Ongoing effects of no-take marine reserves on commercially exploited coral trout populations on the Great Barrier Reef |
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| Institution: | 1. GMA — Gesellschaft für Marine Aquakultur mbH, Büsum, Germany;2. Institute of Animal Breeding and Husbandry, Christian-Albrechts-University, Kiel, Germany;1. Instituto de Ciencias Marinas de Andalucía (ICMAN-CSIC), Puerto Real, Cádiz, Spain;2. Centro de Ciências do Mar do Algarve (CCMAR), Universidade do Algarve, Faro, Portugal;3. SPAROS Lda, Área Empresarial de Marim, Olhão, Portugal;1. Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan;2. Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan;3. Kagawa Prefectural Fisheries Experimental Station, Takamatsu, Kagawa 761-0111, Japan |
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| Abstract: | Networks of no-take marine reserves (NTMRs) are widely used for managing marine resources. Because they restrict fishing, managers need to monitor reserves to reassure stakeholders that they are achieving the intended results. In 2004, the Great Barrier Reef (GBR) Marine Park was rezoned and the area of NTMRs was greatly increased. Using manta tow we assessed the effectiveness of the new NTMRs in conserving coral trout (Plectropomus and Variola spp.), the principle targets of the GBR reef line fishery. Over a six year period, we sampled regional groups of matched pairs of similar reefs, ones closed to fishing under the rezoning and ones that remained open. Coral trout populations were significantly higher in NTMRs. While coral trout populations declined on reefs open to fishing, stocks were maintained in NTMRs, highlighting the ongoing benefits of marine reserves. |
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