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;~b. _ . , <br />-_ ~ , '~.~, .. o. ~_ ._ <br />WESTWATER CANYON: 1992-1996 <br />CHUB HATCHING DATES VS PEAL( FLOW <br />~~ <br /> <br />Z 210 <br />g 20Q <br />~ 19G <br />F- <br />0 180 <br />~ 1T0 <br />_ ~~ <br />--------- VYatwusr R sq. ~ 96; p ~ A04 ~/~' <br />----------------- ~~~ :...__ f ~ ~ ~-~-._.. <br />~ _ ~ ~ /1bo~e C~nJon $ sq. ~ .T2 <br />~ 50 ~-- <br />10000 <br />20000 30000. 40000 <br />PEAK FLOW (cfs) ~ STATEUNE GAGE <br />f- Westwate~ • Above Wnyon <br />50000 <br /> <br />Figure 4. Correlation of YOY chub hatch dates for the above canyon. and canyon sub-reaches <br />plotted against respective spring peak flow as recorded at the State Line gage.... Least.s~uares <br />regressions lines were hand drawn The outlier was the 1993. data point...., <br />Growth of Age 0 Chubs <br />Young of the year chub daily growth rates (mm /day) were calculated for the months of July and <br />August when sample sizes exceeded 5 fish on two occasions per month. Monthly growth rates <br />ranged from a project low of 0.15 recorded above the canyon during August, 1995 to a high of <br />0.83 is the canyon during August, 1994. A positive correlation (RZ = 0.59; p~.02) was found <br />between the monthly growth rates and respective monthly degree. days (>20C) (Figure 5). <br />~~ <br />DRAFI - <br />.' 11 <br />