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<br />t R V2 Weekly average pH 1.0 <br /> during year under x 0.8 <br /> stable conditions. Q) <br /> -0 <br /> If frequent (diurnal), s:: <br /> ...... <br /> large (> 1.0 pH unit) >, 0.6 <br /> changes occur, 51 +> <br /> score should be 0.4 <br /> reduced by 10%. .0 <br /> <0 <br /> .j-l <br /> ::l 0.2 <br /> Vl <br /> 0.0 <br /> 0 2 4 6 8 10 <br /> pH <br /> R V3 Minimum dissolved 1.0 <br /> oxygen levels near <br /> sunrise during May x 0.8 <br /> Q) <br /> through August in -0 <br /> area of most suitable s:: <br /> ...... <br /> water temperature. >, 0.6 <br /> .j-l <br /> r- 0.4 <br /> .r- <br /> .0 <br /> <0 <br />t +> <br /> ::l 0.2 <br /> Vl <br /> 0.0 <br /> 0 2 4 6 8 10 <br /> mg/l <br /> R V4 Average of mean 1.0 <br /> weekly water tem- <br /> peratures at mid- x 0.8 <br /> Q) <br /> afternoon during -0 <br /> s:: <br /> July and August ...... <br /> (Adult and Juvenile). ~ 0.6 <br /> .0 0.4 <br /> <0 <br /> .j-l <br /> ::l 0.2 <br /> Vl <br /> 0.0 <br /> 0 10 20 30 40 <br />- Oc <br /> 27 <br /> <br /> <br /> <br />