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Last modified
7/14/2009 5:02:33 PM
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5/17/2009 11:02:42 PM
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UCREFRP
UCREFRP Catalog Number
8185
Author
Valdez, R. A. and B. R. Cowdell.
Title
Annual Summary Report-1992\
USFW Year
1993.
Copyright Material
NO
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />TABLE OF CONTENTS <br /> <br />Pa2e <br /> <br />EXECUTIVE SUMMARY ......................................................... ill <br /> <br />ACKN'OWLEDGEMENTS ........................................................ viii <br /> <br />1.0 INTRODUcrION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1 <br /> <br />1.1 OBJECflVES ...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1 <br /> <br />1.2 BACKGROUND........................................................ 1 <br /> <br />2.0 MElHODOLOGY ............................................................ 2 <br /> <br />3.0 RESULTS ................................................................... 4 <br /> <br />3.1 REACH 3 - THE LOWER GREEN RIVER .................................. 4 <br /> <br />3.1.1 1987 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4 <br /> <br />3.1.2 1988 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4 <br /> <br />3.1.3 1989 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 <br /> <br />3.1.4 1990 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 <br /> <br />3.1.5 1991 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 <br /> <br />3.1.6 1992 Year Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 <br /> <br />3.1.7 Sympatric Species .................. .'. . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 <br />3.2 REACH 4 - THE UPPER GREEN RIVER . . . . . . '. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 <br /> <br />3.2.1 1989 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 <br /> <br />3.2.2 1990 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 <br /> <br />3.2.3 1991 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 <br /> <br />3.3 REACH 1 - THE LOWER COLORADO RIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 <br /> <br />3.3.1 1987 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 <br /> <br />3.3.2 1988 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 <br /> <br />3.3.3 1989 Year Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8 <br /> <br />3.3.4 1990 Year Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8 <br /> <br />3.3.5 1991 Year Class. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8 <br /> <br />4.0 DISCUSSION ........................,....................................... 16 <br /> <br />4.1 HYPOTI-IESIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 16 <br /> <br />4.1.1 Ho 1: Age-O Colorado squawfish use habitats unavailable to conventional <br /> <br />seining methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 16 <br /> <br />4.1.2 Ho 2: Age-O Colorado squawfish move or are transported downstream into <br />and from the study region. .................................. 17 <br />4.1.3 Ho 3: Age-O Colorado squawfish are lost to overwinter mortality from <br />starvation, disease, parasites, etc. ............................. 19 <br /> <br />4.2 SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 21 <br /> <br /> <br />5.0 RECOMMENDATIONS ....................................................... 22 <br /> <br />LITERATURE CITED ........................................................... 23 <br /> <br />UST OF APPENDICES <br /> <br />APPENDIX A - LENGlH FREQUENCY HISTOGRAMS AND DISTRffiUTION CHARTS <br /> <br />iv <br />
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