9489

• UCREFRP Catalog Number: 9489
• Author: Mueller, G.
• Title: The Role of Stocking in the Reestablishment and Augmentation of Native Fish in the Lower Colorado river Mainstream ‎(1998-2002)‎.
• USFW Year: 1998-2
• USFW - Doc Type: 03-288,
• Copyright Material: NO

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Contents (continued)

Page

1.2 Standing crop estimates of common fish species based on IS-minute visual surveys (n = 25) on
the Colorado River channel between Davis Dam and Lake Havasu during August 2000.................6

1.3 Summary of the location, effort, number, and species taken in the 2000 larval light trap effort....... 6

1.4 Summary of the location, effort, number, and species taken in the 2001 larval light trap effort....... 7

1.5 Summary of the location, effort, number, and species taken in the 2002 larval light trap effort....... 8

1.6 Summary of the movements of flannelmouth suckers determined by recaptures from 1999

to 2002 ..................................................... ..... ...... ......................... .................................................... .13

1.7 Population estimates for flannelmouth sucker based on multiple censuses using mark/recaptured
data from the 2002 sampling season. ....... ........... ......... ................. ...................... .............................. 15

1.8 Estimation of flannelmouth sucker and razorback sucker population size based on visual surveys
conducted in the Colorado River channel between Davis Dam and Lake Havasu during

August 2000.............. .............. ........................... .................................... .............. ........................ ..... 16

1.9 Summary of the number, length, and weight ranges of razorback suckers captured between

1999 and 2002 ........................ ............. ........... ....................................... .... ............................0.......... 17

1.10 Summary of the sexual condition and timing of male and female razorback suckers captured in
the Colorado River between Davis and Parker Dams 1999-2002 ....................................................18

5.1 Summary ofpossible survival factors with the conflicting survival strategies used by flannelmouth

and razorback suckers...................................................... .................. .................................. ............. 29

Figures

Page

1.1 General map of the study area showing dominant features located along the Colorado River
between Davis Dam and Lake Havasu ....:....................................................................................... 4

1.2 Timing of larval fish emergence in the Colorado River between Davis Dam and Lake Havasu
from February 19 to May 7, 2001 ................................................................................................... 8

1.3 Comparison of catch per unit effort (fish/100m2) of fish taken from the Colorado River by
3.7-cm inner panel trammel nets set near Topock Gorge (RM 27-40) and the Laughlin area

(RM 62-82) ..................................................... ...................................... ............................... ........... 10

1.4 Length distribution offlannelmouth suckers taken from spawning areas from 1999 to 2002.........11

111