7086

• UCREFRP Catalog Number: 7086
• Author: U.S. Fish and Wildlife Service.
• Title: Indexed, Annotated Bibliography of the Endangered and Threatened Fishes of the Upper Colorado River System.
• USFW Year: 1977.
• USFW - Doc Type: Denver, Co.
• Copyright Material: YES

failed when total hard water lead concentrations
were used.
118. Deacon, J. E. 1968. Endangered non-game ENDANG. FISH
fishes of the West: causes, prospects and HABITAT
importance. Proceedings of the Western DESCRIPTION
Association of State Game and Fish Commis- SPECIES LIST
sinners 48:534-549.
A description of the known status of rare,
threatened, or endangered fishes west of the
Rocky Mountains is presented. Fifty-five taxa
are considered. Causes and times of declines
in species numbers are discussed. The philosophy
and reasons for preservation of endangered and
threatened forms is briefly summarized.
119. Dexter, W. D.
treatment
Wyoming.
State Gam
197.
1965. Some effects of rotenone INVERTEBRATES
on the fauna of the Green River, FISH
Froceedings Western Association HABITAT ALT.
e and Fish Commissioners 45:193- MANAGEMENT
TOXICANT
GREEN R.
The rotenone treatment of the river almost
completely destroyed the invertebrate fauna
that was present prior to treatment. In the
upper ten miles of the treated area, the inverte-
brate population has made a gradual recovery to
pretreatment levels. Below the ten mile mark,
the invertebrate fauna of the river was virtually
nonexistent until the spring of 1963 when a
small population appeared. Since then, fluctu-
ation in numbers and changes in composition of
the invertebrate population have been noted.
Except in a few backwater areas, the rotenone
treatment produced an excellent kill of fish in
the entire river. Downstream different fish
species have been observed since the treatment.
120. Dieffenbach, W. H. 1964. Taxonomy and selected ENDANG. FISH
life history of the cutthroat trout (Salmo LIFE HISTORY
clarki Richardson) of the South Platte TAXONOMY
drainage, Colorado. M.S. thesis, Colorado AGE AND GROWTH
State University, Fort Collins. 49 pp. DISTRIBUTION
5
This study determined as accurately as possible
the original description of the cutthroat trout
that was found in the South Platte drainage and
55_