. <br />If sufficient capability is not available. expansion of an existing hatchery <br />facility or construction of a new facility could occur. The facility will be <br />planned to meet the needs of the San Juan Basin, as well as those of the Green <br />and Colorado basins. <br /> <br />Grow-out ponds, instead of hatcheries. could serve as rearing areas for fry <br />and young-of-the-year to accelerate growth and increase survival. For <br />example. in gravel pits near Grand Junction. Colorado 5quawfish have been <br />raised in 1 year to a size that would take 3 years in the wild. The Upper <br />Basin RIP is successfully raising razorback suckers in grow-out ponds at the <br />Endangered Fishes Propagation Research Center near Ouray. Utah <br /> <br />Refugia need to be established to insure protection of the San Juan genetic <br />stock. A limited number of wild fishes need to be captured and placed in <br />refugia. and used to maintain a genetically diverse hatchery brood stock. In <br />addition, genetic studies will be needed to test for variation among wild <br /> <br />31 <br />