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<br /> <br /> u <br /> <br />l <br />l C <br />i <br />' • <br /> C <br /> <br />, Cr <br />I • <br /> LL <br />? T <br /> IS <br /> <br /> • <br /> 2 <br /> Cr <br /> <br />LL <br />LL <br />2 <br />r <br />u <br />c <br />• <br />0 <br />v <br />LL <br />St SA GR RU <br />Substrate <br />BA 5" 5C EU IF FU HI FrU 0 0.15 0.3 0.45 0.6 <br />Habitat Water Velocity (m/s) <br />Figure 1. Percent frequency of Age-0 Colorado squawfish collected <br />in various habitats, Green River, 1980. Substrate: <br />Sl=silt, SA=sand, GR=gravel, RU=rubble. Habitat: <br />BA=backwater, SH=shoreline, SC=side channel, ED=eddy, <br />IP=isolated pool, PO=pool, RI=riffle, RU=run. (n= 618, <br />habitats were sampled in proportion to their occurrence <br />in the study area). <br />E <br />0 <br />r 1 <br />m <br />Cr <br />N 1 <br />0 <br />a <br />• <br />0 <br />0 <br />V O <br /> <br />? <br />? •? <br />8 10 12 14 16 18 20 <br />Backwater Temperature 1°c) <br />Figure 2. Relationship of catch-per-effort of Age-0 Colorado squawfish <br />in backwaters to backwater temperature at three sites, Green <br />River, 1980 (46 shallow backwater, ¦ deep backwater, and <br />shallow backwater). <br />47 <br />Ik i <br />T <br />v <br />c <br />• <br />Cr <br />• <br /> <br />? <br />F-0.6 <br />.... <br />Water Depth (m)