9578

• UCREFRP Catalog Number: 9578
• Author: Hamilton, S. J. and e. al.
• Title: The Evaluation of Contaminant Impacts on Razorback Sucker Held in Flooded Bottomland Sites Near Grand Junction, Colorado - 1997.
• USFW Year: 2001.
• USFW - Doc Type: CAP6-WW,
• Copyright Material: NO

T ABLE OF CONTENTS

Page

LIST OF SU}.1MAR Y TABLES ........................................................................;....................... vi

LIST OF TABLES..... ............. .............................. ..................................................................... VI

LIST OF FIGURES.................................................................................................................... IX

LIST OF APPENDICES............................................................................................................. x

LIST OF KEYWORDS............................................ .................................................................. Xl

ACKNOWLEDGMENTS.......................................................................................................... XlI

EXECUTIVE SUMMARY ........................................................................................................ XUI

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

Endangered fish............................................................................................................... 1

Contaminant studies in the Colorado River basin........................................................... 1

Razorback sucker...................... ............................ ......... ........... ...................................... 5

Objective ... ........ ................ ..... ........................ ................................ .................................. 6

ADULT STUDY ......................................................................................................................... 7

Methods......................................:.................................................................................... 7

Site descriptions.................................................................................................. 7

Fish stocking and sampling ................................................................................. 16

Spawning............................................................................................................. 17

Informal observations of adult razorback sucker ................................................ 18
Water and sediment sampling............................................................................. 18
Inorganic element analyses................................................................................. 20

Statistics.............................................................................................................. 23

Results.................................... ...................................................... .'.................................. 24

Water quality.......... ................... ............. ..... ........................................................ 24

Selenium in water................................................................................................ 27

Other elements in water.................... ................................................................... 32

Selenium in sediment........................... ............................................................... 32

Other elements in sediment.... ..... .... ........... ......... .......... ...................................... 32

Sediment chemistry ......................................................... ............... ..................... 40

Selenium in biota................................................................................................. 40

Growth............................. .............. .............. .......................... .............................. 47

Selenium in tissues.............................................................................................. 47

Adult collection and spawning......................... .........; ............. ............................ 51

Selenium in eggs............................................................ ..................................... 51

Other elements in eggs.............. .......................................................................... 54

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