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Marine reserve targets to sustain and rebuild unregulated fisheries

Krueck, Nils C, Ahmadia, Gabby N, Possingham, Hugh P, Riginos, Cynthia, Treml, Eric A and Mumby, Peter J 2017, Marine reserve targets to sustain and rebuild unregulated fisheries, PLoS biology, vol. 15, no. 1, pp. 1-20, doi: 10.1371/journal.pbio.2000537.

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Title Marine reserve targets to sustain and rebuild unregulated fisheries
Author(s) Krueck, Nils C
Ahmadia, Gabby N
Possingham, Hugh P
Riginos, Cynthia
Treml, Eric AORCID iD for Treml, Eric A orcid.org/0000-0003-4844-4420
Mumby, Peter J
Journal name PLoS biology
Volume number 15
Issue number 1
Article ID e2000537
Start page 1
End page 20
Total pages 20
Publisher Public Library of Science
Place of publication San Francisco, Calif.
Publication date 2017-01
ISSN 1544-9173
1545-7885
Keyword(s) animals
biodiversity
conservation of natural resources
fisheries
fishes
marine biology
larvae
coral reefs
marine fish
marine conservation
conservation science
science & technology
life sciences & biomedicine
biochemistry & molecular biology
biology
Summary Overfishing threatens the sustainability of coastal marine biodiversity, especially in tropical developing countries. To counter this problem, about 200 governments worldwide have committed to protecting 10%-20% of national coastal marine areas. However, associated impacts on fisheries productivity are unclear and could weaken the food security of hundreds of millions of people who depend on diverse and largely unregulated fishing activities. Here, we present a systematic theoretic analysis of the ability of reserves to rebuild fisheries under such complex conditions, and we identify maximum reserve coverages for biodiversity conservation that do not impair long-term fisheries productivity. Our analysis assumes that fishers have no viable alternative to fishing, such that total fishing effort remains constant (at best). We find that realistic reserve networks, which protect 10%-30% of fished habitats in 1-20 km wide reserves, should benefit the long-term productivity of almost any complex fishery. We discover a "rule of thumb" to safeguard against the long-term catch depletion of particular species: individual reserves should export 30% or more of locally produced larvae to adjacent fishing grounds. Specifically on coral reefs, where fishers tend to overexploit species whose dispersal distances as larvae exceed the home ranges of adults, decisions on the size of reserves needed to meet the 30% larval export rule are unlikely to compromise the protection of resident adults. Even achieving the modest Aichi Target 11 of 10% "effective protection" can then help rebuild depleted catch. However, strictly protecting 20%-30% of fished habitats is unlikely to diminish catch even if overfishing is not yet a problem while providing greater potential for biodiversity conservation and fishery rebuilding if overfishing is substantial. These findings are important because they suggest that doubling or tripling the only globally enforced marine reserve target will benefit biodiversity conservation and higher fisheries productivity where both are most urgently needed.
Language eng
DOI 10.1371/journal.pbio.2000537
Field of Research 06 Biological Sciences
11 Medical And Health Sciences
07 Agricultural And Veterinary Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2017, Krueck et al.
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30107447

Document type: Journal Article
Collections: School of Life and Environmental Sciences
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.