Temperate marine protected area provides recruitment subsidies to local fisheries

Le Port, A., Montgomery, J.C., Smith, A.N.H., Croucher, A.E., McLeod, I.M., and Lavery, S.D. (2017) Temperate marine protected area provides recruitment subsidies to local fisheries. Proceedings of the Royal Society of London Series B, Biological Sciences, 284 (1865). 20171300.

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The utility of marine protected areas (MPAs) as a means of protecting exploited species and conserving biodiversity within MPA boundaries is supported by strong empirical evidence. However, the potential contribution of MPAs to fished populations beyond their boundaries is still highly controversial; empirical measures are scarce and modelling studies have produced a range of predictions, including both positive and negative effects. Using a combination of genetic parentage and relatedness analysis, we measured larval subsidies to local fisheries replenishment for Australasian snapper (Chrysophrys auratus: Sparidae) from a small (5.2 km(2)), well-established, temperate, coastal MPA in northern New Zealand. Adult snapper within the MPA contributed an estimated 10.6% (95% CI: 5.5-18.1%) of newly settled juveniles to surrounding areas (approx. 400 km(2)), with no decreasing trend in contributions up to 40 km away. Biophysical modelling of larval dispersal matched experimental data, showing larvae produced inside the MPA dispersed over a comparable distance. These results demonstrate that temperate MPAs have the potential to provide recruitment subsidies at magnitudes and spatial scales relevant to fisheries management. The validated biophysical model provides a cost-efficient opportunity to generalize these findings to other locations and climate conditions, and potentially informs the design of MPA networks for enhancing fisheries management.

Item ID: 51541
Item Type: Article (Research - C1)
ISSN: 1471-2954
Keywords: marine protected area, larval subsidies, parentage analysis, biophysical modelling, sea bream, fisheries management
Funders: Thanksgiving Foundation (TF)
Projects and Grants: TF grant no. 3627250
Date Deposited: 15 Nov 2017 07:48
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8302 Fisheries - Wild Caught > 830204 Wild Caught Fin Fish (excl. Tuna) @ 100%
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