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throughout my studies. His observations of sedimentation process at the <br />field site were particularly insightful and his recommendations to use scour <br />chains in an overflow channel above the spawning site provided important <br />information to the study. <br />I also thank Ray Tenney of the Colorado River Water District, <br />Glenwood Springs for helping arrange funding for sediment data collections <br />in 1996. I enjoyed participating in Water District studies on the Yampa and <br />Green River, Colorado squawfish spawning sites. Mike Harvey and Bob <br />Mussetter inspired my pursuit of physical studies on razorback sucker. I <br />appreciate the time Ray, Mike and Bob spent in the Fall, 1996 examining <br />razorback sucker spawning and nursery habitat. <br />I dedicate this dissertation to my wife Nancy. She took care of the <br />home front while I spent considerable time in the field. Raising two boys is <br />no easy task with dad away from home much of the time. Nancy has kept <br />me going through some rough times and has always been there to help when <br />needed. <br />I also am grateful to my two sons, David and Tom, for helping with <br />field work over the years. It made being away from home a little easier <br />when my sons could join me in the field. I'm sure they enjoyed the <br />experience as well, as they met some real characters and were part of some <br />l <br />memorable field trips. <br />viii