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Table 12 The summary effect size LnRR ¯ and [95% CI] based on density data for each ‘exploitation status’ categories (target-protected [TP], target-not protected [TNP] and non-target [NT]), weighted by sampling variances

From: Evaluating the biological effectiveness of fully and partially protected marine areas

  (a) All MPA case-studies included (b) Sensitivity analysis; habitat confounded studies excluded  
  Target - protected Target - non-protected Non-target Target - protected Target - non-protected Non-target  
  N = 9 N = 9 N = 7 N = 8 N = 5 N = 5  
rho = 0 0.35 [0.01 → 0.69] 0.37 [0.03 → 0.71] −0.21 [−0.58 → 0.16] 0.34 [−0.07 → 0.74] 0.47 [−0.07 → 1.02] −0.24 [−0.74 → 0.25] QM = 4.48, p = 0.11
rho = 0.2 0.35 [−0.02 → 0.72] 0.38 [0.03 → 0.73] −0.20 [−0.60 → 0.21] 0.33 [−0.11 → 0.78] 0.48 [−0.09 → 1.05] −0.23 [−0.78 → 0.32] QM = 3.58, p = 0.17
rho = 0.5 0.34 [−0.05 → 0.73] 0.39 [0.04 → 0.74] −0.17 [−0.61 → 0.26] 0.33 [−0.14 → 0.79] 0.48 [−0.1 → 1.06] −0.21 [−0.8 → 0.38] QM = 3.01, p = 0.22
rho = 0.8 0.33 [−0.07 → 0.74] 0.40 [0.05 → 0.74] −0.16 [−0.60 → 0.29] 0.32 [−0.16 → 0.8] 0.49 [−0.09 → 1.06] −0.19 [−0.81 → 0.42] QM = 2.69, p = 0.26
rho = 1 0.33 [−0.08 → 0.74] 0.40 [0.07 → 0.74] −0.15 [−0.66 → 0.30] 0.32 [−0.17 → 0.8] 0.49 [−0.08 → 1.06] −0.18 [−0.81 → 0.45] QM = 2.54, p = 0.28
  1. Results where different correlation coefficients (rho = 0, 0.2, 0.5, 0.8, 1) among individual species responses were used to compute the within-study sampling variance are given on separate rows. The LnRR ¯ and 95% CI are given for analysis using (a) all MPA case-studies, and (b) excluding MPAs with habitat confounded effects. N represents the number of MPAs for each exploitation category. LnRR ¯  > 0 means more fish inside the NTR; LnRR ¯  < 0 means fewer fish in the NTR. When the CI overlaps 0 it implies a non-significant difference between NTR and PPA. QM values indicate the magnitude of the difference between exploitation categories.