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<br />Note: If V18 (optional salinity variable) is omitted, <br /> <br />2V~ + Vs + V, + V7 + VI <br />CWQ = 6 <br /> <br />Reproduction (CR). <br /> <br />CR = (VI x V10 x V1z)1/3 <br /> <br />Other (COT). <br /> <br />Vll + V13 <br /> <br />V3 + <br />COT = <br /> <br />2 <br />2.5 <br /> <br />+ 1/2 V14 <br /> <br />HSI determination. <br /> <br />_ 1/4 <br />HS~ - (CF,C x CWQ x CR x COT) <br /> <br />If CWQ is s 0.4, the HSI equals the lowest of the following: <br />CWQ or the above equation. <br /> <br />Lacustrine Model <br /> <br />These equations utilize the life requisite approach and consist of four <br />components: food; cover; water quality; and reproduction. <br /> <br />Food (CF). <br /> <br />GF = V 15 <br /> <br />Cover (CC). <br /> <br />Cc = (V1 x V1S) 1/2 <br /> <br />e <br /> <br />15 <br />