Skip to main content

Table 8 Associations between moderators and effect sizes for the subset of studies for fish injury

From: What are the relative risks of mortality and injury for fish during downstream passage at hydroelectric dams in temperate regions? A systematic review

Moderator(s)AICcQEQM
(A) All intervention types (k = 83)
 Null model386.33
 Intervention type348.342387.78 (p < 0.0001)38.81 (p < 0.0001)
(B) Turbines (k = 37)
 Null model184.43
 Site type + assessment time177.15278.26 (p < 0.0001)13.56 (p = 0.001)
 Site type178.16301.69 (p < 0.0001)10.74 (p = 0.001)
 Site type + source + assessment time178.41277.87 (p < 0.0001)13.25 (p = 0.004)
 Site type + source179.66300.13 (p < 0.0001)10.83 (p = 0.005)
 Assessment time181.64318.58 (p < 0.0001)2.79 (p = 0.095)
 Source + assessment time182.04298.42 (p < 0.0001)3.29 (p = 0.193)
 Source184.62334.86 (p < 0.0001)0.481 (p = 0.488)
(C) General infrastructure (k = 20)
 Null model43.17
 Life stage41.736.71 (p = 0.992)19.72 (p < 0.0001)
 Assessment time44.0524.49 (p = 0.140)0.709 (p = 0.400)
  1. k: number of data sets (i.e., effect sizes); Site type: lab or field; Assessment time: < 24 h or ≥ 24–48 h (turbines), ≥ 24–48 h or > 48 h (general infrastructure); Source: hatchery or wild; Life stage: egg or juvenile. Null model = random-effects (unmoderated) model