9304

• UCREFRP Catalog Number: 9304
• Author: Mueller, G., L. Boobar, R. Wydoski and K. Comella.
• Title: Aquatic Survey of the Lower Escalante River, Glen Canyon National Recreation Area, Utah; June 22-26, 1998.
• USFW Year: 1998.
• USFW - Doc Type: \
• Copyright Material: NO

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TABLE OF CONTENTS

Page

E)OECtrTfVES~)T ........ ..... ...... .......................... ...... iv

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

CHAPTER 1 -- INVERTEBRATES..(By Boobar) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4

METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4

RESULTS ........................................................... 4

DISCUSSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8

RECO~}il)~TIONS .... ... ....... ..... '" .,. ........... ..... .......8

REFERENCES .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8

CHAPTER 2 -- FISH..(By Mueller, Wydoski, Bradwisch) .......................... 10

METHODS .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . '.. 10

RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10

DISCUSSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 17

RECO~E}il)~TIONS .... ... ....... ...... ................ ...........19

REFERENCES ........................................................ 20

CHAPTER 3 -- AMPHIBIANS..(By Comella and Fridell) .......................... 22

METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 25

RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 25

DISCUSSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 28

RECO~}il)~TIONS ... .... ....... ... ... ......... .., .... ...........30

REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 31

APPE}il)ICES

~. PHOTOGRAPHS .................................................. 33

TABLES

Number
1.1

Page

Taxonomic list and abundance of aquatic macroinvertebrates
collected downstream of Harris Wash, Escalante River, Utah
- 06/22/98 through 06/24/98. ~bundance: QN=quantitative
(per meter squared), QL= Qualitative ................................ 5

1.2

Community summary statistics. ~bundance data is number
per meter squared for quantitative samples and number per
sample for qualitative samples. EPT = totals for the insect
orders, Ephemeroptera, Plecoptera, Trichoptera. MHBI =
Modified Hisenhoff Biotic Index. In site descriptor,
QL = qualitative and QN + Quantitative samples ....................... 6