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

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T ABLE OF CONTENTS (continued)

Page

Egg characteristics.. ........................ ..................................................................... 54

Informal observations of adult razorback sucker ................................................ 57

Discussion....................................................................................................................... 57

Water quality....... ................................................................................................ 57

Selenium and other elements in water................................................................. 60
Selenium and other elements in sediment and sedjment chemistry .................... 62

Selenium in biota................................................................................................. 65

Growth....................................... ................... ....................................................... 67

Selenium in tissues.............................................................................................. 68

Depuration of selenium from tissues...................... ................................. ............ 71

Spawning........ .... ...................... ............................................................. .............. 73

Selenium and other elements in eggs .................................................................. 73

Egg characteristics............................................................................................... 77

Informal observations of adult razorback sucker ................................................ 78

EGG STUDY .............................................................................................................................. 78

Methods........ ... ..................... ........................................................................................... 79

Results ............ ............. ........................................................ ............................................ 80

Discussion....................................................................................................................... 82

Deformities in eggs and larvae.................................................................... ........ 84

Inbreeding................................................... ~........................................................ 87

LARVAL FISH STUDY ............................................................................................................. 87

Methods............ ... ........... .... ........... ......... ......................................................................... 87

Informal observations of razorback sucker larvae .............................................. 90

Results....................................................................................................................... ...... 90

Selenium and other elements in water and zooplankton ..................................... 93

Types of zooplankton.............. ............................................................................ 97

Selenium in larvae........................................................................................ ......... 97

Growth and condition......................................................................................... 104

Survival.............................................................................................................. 104

Informal observations of razorback sucker larvae ............................................. 114

Discussion ........ .......... ............. ....................................................................................... 121

Water quality.. .................................................................................................... 121

Seleni um and other elements in water................................................................ 123
Selenium and other elements in zooplankton..................................................... 124

Brine shrimp............ ..... .... ......... ........................................... .............................. 125

Zooplankton ....................................................................................................... 129

Selenium in larvae.............................................................................................. 132

Growth............................ .................................................................................... 134

Survival .. ................................. .................................. ......................................... 135

Delayed mortality........... ................ ..................... ............................................... 136

Informal observations of razorback sucker larvae ............................................. 138

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