8017

• UCREFRP Catalog Number: 8017
• Author: U.S. Department of the Interior, B. o. R.
• Title: Finding of No Significant Impact, Management and Control of Nonnative Fish Species in Floodplain Ponds along the Upper Colorado and Gunnison Rivers.
• USFW Year: 1998.
• USFW - Doc Type: Denver, CO.
• Copyright Material: NO

Topic

II.

TABLE OF CONTENTS

Paqe

Li st of Figures
List of Tables.

iv

v

I.

PURPOSE AND NEED

1
1
1
2
4

A. General

B. Purpose
C. Need. .

D. Background Information

1. Recovery Program. 4

2. Recovery Issue Discussed in this Draft
Environmental Assessment . . . . 5

(A) Introduction of Nonnative Fishes into
the Upper Colorado River Basin 5

(B) Impacts of Nonnative Fish Introductions
on Native Fishes. . . . . . . .. 5

(1) Impacts of Predation on Native
Fish Fauna. . . ., .... 6

(2) Impacts of Competition on Native
Fish Fauna 6

ALTERNATIVES CONSIDERED

7

A. Alternative 1 - No Action 7

B. Alternative 2 - Mechanical or Chemical
Control of Nonnative Fish Species From Ponds
in the Floodplain . . . . . . . . . . . .. 7

C. Alternative 3 - Install Mechanical Devices in
Outlets of Ponds of the Floodplain to Prevent
Chronic Escapement of Nonnative Fish Species 7

D. Alternative 4 - Slope the Bottom of Ponds in
the Floodplain and Reconnect the Ponds with
the Rivers . . . .. .......... 7