Periodically harvested closures require full protection of vulnerable species and longer closure periods
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Periodically harvested closures (PHCs) are small fisheries closures with objectives such as sustaining fisheries and conserving biodiversity and have become one of the most common forms of nearshore marine management in the Western Pacific. Although PHCs can provide both short-term conservation and fisheries benefits, their potential as a long-term management strategy remains unclear. Through empirical assessment of a single harvest event in each of five PHCs, we determined whether targeted fishes that differ in their vulnerability to fishing recovered to pre-harvest conditions (the state prior to last harvest) and demonstrated post-harvest recovery benefits after 1 year of re-closure. For low and moderately vulnerable species, two PHCs provided significant pre-harvest benefits and one provided significant post-harvest recovery benefits, suggesting a contribution to longer-term sustainability. PHCs with a combination of high compliance and longer closing times are more likely to provide fisheries benefits and recover from harvest events, however, no benefits were observed across any PHCs for highly vulnerable species. We recommend PHCs have longer closure periods before being harvested and species that are highly vulnerable to fishing (e.g. large species of; grouper, wrasse and parrotfish) are avoided during harvests to avoid overexploitation and increase the sustainability of small-scale fisheries.
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Goetze, Jordan; Claudet, J.; Januchowski-Hartley, F.; Langlois, T.; Wilson, S.; White, C.; Weeks, R.; Jupiter, S. (2017)Periodically harvested closures (PHCs) are one of the most common forms of fisheries management in Melanesia, demonstrating multiple objectives, including sustaining fish stocks and increasing catch efficiency to support ...
Fish wariness is a more sensitive indicator to changes in fishing pressure than abundance, length or biomassGoetze, Jordan; Januchowski-Hartley, F.; Claudet, J.; Langlois, T.; Wilson, S.; Jupiter, S. (2017)Identifying the most sensitive indicators to changes in fishing pressure is important for accurately detecting impacts. Biomass is thought to be more sensitive than abundance and length, while the wariness of fishes is ...
Diver operated video most accurately detects the impacts of fishing within periodically harvested closuresGoetze, J.; Jupiter, S.; Langlois, T.; Wilson, S.; Harvey, Euan; Bond, T.; Naisilisili, W. (2015)Periodically harvested closures (PHCs) have become the most common form of spatial management in Melanesia. Despite their popularity, their effectiveness to sustain local fish stocks remains largely unknown. Here we test ...