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Last modified
8/11/2009 11:32:58 AM
Creation date
8/10/2009 5:12:54 PM
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UCREFRP
UCREFRP Catalog Number
9705
Author
Green River Study Plan ad hoc Committee.
Title
Study plan for the implementation and evaluation of flow and temperature recommendations for endangered fishes in the Green River downstream of Flaming Gorge Dam.
USFW Year
2007.
USFW - Doc Type
Upper Colorado River Endangered Fish Recovery Program
Copyright Material
NO
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<br />Table AI. Continued. <br />Studies <br />Project Cap-6 rzlbt <br />(continued) <br /> <br />Entrainment of larval <br />razorback sucker <br />(project Cap-6 rzlentr) <br /> <br />Green River native fish <br />response to nonnative <br />control (project 144) <br /> <br />Assessment of <br />endangered fish <br />reproduction in relation <br />to Flaming Gorge <br />operations (project 221) <br /> <br />Study Goal and Objectives <br /> <br />Obiectives <br />1. Evaluate survival and growth oflarval razorback sucker in the presence of nonnative <br />predators by stocking larvae into experimental enclosures at four stocking densities. <br />2. Evaluate survival and growth oflarval razorback sucker and bonytail in the presence of <br />nonnative predators by stocking together at equal densities into experimental enclosures. <br />Goal <br />Evaluate larval razorback sucker drift characteristics and use the data to revise management <br />for middle Green River floodplains based on potential larval razorback sucker entrainment. <br />Obiectives <br />1. Evaluate larval drift and entrainment patterns downstream from Razorback bar. <br />2. Evaluate larval drift and entrainment into floodplains from other potential spawning sites. <br />3. Continue to evaluate the effectiveness of breach connections for entraining drift at various <br />points on thehydrograph. <br />4. Use data to refme the Floodplain Drift Model and for testing floodplain management <br />scenarios. <br />Goal <br />A reliable estimate of native fish response to an estimated level of nonnative predator removal. <br />Obiectives <br />1. Implement removal of northern pike from Island Park to the confluence ofthe White River <br />and smallmouth bass from Split Mountain to Sand Wash. This objective will be implemented <br />under the projects: Northern pike control in the middle Green River (Project 109) and <br />smallmouth bass control in the Green River (Project # 123). <br />2. Assess abundance of northern pike and smallmouth bass in the middle Green River to <br />determine removal effect. <br />3. Estimate response of small-bodied and early life-stage native fish to removal of northern <br />pike and smallmouth bass. <br />Goal <br />The goal of this project is to detect timing of reproduction by razorback sucker and Colorado <br />pikeminnow, and determine patterns of presence oflarvae and their relative abundance <br />downstream of potential spawning sites in the middle Green River system. A second goal is to <br />monitor temperature regimes of the Green and Yampa rivers in order to comply with Flaming <br />Gorge flow recommendations. <br /> <br />Status <br /> <br />Ongoing <br /> <br />Ongoing <br /> <br />Ongoing <br /> <br />FY <br /> <br />2004 - 2008 <br /> <br />2006 - 2007 <br />(synthesis <br />report) <br /> <br />1990 - TBD <br /> <br />c;") <br />~ <br />~ <br />~ <br />~ <br />~ <br />~ <br />~ <br />""<: <br />~ <br /> <br />:> <br />I <br />+:0. <br /> <br />~ <br /><::3- <br />"'l <br />l:: <br />l:l <br />~ <br />.~ <br />~ <br /><:::> <br /><:::> <br />'-l <br />
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