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<br />'''1 ." <br /> <br />1993 BudQet (Study No.2 cont.) <br /> <br />-Labor <br />- Travel <br />-Equipment <br />-TOTAL <br /> <br />UDWR <br />$38,000 <br />5,000 <br />5.000 <br />48,000 <br /> <br />USU <br />$20,000 <br />1,000 <br />3.000 <br />24,000 <br /> <br />Total <br />$58,000 <br />6,000 <br />8.000 <br />$72,000 <br /> <br />Studv #3. Annual assessment of mainstem razorback sucker eQQ and larval <br />oroduction. <br /> <br />Oescriotion of work <br />A preliminary study conducted by the Service and the lFL to evaluate <br />mainstem spawning by razorback sucker. The study's primary goal is <br />to determine if razorback sucker are successfully spawning in the <br />mainstem of the lower Vampa River and the Green River. If it is <br />found that razorback sucker are depositing eggs and young are being <br />produced at suspected spawning locations, this study may be expanded <br />into a long-term core-research study. <br /> <br />Methods <br />1. Determi ne if razorback suckers 1 ay thei r eggs on suspected <br />spawning bars by: <br />a. sampling for adults over suspected spawning bars using <br />electrofishing and netting techniques <br />b. collecting eggs on the spawning bar using various <br />experimental sampling devices (e.g. vacuum pumps and <br />artificial substrates) <br />c. verification of razorback sucker eggs will be made by <br />transporting eggs to laboratory for hatching and rearing to an <br />identifiable size. <br /> <br />2. Determine if razorback sucker larvae are produced from suspected <br />spawning bar by: <br />a. Collecting larvae in passive drift nets on four 24 hour <br />sampling occasions <br />b. Collecting larvae in downstream backwaters by seining <br />c. verification of larvae will be made by transporting young <br />fish to the laboratory and rearing to an identifiable size. <br /> <br />Oeliverables <br />The Service will submit an annual report by end of the fiscal year <br />and a final report upon completion of the study. <br /> <br />Rationale <br />Information on razorback sucker reproduction in the Green River is <br />extremely limited. Several suspected spawning locations are known <br />in the Green River above Jensen and in the lower Vampa River. <br />However, it is not known if razorbacks are successfully spawning at <br />these locations. It is critical to know if eggs and larvae are <br />being produced so that flow requirements for spawning can be <br /> <br />Flaming Gorge Studies <br /> <br />22 <br />