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<br />00524 <br /> <br />52 <br /> <br />i. <br /> <br />Project B.6. Completion of Experimental Treatment - Spawning Redds and Suppression <br />Mechanisms <br /> <br />FUNDING HISTORY Fiscal vear <br /> 2003 2004 2005 2006 <br />Outside GCMRC <br />Science/Labor - 145,000 - 100,000 <br />LOl'istics Field Suooort - 20,000 - 30,000 <br />Project Related <br />Travel/TrainiDlJ - - - - <br />Ooerations/SunDlies - - - <br />GCMRC Salaries - - - 14,215 <br />Proiect Subtotal - - - 144,215 <br />DOl Customer Burden <br />(6 to 17%) - 10,000 - 13,517 <br />Proiect Total - 175,000 - 157,732 <br />% Total Outsourced - 88% 0 73% <br /> <br />. <br /> <br />Principal Investigators: L. Coggins, U.S. Geological Survey (GCJ\lrRC), and J. Korman, <br />Ecometric Research Inc. <br /> <br />Statement of Problem: Experimental flows from 2003 - 2005 targeted survival rate of young <br />rainbow trout through increased daily fluctuations in flow from January through March. A study <br />was conducted during this period to measure the impact of the flows on the early life stages of <br />rainbow trout below Glen Canyon Dam. The study measured timing and distribution ofredd <br />excavation across elevations, quantified spawning habitat preferences with depth, velocity and <br />substrate relative to changes in discharge, estimated trends in trout fry recruitment and survival <br />in Glen Canyon, and lastly surveyed for redd and fry in the mainstem below Lees Ferry to the <br />Little Colorado River confluence to evaluate natural reproduction in the mainstem. The results <br />and conclusions provide testable hypotheses around these four objectives with the prospect of <br />returning to previous MLFF operations. <br /> <br />Project Summary: This project would follow-up on data collection initiated under <br />experimental flows to determine how MLFF operations affect survival rates of young rainbow <br />trout below Glen Canyon Dam. The specifics of the project are still in the development phase. <br /> <br />. <br /> <br />GCMRC FY2006 Annual Work Plan (Draft, June 10,2005) <br />