Fish Preference Curves for Verdema Velocity ( 1 0 0.00 2 0.05 1.00 3 0.15 0.02 4 0.25 0.00 5 0.35 0.00 6 0.45 0.00 7 0.5 0.00 8 2.0 0.00 9 12 0.00 ) Depth ( 1 0 0.00 2 0.05 0.96 3 0.15 0.36 4 0.25 0.62 5 0.35 0.62 6 0.45 1.00 7 0.55 0.19 8 0.65 0.00 9 0.75 0.11 10 0.85 0.00 11 0.95 0.00 12 1.05 0.00 ) Channel Index/Substrate ( 1 1 0.007 2 2 0.00 3 3 0.00 4 4 0.03 5 5 1.00 6 6 0.72 7 7 0.00 8 8 0.02 )