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Ecologically Sustainable Exploitation Rates-A multispecies approach for fisheries management
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering. Swedish Univ Agr Sci, Sweden.
Swedish Univ Agr Sci, Sweden.
Swedish Univ Agr Sci, Sweden.
2019 (English)In: Fish and Fisheries, ISSN 1467-2960, E-ISSN 1467-2979Article in journal (Refereed) Epub ahead of print
Abstract [en]

Fisheries management is slowly evolving from its traditional single-species focus to a more holistic ecosystem-based approach. Yet, limits for exploitation are almost always set based on single-species models, treating species as isolated entities. This is problematic since the sustainability of a fishery hinges on its effects on the exploited community as a whole. Here, we develop a novel analytical approach of estimating exploitation rates that are sustainable with respect to the state of whole fish communities. Our approach simultaneously addresses species interactions, environmental covariates and natural variability of population sizes, yet it is framed around a simple and accessible objective. We derive Ecologically Sustainable Exploitation Rates, that is exploitation rates associated with a maximum acceptable probability (determined by management) that any interacting species decreases to an unacceptably low population size. Using models fitted to an exploited fish community, we show how accounting for species interactions constrains the possibilities for ecologically sustainable exploitation. The conventional omission of species interactions may thus result in overestimated exploitation limits. Moreover, our application rendered a counterintuitive result: it suggests that the exploitation of one species should increase, as compared to mean historical levels, for the purpose of conservation of the community as a whole. Such insights could impossibly be gained using single-species approaches, illustrating the need to adopt multispecies models in fisheries management. Analytical derivation of Ecologically Sustainable Exploitation Rates offers a mean to do so.

Place, publisher, year, edition, pages
WILEY , 2019.
Keywords [en]
multispecies exploitation; multispecies objective; reference points; statistical modelling; stock assessment; viability modelling
National Category
Ecology
Identifiers
URN: urn:nbn:se:liu:diva-159254DOI: 10.1111/faf.12390ISI: 000476053300001OAI: oai:DiVA.org:liu-159254DiVA, id: diva2:1340839
Note

Funding Agencies|Linkoping University; Swedish Research Council FORMAS [2017-00433, 217-2013-1315]; Swedish Agency for Marine and Water Management

Available from: 2019-08-06 Created: 2019-08-06 Last updated: 2019-08-06

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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  • vancouver
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  • Other style
More styles
Language
  • de-DE
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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