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WSP05007
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Last modified
1/26/2010 2:16:33 PM
Creation date
10/12/2006 12:47:38 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8240.200.10.B
Description
UCRBRIP Program Summaries/ Updates
Basin
Colorado Mainstem
Date
2/9/1996
Author
USDOI/FWS
Title
Fiscal Year 1995 Summary Report
Water Supply Pro - Doc Type
Publication
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<br />35 FG4: SQUAWFISH OVERWINTER SURVIVAL <br /> <br />The purpose of this study is to evaluate the overwinter survival of age-O Colorado <br />squawfish (Ptychocheilus lucius) in the Green River. The goals are to: <br /> <br />I. Understand the relationship between river discharge and other important <br />environmental variables and the reproductive success and early-life survival of fishes <br />(especially the endangered species) in the upper Colorado River basin. <br /> <br />2. Continue sampling of age-O Colofado squawfish in the spring to include the Green <br />River. If reSults of spring sampling are found to be useful, consider making such <br />sampling part of the Intefagency Standardized Monitoring Program (ISMP). <br /> <br />3. Analyze data include in ISMP reporting; identify possible relations between the <br />relative abundance of important species and discharge regime and other factors that <br />affect apparent rate of overwinter survival of age-O Colorado squawfish. <br /> <br />Recommendations: none <br /> <br />36 FG5: WINTERlSPRlNGFLOWEFFECTS <br /> <br />The purpose oflhis project is to determine the effects of winter and spring flows on <br />overwinter movement and survival of young Colorado squawfish. Mark/recapture <br />studies are conducted in the autumn and following spring to estimate overwinter <br />survival and overwinter movement of young fish. In addition, sampling is conducted <br />post-spring runoff to determine the effects of spring flow on distribution of young fish. <br />Field work is scheduled for completion in 1996 and data synthesis in 1997. <br /> <br />Recommendations: I) coordinate with the overwinter survival spring sampling by <br />UDWR and Biowest to look for marked fish in the lower Green River; and 2) continue <br />with project as approved. <br /> <br />37 FG6: FLAMING GORGE ROLE IN AQUATIC HABITAT CHANGE <br /> <br />This study is developing a reconstructed history of changes in aquatic habitat <br />throughout the Green River and Cataract Canyon system based on geologic mapping <br />and dating, analysis of aerial photography, and repeat photography. The history will be <br />interpreted through comparison with: I) the known history of river hydrology as <br />measured at the basin's USGS gaging stations; 2) computed changes in the river's <br />sediment budget; and 3) available research results concerning the link between <br />geomorphic characteristics and aquatic habitat availability. This third type of <br />interpretation is critical to developing a clear understanding of the significance of <br />measured geomorphic change, Biological significance of channel narrowing, change in <br />channel bars, and changes in bed elevation will be assessed by measuring change in <br />available backwaters and modeling changes in the frequency of overbank flooding. <br /> <br />A-7 <br />
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