Evaluating the biological effectiveness of fully and partially protected marine areas

Table 4 The response to protection ( $\bar{LnRR}$ [95% CI]) for each ‘exploitation status’ category (target-protected [TP], target-not protected [TNP] and non-target [NT]), using density data

	(a) All MPA case-studies included			(b) Sensitivity analysis; habitat confounded studies excluded
	TP	TNP	NT	TP	TNP	NT
	N = 29	N = 5	N = 10	N = 27	N = 5	N = 8
rho = 0	0.47 [0.22 → 0.72]	0.78 [0.18 → 1.38]	0.57 [0.17 → 0.97]	0.41 [0.21 → 0.61]	0.76 [0.30 → 1.22]	0.21 [−0.12 → 0.54]
rho = 0.2	0.47 [0.21 → 0.73]	0.81 [0.17 → 1.46]	0.59 [0.16 → 1.04]	0.41 [0.20 → 0.61]	0.80 [0.32 → 1.28]	0.19 [−0.19 → 0.56]
rho = 0.5	0.47 [0.20 → 0.74]	0.85 [0.17 → 1.52]	0.64 [0.17 → 1.12]	0.41 [0.20 → 0.62]	0.85 [0.34 → 1.35]	0.18 [−0.23 → 0.60]
rho = 0.8	0.47 [0.20 → 0.75]	0.87 [0.17 → 1.57]	0.68 [0.18 → 1.17]	0.41 [0.20 → 0.63]	0.88 [0.36 → 1.41]	0.19 [−0.26 → 0.63]
rho = 1	0.47 [0.19 → 0.75]	0.89 [0.18 → 1.60]	0.70 [0.20 → 1.20]	0.41 [0.20 → 0.63]	0.90 [0.36 → 1.44]	0.19 [−0.27 → 0.65]

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 summary effect size and 95% CI are given for analysis using (a) all PPA case-studies, and (b) excluding PPAs with habitat confounded effects. N represents the number of PPAs for each exploitation category. $\bar{LnRR}$ > 0 means more fish inside the PPA; $\bar{LnRR}$ < 0 means fewer fish in the PPA. When the CI overlaps 0 it implies a non-significant difference between PPA and non-protected area.

ISSN: 2047-2382