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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 140 (continued) <br /> <br />Chemically <br />fingerprinting <br />nonnative fishes in <br />reservoirs (project <br />C18/19) <br /> <br />Yampa River pike <br />sources (Project 143) <br /> <br />Study Goal and Objectives <br /> <br />Objectives <br />1. Select treatment and reference areas for study. <br />2. Implement removal of smallmouth bass and northern pike in treatment reaches in spring <br />(mostly conducted in a different study). <br />3. Assess abundance of predators in treatment and reference reaches to determine removal effects. <br />4. Conduct additional removals prior to summer if removals were not sufficient or if the removal <br />effect was transitory. <br />5. Estimate response of native fishes in autumn after spring-summer predator removal. <br />Goal <br />To determine chemical "fingerprints" of nonnative fishes in reservoirs that are potential sources <br />of nonnative fishes to critical habitat. <br />Objectives <br />1. Quantify chemical "fingerprints" of fishes within study reservoirs and evaluate degree of inter- <br />annual variation in those fingerprints. <br />2. Determine if fish sampled in rivers the vicinity of study reservoir possess otoliths core <br />signatures that identify them as having originated from one of the study reservoirs. <br />3. Improve our understanding of the degree to which immigration or transfers from reservoirs <br />contributes to the load of nonnative fishes in critical habitat of the Upper Colorado River Basin. <br />4. Provide recommendations to guide management efforts to reduce the influx of nonnative fishes <br />from reservoirs. <br />Goal 1. <br />Map degree of movement of pike within the Yampa River system via otoliths microchemistry. <br />Objectives 1. <br />1. Demonstrate differences in chemical signatures of otoliths of age-O pike from various sources. <br />2. Evaluate how quickly differences can be detected via laser ablation. <br />3. Estimate the proportion of pike recruited from reservoirs and other spawning areas in the <br />Yampa River. <br />4. Estimate the extent of pike movement from spawning sources and reservoirs to other habitats <br />within the Yampa River system. <br />Goal 2. <br />Evaluate trophic relationships of pike within Stagecoach Reservoir, Lake Catamount, Elkhead <br />Reservoir, and portions ofthe Yampa River using stable isotope analysis. <br /> <br />Status <br /> <br />Ongoing <br /> <br />Ongoing <br /> <br />FY <br /> <br />2006 - <br />2009 <br /> <br />2005 - <br />2006 <br /> <br />~ <br />~ <br />~ <br />~ <br />::ti <br />V:l <br />"-3 <br />8 <br />~ <br /> <br />~ <br /> <br />:> <br />I <br />...... <br />o <br /> <br />~ <br />~ <br />$;! <br />~ <br /> <br />-'" <br />'" <br />c <br />C <br />'-l <br />
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