Figure 5. Predicted time (d) Chinook salmon and steelhead use to pass Lower Granite ladder by ΔT.

Estimates were model-averaged means (± se) from annual GLMs for each run. Salmon and steelhead start time was held constant at 12:00 (noon). Base of ladder water temperature was held constant at 10° (open circles), 12° (gray circles), and 15°C (black circles) for spring Chinook salmon, 14° (open circles), 16° (gray circles), and 20°C (black circles) for summer Chinook salmon, 16° (open circles), 18° (gray circles), and 20°C (black circles) for fall Chinook salmon, and 13° (open circles), 17° (gray circles), and 20°C (black circles) for steelhead. These values were the 10^th, 50^th, and 90^th percentiles of encountered temperatures for each run, rounded to the nearest degree. Note different y-axis scales.