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Last modified
7/14/2009 5:02:34 PM
Creation date
6/1/2009 12:01:29 PM
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UCREFRP
UCREFRP Catalog Number
8290
Author
Day, K. S. and C. Crosby.
Title
An Assessment of Young-of-the-Year Colorado Squawfish (Ptychocheilus lucius) Use of Backwater Habitats in the Green River, Utah.
USFW Year
1997.
USFW - Doc Type
FG-33,
Copyright Material
NO
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3) Backwater area and volume available at Ouray NWR were negatively related <br />flows in the preceding spring for all seasons. No relation existed betty <br />backwaters available and spring flows. <br />4) Catch-per-unit-effort of Colorado squawfish could not be related to spri <br />was true for most species captured. Colorado squawfish catch was positi <br />with bluehead sucker catch, and showed a weak, positive correlation with <br />minnow catch. <br />5) It is recommended that periodic high spring flows be pursued to rebuild <br />and reestablish secondary channel backwaters used by Colorado squawfish. <br />rebuilding event should be followed with several years of variable flow <br />maintaining channel diversity and secondary channel backwaters. Determi <br />events and timing should be based on geomorphologic and hydrologic studi <br />completed concurrently. <br />6) ISMP young-of-the-year sampling does not need modification. Two possibl <br />may be entertained, however. These include a measure of turbidity and d <br />minimum depth restriction to 0.20-0.25 m. <br />7) Other species of native fish show different responses to spring flows an <br />Although not fully addressed here, it is recommended that the final Gree <br />regime take this into account. Variability is likely the best scenario <br />management of the entire system. <br />
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