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<br />,- ) <br />,,--, <br /> <br />CONTENTS <br /> <br />Paae <br /> <br />TABLES ............................................,.... ix <br /> <br />FIGURES ..............'................................ xii <br />ACKNOWLEDGMENTS, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , ... xviii <br /> <br />CHAPTER ONE: INTRODUCTION .............................. 1 <br />PHYSICAL DESCRIPTION .................................. 1 , <br /> <br />Subdivisions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 <br />Geology . . . . . . . . . . . . . . . . . . . . . . , '. . . . . . . . . . . . . . . . , . , . 5 <br /> <br />Climate .,..................................,.',.... 5 <br />STUDIES DONE IN THE UPPER BASIN ...............,......, 6 <br />EXISTING AND PROPOSED WATER PROJECTS . . . . , . . . . . . . , . . . . , . . 9 <br />POTENTIAL IMPACTS OF WATER DEVELOPMENT. . . . . . . . . , . . .. 11 <br />RECOVERY IMPLEMENTATION PROGRAM .................,. 13 <br /> <br />CHAPTER TWO: LEGAL AND INSTITUTIONAL CONSTRAINTS ...'.... 16 <br /> <br />') <br /> <br />CHAPTER THREE: HYDROLOGY ,....,.....,....,.........'.' 22 <br />SPECIES RESPONSE TO FLOW .".'..........,...."'..,, 22 <br />Spawning .............,..............,....",.,., 22 <br />Migration and spawning cues ....,.....'......,..", 22 <br />Hybridization ........... . . . . . . . . . . . . . . . . . . . . . . .. 25 <br />Competition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 26 <br />Reproductive success ............................ 28 <br />Seasonal flow needs ..........................." 31 <br />Site specific flow recommendations . . . . . . . . . . . . . . . . . .. 39 <br />Larval Survival ..................................... 39 <br />Colorado squawfish " . . . . . . . . . . . . . . . . . . . . . . . . . . .. 39 <br />Humpback chub ................................ 42 <br />Razorback sucker .............................,. 43 <br />Bonytail chub ................................,. 44 <br /> <br />Growth .......................................... 44 <br />FGod Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 44 <br />Biotic Interactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 45 <br />Colorado squawfish . . . . . . . . . . . . . . . ' . . . . . . . . . , . . .. 45 <br />All four rare fishes ............................... 46 <br />Habitat Availiability ...............................,.. 47 <br />All four rare fishes .........,................'.... 47 <br />Colorado squawfish . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 48 <br />Humpback chub .,...............'..........,.., 50 <br /> <br />') <br />