6022

• UCREFRP Catalog Number: 6022
• Author: Bulkley, R. V., Charles R. Berry, Jr., Richard Pimental and Tamara Black.
• Title: Tolerance and Preferences of Colorado River Endangered Fishes To Selected Habitat Parameters
• USFW Year: 1981.
• USFW - Doc Type: Final Completion Report.
• Copyright Material: NO

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10. Relationship of preferred temperature (mean of
individual modes) to acclimation temperature
for Colorado squawfish. Final preferendum is the
point of intersection with the 45° line (ie. that
point where selected temperature = acclimation
temperature). Open circles represent juvenile
fish; solid circles adult fish ............................. 37
11. Relative frequency distribution of juvenile Colorado
squawfish in 8 compartments of TDS gradient device
(Figure 2) with and without gradient established.
Numbers I, II, and III are replicates for controls
and treatments. Number over vertical bar is conduc-
tivity in mmhos. Data on location and conductivity
are values 24 hr after start of experiment ................. 42
12. Relative frequency distribution of juvenile bonytail
chubs in 8 compartments of TDS gradient device
(Figure 2) with and without gradient established.
Numbers I, II, and III are replicates for controls
and treatments. Number over vertical bar is conduc-
tivity in mmhos. Data on location and conductivity
are values 24 hr after start of experiment .................. 44
1-3. Relative frequency distribution in 8 compartments
of the TDS gradient device for pooled data from
three treatments and three controls for each
species. Numbers above vertical bar are the range
of conductivity (mmhos) for that compartment over
the three treatments (Figures 11 and 12). ... ••••..•.•..... 45
14. Relative frequency distribution of juvenile humpback
chubs in 8 compartments to TDS gradient device
(Figure 2) with and without gradient established.
Numbers I, II, and III are replicates for controls
and treatments. Number over vertical bar is conduc-
tivity in mmhos. Data on location and conductivity
are values 24 hr after start of experiment,
N = 20, 8-12-cm fish/replicate... 47
15. Relative frequency distribution of juvenile
humpback chubs in 8 compartments to TDS gradient
device (Figure 2) with and without gradient
established. Numbers I, II, and III are
replicates for controls and treatments. Number
over vertical bar is conductivity in mmhos.
Data on location and conductivity are values
24 hr after start of experiment. N = 20
8-12-cm fish/replicate. Concentrations were
double those of previous tests .............................. 48
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