9499

• UCREFRP Catalog Number: 9499
• Author: Osmundson, D. B.
• Title: Removal of Non-native Centrarchids from Upper Colorado River Backwaters, 1999-2001
• USFW Year: 2003.
• USFW - Doc Type: Summary of Results.
• Copyright Material: NO

LIST OF TABLES
1. Total number of nonnative fish removed from backwaters in the
upper Colorado River, 1999-2001 ..................................... 8
LIST OF FIGURES
1. Map of the centrarchid-removal reach of the upper Colorado River ............ 5
2. Total number of non-native fish caught and removed from backwaters
by two-mile river segments using barge electrofishing, 1999-2001 ............. 9
3. Total number and mean number per backwater of largemouth bass
and green sunfish captured with barge-electrofishing during six
consecutive capture periods, 1999-2001 ................................ 10
4. Length-frequency (total length) of all largemouth bass captured (barge
and boat electrofishing) during each of six consecutive capture periods,
1999-2001 ...................................................... 11
5. Length-frequency (total length) of all green sunfish captured (barge and
boat electrofishing) during each of six consecutive capture periods,
1999-2001 ...................................................... 13
6. Total number of largemouth bass and green sunfish captured from
Horsethief Backwater (rm 154.5) with barge electrofishing on each
of six occasions, 1999-2001 ......................................... 14
7. Length frequency (total length) of largemouth bass and green sunfish
captured from Horsethief backwater during three seasons when
the backwater remained isolated from the main channel .................... 15
8. Annual catch-per-effort (fish/10 m2 seined) of largemouth bass and green
sunfish during ISMP monitoring, 1986-2001 ............................ 18
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