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<br />
<br />Table of Contents
<br />
<br />Executive Summary",.,.,.".".........,.."".",."",.,....."...,....".",....,.,.".".".,.".,.,"",.".,',....,...., i
<br />
<br />Introduction,....".,....",.,.,."."........."..,.,."""."."....,.,.".."""..,....".,....,..",..,."".,.",..."",."., ]
<br />
<br />Animas.,..........,....."..""."........."",.,......,."."....,..."..",..,..,....".,....,.."...,.,.,..,.",....,."."., 2
<br />Study Area.."........,..."".""""""..,."."",.,.......".,..,.",..".".,..,..,.""...",.,.,.,.""....,',.,..,..,. 2
<br />Methods,...,........,.,...."'..."'........,....""... ,..,.,."..."..,.,......"..,..""..,.".""",.,.,.,'".,.,',....,."."., 3
<br />
<br />~w~".,',.,",..,..,.".".,.,.,...,.,...,."..,",..,.....,....,."..,.,."".",.".,..".,.".,.,',.,.,.,.,...,.",."".."",.,6
<br />
<br />Historical fish collections in tributaries ofthe San Juan River....................................... 6
<br />Fish Sampling 1950 - 1969 ...................................................................................:......... 6
<br />Fish Sampling 1970 - 1979 ............................................................................................. 8
<br />San Juan Tributaries downstream of Navajo Reservoir.............................................. 8
<br />San Juan Tributaries upstream of Navajo Reservoir..............,.................................. I3
<br />Fish Sampling 1980 - 1989 ........................................................................................... 15
<br />San Juan Tribl1taries Downstream of Navajo Reservoir........................................... 15
<br />San Jl1an Tributaries Upstream of Navajo Reservoir................................................ 16
<br />Fish Sampling 1990 - 1994 ........................................................................................... 17
<br />San Juan Tributaries Downstream of Navajo Reservoir........................................... 17
<br />San Juan Tributaries Upstream of Navajo Reservoir................................................ 18
<br />Fish Sampling 1995-1999 ....,....,.....,................................,............................................ 19
<br />
<br />Discussion......,...."."..,...,....,....."...,....,...,.,..,."'..".......,...,."'....,.,.".,..".....,.,.,..."'.,.".".,., 20
<br />
<br />Historical F ish Distribution",.,......"",.,..,."..."..,.......",.,.....,..",..,.,..""...,.,.",..........,.... 20
<br />
<br />Nati ve Fishes........,."."."..,.."...."."....,....,."..,..,."...,..".,..,.,.".,..,."".".,...,."..,.".,."., 20
<br />Non-native Fishes, ,.....,..".,'... .....,...,....', ,.,..' ,.. ......"...,..,..,.,.,..,.".,.".'.'...,' "..........,.,. 22
<br />CON CLUSIONS.,.".."",.....,....."...",......,.,.".",..".......",...",....,.,.."..".....".,...,.".."".,."., 26
<br />
<br />Literature Cited"......,....,.,.". .........."......,.,.."..,.".....,..,......"....,..."..."."".,.,...,",.......,..".. 2 7
<br />
<br />Appendix A..."..,..."."...,.,..,..".. ....",......"...,..."....,..,.."...,."....,..."...".,",.,.,.,.,.,",.....,.."..., I
<br />
<br />Draft Final Tributary Report
<br />Miller Ecological Consultants, Inc.
<br />
<br />January 31, 2000
<br />Page Iii
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