Evaluating the biological effectiveness of fully and partially protected marine areas

Table 12 The summary effect size $\bar{LnRR}$ 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

	(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]	Q_M = 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]	Q_M = 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]	Q_M = 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]	Q_M = 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]	Q_M = 2.54, p = 0.28

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 $\bar{LnRR}$ 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. $\bar{LnRR}$ > 0 means more fish inside the NTR; $\bar{LnRR}$ < 0 means fewer fish in the NTR. When the CI overlaps 0 it implies a non-significant difference between NTR and PPA. Q_M values indicate the magnitude of the difference between exploitation categories.

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