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Last modified
7/14/2009 5:02:31 PM
Creation date
5/20/2009 10:56:16 AM
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UCREFRP
UCREFRP Catalog Number
7904
Author
Lentsch, L. D., T. Crowl, P. Nelson and T. Modde.
Title
Levee Removal Strategic Plan - Final Report.
USFW Year
1996.
USFW - Doc Type
Salt Lake City, UT.
Copyright Material
NO
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Larval fish will be collected with light traps and sweep nets coincident with the high flow period. <br />Monthly sampling of each site will be maintained following peak flows and continue until terrace <br />habitats have been dewatered. Following dewatering of terrace habitats sampling will continue on <br />a monthly basis in any depression habitats containing water and the main channel in habitats <br />adjacent to designated sites. Fish collections will be made with an electroshocker, trammel nets, <br />fyke nets, seines, and minnow traps. Total lengths will be recorded from all fish. <br />The study design is structured to measure the response of the entire nonnative fish community <br />through target species. The target species include centrarchids, cyprinids, channel catfish, and <br />northern pike (Table 2). These target species were selected because they are known to have <br />detrimental effects on the endangered fishes and/or they are in high concentrations through out <br />' reaches in the Upper Colorado River Basin. The study design is presented in Table 2. Generally, <br />the sampling design was stratified into the various species, life stages, and available habitats. It is <br />sequenced both spatially and temporally. We envision that different techniques and efforts will be <br />required to monitor and evaluate the native and nonnative species response, however these <br />techniques can be employed during sampling for native fish. The sampling, design, therefore, has <br />' been stratified to focuses efforts between the different community components. We envision that <br />different intensities and different gear types (light traps for native species versus dip nets, small <br />mesh seines, etc for nonnative species) will de used. <br />' Fish Food Or anisms. Biweekly sampling will be implemented to establish the quantity and <br />g <br />diversity of macroinvertebrates occurring in natural and application floodplain wetlands. In <br />i addition, water quality parameters that effect these organisms will be measured from weekly <br />water samples using an autoanalyzer, and other water quality parameters will be measured using <br />Hydrolabs. <br />Physical Parameters and Vegetation. Physical and vegetative descriptions of natural and <br />application sites will be made at each site visit for fish sampling. These parameters will generally <br />not be made in the river main channel. In addition to the above listed parameters we envision that <br />different techniques will be required to breach or remove levees at different sites. We will rely on <br />the geomorphology/hydrology support project within the Habitat Restoration Program to evaluate <br />those different techniques for effectiveness. <br />Contaminants. Contaminant sampling will be made at each location at the same frequency as fish <br />sampling. <br />1 16
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