9713

• UCREFRP Catalog Number: 9713
• Author: VanHaverbeke, D.R.
• Title: Stock assessment and fisheries monitoring activities in the Little Colorado River within Grand Canyon during 2004.
• USFW Year: 2005.
• USFW - Doc Type: U.S. Fish and Wildlife Service
• Copyright Material: NO

TABLE OF CONTENTS
TABLE OF CONTENTS .......... ............. .................. ......... ...... ..... ......... ................. 3

LIST OF TABLES ................................. ...... ............ ................. ............. ................ 5

LIST OF FIGURES............................... ...... ..... ......................................... ............7

EXECUTIVE SU MMARY ............................... ............. ........ .......................... ........9

'INTRODUCTION ............. .................. .................................... ............................. 11

OBJ ECTIVES .... .............. ........... ....... ............................... .... ..................... ......... 12

METHODS... ........ ............... ............................................;........... .... .... ................ 13

Trips and Participating Personnel ............................................................13

Study Site................................................................................................. 13

Gear......................................................................................................... 13

Fish.......................................................................................................... 14

Water Quality .... ...... ..... ......................... .................... .................. ..... ........ 14

Mark-Recapture Analysis and Assumptions............................................. 14

SPRING RESULTS............ ........................................... ..'....... ............................18

Physical Parameters................................................................................ 18
Effort and Catch.. .......... ................................. .............................. ...... ......18
Species Composition ............................................................................... 18
Length Frequencies and Catch ................................................................18
Sexual Condition .......... .......... ....................................................... ........... 19

Predation.................................................................................................. 20

Parasites................ ~................................................................................. 20

Population Abundance Estimation ................................... ......... .......... .... .20

FALL RESULTS...................... ............. ............................................ ............ ......22

Physical Parameters...... ............................................................... ........... 22

Effort and Catch... ....... ............................................... .................. ............22

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