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8/11/2009 11:32:57 AM
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UCREFRP
UCREFRP Catalog Number
7824
Author
Miller, W. H., et al.
Title
Colorado River Fishery Project, Part III, Final Report, Contracted Studies.
USFW Year
1982.
USFW - Doc Type
\
Copyright Material
NO
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CONTENTS, Continued <br />2. Spawning Behavior, Habitat Selection, and Early_ <br />Life History of Northern Squawfish with <br />Inferences to Colorado Squawfish <br /> Page <br />Introduction . . . . . . . . . . . . ... . . . . . . . . . . . . 47 <br />Study area . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 <br />Spawning biology . . . . . . . . . . . . . . . . . . . . . . . 49 <br />Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 <br />Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 <br />Spawning behavior . . . . . . . . . . . . . . . . . . . . . 51 <br />Seasonal timing . . . . . . . . . . . . . . . . . . . . . . 52 <br />Site preferences . . . . . . . . . . . . . . . . . . . . . . 53 <br />Spawning-related movements . . . . . . . . . . . . . . . . . 62 <br />Spawning population characteristics . . . . . . . . . . . . 63 <br />Habitat selection . . . . . . . . . . . . . . . . . . . . . . . . 66 <br />Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 <br />Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 <br />Young-of-the-year . . . . . . . . . . . . . . . . . . . . 69 <br />Juveniles . . . . . . . . . . . . . . . . . . . . . . . . . 75 <br />Subadults . . . . . . . . . . . . . . . . . . . . . . . . . 79 <br />Adults . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 <br />Early life history . . . . . . . . . . . . . . . . . . . . . . . . 87 <br />Methods . . . . . . . . . . . . . . . . . . . . . . . . . . 87 <br />Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 <br />Progression in habitat selection . . . . . . . . . . . . . . 87 <br />Growth and development . . . . . . . . . . . . . . . . . . . 88 <br />Food and feeding . . . . . . . . . . . . . . . . . . . . . . 91 <br />Laboratory behavioral comparisons . . . . . . . . . . . . . . . . 100 <br />Methods . . . . . . . . . . . . . . . . . . . . . . . . . fw100 <br />Results . . . . . . . . . . . . . . . . . . . . . . . . . . 104 <br />Literature cited . . . . . . . . . . . . . . . . . . . . . . . . . 109 <br />Appendix A - Additional spawning site selection information . . . 111 <br />Appendix B - Habitat and microhabitat observation data . . . . . . 121 <br />3. Culture of Endangered Colorado River Fishes - Section I <br />Induced Spawning and Culture of the Humpback. Chub <br />and Bonvtail Chub Hybrids <br />Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 <br />Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 <br />Broodstock . . . . . . . . . . . . . . . . . . . . . . . . . . 130 <br />Hatchery system . . . . . . . . . . . . . . . . . . . . . . . . 130 <br />Injecting procedures . . . . . . . . . . . . . . . . . . . . . 131 <br />Egg stripping procedures . . . . . . . . . . . . . . . . . . . 131 <br />Transportation procedures . . . . . . . . . . . . . . . . . . . 131 <br />Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 <br />Humpback Chub . . . . . . . . . . . . . . . . . . . . . . . . . 132 <br />Bonytail x Roundtail . . . . . . . . . . . . . . . . . . . . . 133 <br />Spawning . . . . . . . . . . . . . . . . . . . . . . . . . . 133 <br />Egg and fry development . . . . . . . . . . . . . . . . . . 133 <br />• <br />• <br />• <br />ii
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