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<br />Table of Contents
<br />
<br />EXECUTIVE SUMMARY ,.......",......,..",..",..,....,........,.....,.."...."........".......,...........",..., i
<br />
<br />INTRODUCTION ..,",...,.....,...."......,...,..,..."......,........"...."....,.........,,.........,............."".., 1
<br />METHODS ",........".....",....,..,.,..."...."..,..",.....,.."..".",......,.........,..".......,..............,....."., 3
<br />Study Area..........,........",...,........"..,....",....,..,............."........, ,..."..........,.. ,..........,....".." 3
<br />Seven-Year Research Program.,..,......................",.....",.......,.....,.........""...............,..., 3
<br />Colorado Pikeminnow Habitat Use Study..,....,......,....................,......."..........,........... 6
<br />
<br />Radio Telemetry,..........,....,........",..,...... ,........,...........,..'.....,..,...... ..........,.....,..... .....".." 6
<br />RESULTS ,.."..........,..........,..,..,...................................,.".."..,.....,....,..........,.................,.. II
<br />1993 ..........".............."",.........,...,.........".........,.....,...... "'.....,..,...."....,.................,..... ,.. II
<br />Pre-spawn"..,....,..""......,...,............"............,...........,.......",.."...,...,......,.."....",..,...... 17
<br />Spawning..,......,.............."".........,......................,.......... ..........."'........................"..,,, 19
<br />River Mile 132,0 .........,........,..,..,.........,.........,........,......,"'..............,....,........,....".. 21
<br />River Mile 13l.l-Red Wash Side Channel............................,............................. 22
<br />Visual Sighting of Spawning Colorado Pikeminnow. ....,...........................,........... 24
<br />
<br />Post-spawn..... ................, .............,..,'...... ,....,.................."........................., ...........,.., 24
<br />1994 ..,...,...............,.......... ......,........,............,....,....."..........,.. ................ .........."....".., ,.. 26
<br />Winter,.,.,.." ,.. '."" ,. ,. ,. ". "",., ,.."" ""'" ,. ,.... ,."", "." ,....., ,..", ,." ,..", '... ,., ..,. "." " ,.,. "." ,." 28
<br />Pre-spawn.. .................,.......",......... ............., ..... ...... .....,..,.............. ................ ........,... 31
<br />Spawning..."............ .....,.........., ,......." ...........",.."............. ............, ............................ 36
<br />River Mile 132.0 ,....".,.."......"..,........".........................................................,.........37
<br />River Mile 13l.l-Red Wash Side ChanneL....................................................... 37
<br />
<br />Fall"".,."""",."",.....".,."".,.,.,.,.,."",.".,..."."".,....",.",.,......,.,.".,....,.,."".".".,.".", .,. 39
<br />1993 and 1994 Combined...,....,..................................................................,.........."......41
<br />
<br />Pre-spawn..,..................,................................,..........., .............,'....,...",..,............,...,.. 41
<br />Spawning., ,.. .,. ,."....:." ". ,'. ,. ,., ,.., "." ". .." ,.,.", ,'.".,... ,.,." '." ,..,., .,.. ,. .,." ,. '" '. ".. ,.., ,,'.. ,.." 45
<br />1998 - Stocked Adult Colorado Pikeminnow ..............,.............................,..................47
<br />
<br />Pre-spawn.. .......... ............, .............,'........,....,....,.. ,.........,.... ,....."..........".... ............... 51
<br />Spawning....... ........."........ .......".., ......,... ..... ................"..,...."..........,................. ........ 51
<br />River Mile I 68,4--Hatch Trading Post..,............................................................." 53
<br />
<br />DISCUSSION ....."........... ..........." ...,..,.................,........",.."..... ...... ..,.......,.....,..........,...... 57
<br />CONCLUSIONS.,...".".,..""".,.,.,."",.""....".,."."...,...".",..."...,."'..,....,.,,,........,.",,'....,., 60
<br />ACKNOWLEDGEMENTS ,..,.........................,............"..................................".............. 61
<br />
<br />LITERATURE CITED ,..........,......"..",..,....................................................",..........,....,.. 62
<br />
<br />Colorado Pikeminnow Habitat Use in the San Juan River, New Mexico and Utah
<br />Miller Ecological Consultants, Inc.
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<br />Pageiii
<br />January 31, 2000
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