6012

• UCREFRP Catalog Number: 6012
• Author: Miller, W. H., D. L. Archer, H. M. Tyus and K. C. Harper.
• Title: Colorado River Fishery Project
• USFW Year: 1982.
• USFW - Doc Type: Final Report.
• Copyright Material: NO

Definition of Terms
Life history terms
Adult A fish capable of reproduction.
Juvenile Fish from year old up to but not including
adults (synonyms: immatures and subadults).
Postlarva Fish with yolk sac absorbed, and loss of
larval and gain of adult appearance.
Young-of-year Fish up to one year of age.
Bioassay terms
LC50 Median lethal concentration that kills 50X
of test fish.
Specific Electrical conductivity of water measured in
Conductance Micromhos per centimeter and corrected to 25°c.
Braiding Multiple side channels that appear to be
intertwined.
Hydrologic station Area where physical habitat simulation
measurements made.
RM River mile from mouth of river.
Stratum Geomorphologically homogeneous section of
river selected for random statistical sampling
of fishes (see 1979 Annual Report).
Travertine CaCO deposited from lime rich springs super-
saturated with C02.
Habitat Lypes
Backwater A body of water off the main channel with no
measureable velocity; often created by a drop
in water level which stops the flow through a
former side channel or low-lying area.
Eddy A portion of the stream with a distinct
whirlpool effect.
Intermittent Small, natural, usually ephemeral stream that
tributary enters river.