7870

• UCREFRP Catalog Number: 7870
• Author: Lentsch, L. D., et al.
• Title: Options For Selective Control Of Nonnative Fishes In The Upper Colorado River Basin - Final Report.
• USFW Year: 1996.
• USFW - Doc Type: \
• Copyright Material: NO

1956; Crawford 1957; Pierce et al. 1963; Johnson 1977). Other
control projects focus at an age-class or life-stage (e.g.,
spawning aggregations can be targeted for removal through
mechanical means).
Of the selective control projects that we reviewed,
approximately 50% were deemed successful by managers that applied
the treatments. Generally, the successful treatments followed
the process outlined in Figure 2. Aquatic managers reviewed
biology of the target species, evaluated available control
options that were adequate to overcome the constraints of the
systems they were working with, selected an appropriate method,
and monitored and evaluated their action. We have followed a
similar process for recommending appropriate approaches for
selective control nonnative fishes throughout the UCRB (see
Figure 3 for a map of the UCRB).
METHODS FOR CONTROLLING FISH
Successful application of methods for selective control of
undesirable fishes has challenged aquatic managers for decades.
The first documented attempt to control undesirable fish
populations occurred in 1914 when copper sulfate was used to
chemically treat a Vermont Lake (Titcomb 1914). It was not until
the 1930's, however, that the concept of controlling and
manipulating composition of fish communities started to be
extensively evaluated, developed, and refined. Rotenone
(chemical control) was used as a piscicide for the first time in
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