Analysis | Relative risk ratio (RR) | Absolute risk difference (RD) |
---|---|---|
(A) Global meta-analyses | ||
Fish injury (k = 104) | 3.17 (95% CI 1.74, 5.78); 217% | 0.093 (95% CI − 0.04, 0.22); 9.3% |
Immediate mortality (k = 162) | 3.35 (95% CI 2.38, 4.69); 235% | 0.122 (95% CI 0.05, 0.19); 12.2% |
Delayed mortality (k = 256) | Could not obtain stable results | Could not obtain stable results |
(B) Effects of moderators | ||
Fish injury | ||
Turbines (k = 54) | 5.06 (95% CI 1.95, 13.08); 406% | 0.100 (95% CI − 0.04, 0.24); 10.0% |
General infrastructure (k = 21) | 3.50 (95% CI 1.09, 11.27); 250% | 0.184 (95% CI − 0.01, 0.38); 18.4% |
Bypasses (k = 4) | 0.18 (95% CI 0.05, 0.65); -82% | − 0.099 (95% CI − 0.24, 0.04); − 9.9% |
Spillways (k = 4) | 8.92 (95% CI 1.56, 50.87); 792% | 0.199 (95% CI − 0.07, 0.46); 19.9% |
Immediate mortality | ||
Turbines (k = 136) | 3.83 (95% CI 2.74, 5.36); 283% | 0.134 (95% CI 0.06, 0.21); 13.4% |
General infrastructure (k = 4) | 4.71 (95% CI 1.85, 12.02); 371% | 0.074 (95% CI − 0.03, 0.18); 7.4% |
Bypasses (k = 8) | 1.11 (95% CI 0.53, 2.32); 11% | 0.056 (95% CI − 0.04, 0.15); 5.6% |
Sluice (k = 3) | 3.61 (95% CI 0.74, 17.54); 261% | 0.112 (95% CI 0.00, 0.22); 11.2% |
Spillways (k = 9) | 2.01 (95% CI 1.04, 3.89); 101% | 0.084 (95% CI − 0.00, 0.17); 8.4% |
(C) Taxonomic analyses | ||
Fish injury | ||
Alosa (k = 6) | 2.27 (95% CI 1.42, 3.61); 127% | 0.126 (95% CI 0.03, 0.22); 12.6% |
Lepomis (k = 8) | 3.63 (95% CI 0.91, 14.46); 263% | 0.351 (95% CI − 0.28, 0.98); 35.1% |
Oncorhynchus (k = 66) | 4.23 (95% CI 1.81, 9.85); 323% | 0.048 (95% CI − 0.16, 0.25); 4.8% |
Immediate mortality | ||
Alosa (k = 12) | 2.44 (95% CI 1.07, 5.53); 144% | 0.094 (95% CI − 0.05, 0.24); 9.4% |
Oncorhynchus (k = 128) | 3.37 (95% CI 2.31, 4.91); 237% | 0.098 (95% CI 0.02, 0.18); 9.8% |
Delayed mortality | ||
Alosa (k = 9) | 2.41 (95% CI 0.74, 7.85); 141% | 0.097 (95% CI − 0.00, 0.20); 9.7% |
Anguilla (k = 5) | 13.75 (95% CI 6.87, 27.51); 1275% | 0.292 (95% CI − 0.25, 0.84); 29.2% |
Salmo (k = 5) | 5.69 (95% CI 0.64, 50.65); 469% | 0.329 (95% CI − 0.20, 0.86); 32.9% |
Oncorhynchus (k = 208) | Could not obtain stable results | Could not obtain stable results |