9714

• UCREFRP Catalog Number: 9714
• Author: Ward, D., and W. Persons.
• Title: Little Colorado River fish monitoring 2004 annual report.
• USFW Year: 2005.
• USFW - Doc Type: Arizona Game and Fish Department.
• Copyright Material: NO

TABLE OF CONTENTS
EXECUTIVE SUMMARY (WHAT'S NEW IN 2004).............................................................. 4

INTRODUCTI ON .............;........................................................................................................... 5

STUDY SITE................................................................................................................................. 5

METHODS ....................................................................................................................................5

RESULTS ...................................................................................................................................... 7

Native species.............................................................................................................................. 7

Humpback chub .................................................................................................................. 7

Flannelmouth sucker .,. ....... ...... ..... .... .... ....... .... .... ........... ..... .... ...... ... ............. ............... ...... 8

Speckled dace...................................................................................................................... 8

Nonnative species........................................................................................................................ 8

DISCUSSION ................................................................................................................................ 9

Native species.............................................................................................................................. 9

Nonnative species. ..................................................................................................................... 11

Long-term catch trends............................................................................................................: 11

TABLES.. ........... .......... .... ....... ...... .............. ..... ......................... ........ ........................... ................ 15

Table 1. Little Colorado River hoop netting effort by year, 1987 - 2004. ..............................15

Table 2. Trip dates and number of net sets 1987 -2004........................................ ................... 15

Table 3. Catch by species, lower 1200 m hoop net monitoring, Little Colorado River,
April 9 - May 3,2004. Total effort = 7,165.46 net hours. ....................................................... 16

Table 4. Numbers of fish scanned, tagged, and recaptured by species during LCR lower 1200
meter hoopnet monitoring, 2004............................................................................................... 16

Table 5. Total Catch of species by year, LCR standardized hoop net monitoring

1987 - 2004............................................................................................................................... 17

Table 6. Catch per 24 hours of hoop net effort in the LCR by year, 1987-2004. .................... 17
Table 7. Catch of predators and stomach contents examined during 2004 LCR sampling..... 17
Table 8. Lengthfrequency distributions offish collected during LCR sampling,

April 9 - May 3, 2004. ..............................................................................................................18

Table 9. Humpback chub detected by remote PIT tag antenna. .............................................. 19

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