Laserfiche WebLink
Colorado squawfish were observed to be active at night and were found to occupy <br />run and riffle habitats presumably for foraging. During their evening forays squawfish <br />moved across shallow riffles (see passage section) taking temporary positions in the <br />shallower /faster habitats. Nighttime habitat availability was determined in the same <br />manner as daytime habitat, by using a probability function that was based on their <br />nighttime observations (Appendix 7, Table 2). <br />The inflection point for Strata 6, 8, and combined was 80, 150 and 150, <br />respectively (Figure 6). Strata 8 had higher night (foraging) squawfish WUA (run/riffle <br />habitat) at all flows. At 150 cfs, Strata 8 had 28% more WUA than Strata 6. This flow is <br />similar to the inflection point of runs and is also similar to the one found for resting <br />habitat. <br />140,000 - <br />120,000 <br />m <br />U. 100,000 <br />0 <br />80,000 <br />L <br />CL <br />C ^, 60,000 - <br />40,000 <br />L <br />Q <br />20,000 <br />..� . Str.h 6 -T.W S"t. 8 <br />I I I I I I I I I <br />I I I I I I I I I <br />I I I ..I• ' 'T -• I <br />I I I •• *- I I I <br />• �_.�•''� I I I I I I I <br />1 • I I I I I I I I <br />I I I I I I I I I <br />I I I I I I I I <br />I I I I I I 1 I I <br />0 <br />0 <br />50 100 150 200 250 300 350 400 450 500 <br />Modeled Flow (cfs) <br />Figure 6. Colorado Squawfish Foraging Habitat Flow Relationship for Strata 6 and <br />8. <br />35 <br />