Consequences of alternative management strategies below Shasta and Keswick dams on the Sacramento River, California, for Green Sturgeon and winter‐run Chinook Salmon under two different models of the influence of temperature on life‐stage‐specific drivers of Green Sturgeon minimum abundance and Chinook Salmon critical temperature (Tcrit) for egg‐to‐fry survival. Dark green cells indicate the highest scores for each species/hypothesis, and white cells are the worst performing alternatives. Normalized scores for Green Sturgeon are in parentheses, and the average scores by alternative are displayed to demonstrate performance if objective weights entirely favored one objective or the other (see Figure 4).
| Alternative | Green Sturgeon hypotheses | Chinook Salmon hypotheses | ||||||||
| 1. Sturgeon spawning | 2. Sturgeon spawning | 3. Sturgeon juvenile | 4. Sturgeon juvenile | Average | 1. Salmon Tcrit 11°C | 2. Salmon Tcrit 12.5°C | 3. Salmon Tcrit 11°C | 4. Salmon Tcrit 12.5°C | Average | |
| 1. Long‐term average management | 2,426 (0.04) | 2,426 (0.04) | 7,149 (0.66) | 7,149 (0.66) | 4,788 (0.35) | 0.33 | 1.00 | 0.33 | 1.00 | 0.67 |
| 2. Run of river | 7,886 (0.76) | 7,886 (0.76) | 9,721 (1.00) | 9,721 (1.00) | 8,804 (0.88) | 0 | 0 | 0 | 0 | 0 |
| 3. Sturgeon‐focused management | 5,745 (0.48) | 5,745 (0.48) | 9,595 (0.98) | 9,595 (0.98) | 7,670 (0.73) | 0.02 | 0.36 | 0.02 | 0.36 | 0.19 |
| 4. Salmon‐focused management | 2,085 (0) | 2,085 (0) | 6,052 (0.52) | 6,052 (0.52) | 4,069 (0.26) | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Alternative | Green Sturgeon hypotheses | Chinook Salmon hypotheses | ||||||||
| 1. Sturgeon spawning | 2. Sturgeon spawning | 3. Sturgeon juvenile | 4. Sturgeon juvenile | Average | 1. Salmon Tcrit 11°C | 2. Salmon Tcrit 12.5°C | 3. Salmon Tcrit 11°C | 4. Salmon Tcrit 12.5°C | Average | |
| 1. Long‐term average management | 2,426 (0.04) | 2,426 (0.04) | 7,149 (0.66) | 7,149 (0.66) | 4,788 (0.35) | 0.33 | 1.00 | 0.33 | 1.00 | 0.67 |
| 2. Run of river | 7,886 (0.76) | 7,886 (0.76) | 9,721 (1.00) | 9,721 (1.00) | 8,804 (0.88) | 0 | 0 | 0 | 0 | 0 |
| 3. Sturgeon‐focused management | 5,745 (0.48) | 5,745 (0.48) | 9,595 (0.98) | 9,595 (0.98) | 7,670 (0.73) | 0.02 | 0.36 | 0.02 | 0.36 | 0.19 |
| 4. Salmon‐focused management | 2,085 (0) | 2,085 (0) | 6,052 (0.52) | 6,052 (0.52) | 4,069 (0.26) | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
Consequences of alternative management strategies below Shasta and Keswick dams on the Sacramento River, California, for Green Sturgeon and winter‐run Chinook Salmon under two different models of the influence of temperature on life‐stage‐specific drivers of Green Sturgeon minimum abundance and Chinook Salmon critical temperature (Tcrit) for egg‐to‐fry survival. Dark green cells indicate the highest scores for each species/hypothesis, and white cells are the worst performing alternatives. Normalized scores for Green Sturgeon are in parentheses, and the average scores by alternative are displayed to demonstrate performance if objective weights entirely favored one objective or the other (see Figure 4).
| Alternative | Green Sturgeon hypotheses | Chinook Salmon hypotheses | ||||||||
| 1. Sturgeon spawning | 2. Sturgeon spawning | 3. Sturgeon juvenile | 4. Sturgeon juvenile | Average | 1. Salmon Tcrit 11°C | 2. Salmon Tcrit 12.5°C | 3. Salmon Tcrit 11°C | 4. Salmon Tcrit 12.5°C | Average | |
| 1. Long‐term average management | 2,426 (0.04) | 2,426 (0.04) | 7,149 (0.66) | 7,149 (0.66) | 4,788 (0.35) | 0.33 | 1.00 | 0.33 | 1.00 | 0.67 |
| 2. Run of river | 7,886 (0.76) | 7,886 (0.76) | 9,721 (1.00) | 9,721 (1.00) | 8,804 (0.88) | 0 | 0 | 0 | 0 | 0 |
| 3. Sturgeon‐focused management | 5,745 (0.48) | 5,745 (0.48) | 9,595 (0.98) | 9,595 (0.98) | 7,670 (0.73) | 0.02 | 0.36 | 0.02 | 0.36 | 0.19 |
| 4. Salmon‐focused management | 2,085 (0) | 2,085 (0) | 6,052 (0.52) | 6,052 (0.52) | 4,069 (0.26) | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Alternative | Green Sturgeon hypotheses | Chinook Salmon hypotheses | ||||||||
| 1. Sturgeon spawning | 2. Sturgeon spawning | 3. Sturgeon juvenile | 4. Sturgeon juvenile | Average | 1. Salmon Tcrit 11°C | 2. Salmon Tcrit 12.5°C | 3. Salmon Tcrit 11°C | 4. Salmon Tcrit 12.5°C | Average | |
| 1. Long‐term average management | 2,426 (0.04) | 2,426 (0.04) | 7,149 (0.66) | 7,149 (0.66) | 4,788 (0.35) | 0.33 | 1.00 | 0.33 | 1.00 | 0.67 |
| 2. Run of river | 7,886 (0.76) | 7,886 (0.76) | 9,721 (1.00) | 9,721 (1.00) | 8,804 (0.88) | 0 | 0 | 0 | 0 | 0 |
| 3. Sturgeon‐focused management | 5,745 (0.48) | 5,745 (0.48) | 9,595 (0.98) | 9,595 (0.98) | 7,670 (0.73) | 0.02 | 0.36 | 0.02 | 0.36 | 0.19 |
| 4. Salmon‐focused management | 2,085 (0) | 2,085 (0) | 6,052 (0.52) | 6,052 (0.52) | 4,069 (0.26) | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
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