7327

• UCREFRP Catalog Number: 7327
• Author: Johnson, J. E.
• Title: Status of Endangered and Threatened Fish Species in Colorado.
• USFW Year: 1976.
• USFW - Doc Type: T/N 280,
• Copyright Material: NO

Introduction
Several species and subspecies of fish native to the waters of Colorado
have been designated by the Secretaty of the Interior as threatened or
endangered. The latest list, United States List of Endangered Fauna,
1974, designates three species as endangered:
Scientific Name Common Name
1. Salmo clarki stomias
2. Gila cypha
3. Ptychocheilus Lucius
Greenback cutthroat trout
Humpback chub
Colorado squawfish
The Fish and Wildlife Service has yet to complete a threatened species
list for U.S., but will probably include most of the species on their
1973 publication "Threatened Wildlife of the United States." On the
threatened list for Colorado they included:
Scientific Name
l?i.mmr.n TT7mo
4. Salmo clarki virginalis Rio Grande cutthroat trout
and on the "Status - Undeterminined Fishes" list:
Scientific Name
5. Salmo clarki macdonaldi
6. Salmo clarki pleuriticus
7. Xyrauchen texanus
Common Name
Yellowfin cutthroat trout
Colorado cutthroat trout
Humpback sucker
In addition, the Endangered Species Act of 1973 gives individual states
the authority to designate and conserve those species they consider
threatened or endangered within state boundaries (Sec. 6,c). Colorado
Department of Natural Resources and Division of Wildlife (DOW) have
prepared a document "Endangered Animals Cooperative Agreement Applica-
tion; Legal Authority, Program Description and Proposed Research and
Management Plans" dated November, 1974, in compliance with Section 6 of
the Endangered Species Act, listing those species they believe in trou-
ble and spelling out preliminary management plans for restoration.
The State of Colorado's endangered species list for fish includes:
Scientific Name
1. Ptychocheilus lucius
2. Gila cypha
3. Gila elegans
4. Xyrauchen texanus
('_-_ TTnmo
Colorado squawfish
Humpback chub
Bonytail chub
Humpback sucker