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Ecologically Sustainable Exploitation Rates - a multispecies approach for fisheries management

Säterberg, Torbjörn and Säterberg, Torbjörn and Casini, Michele and Gårdmark, Anna (2019). Ecologically Sustainable Exploitation Rates - a multispecies approach for fisheries management. Fish and Fisheries. 20 :5 , 952-961
[Journal article]

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Abstract

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.

Authors/Creators:Säterberg, Torbjörn and Säterberg, Torbjörn and Casini, Michele and Gårdmark, Anna
Title:Ecologically Sustainable Exploitation Rates - a multispecies approach for fisheries management
Year of publishing :2019
Volume:20
Number:5
Page range:952-961
Number of Pages:10
Publisher:Wiley
ISSN:1467-2960
Language:English
Publication Type:Journal article
Refereed:No
Article category:Scientific peer reviewed
Version:Submitted version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 101 Mathematics > 10106 Probability Theory and Statistics
Keywords:multispecies exploitation, multispecies objective, reference points, statistical modelling, stock assessment, viability modelling
URN:NBN:urn:nbn:se:slu:epsilon-p-100747
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-100747
Additional ID:
Type of IDID
DOI10.1111/faf.12390
Web of Science (WoS)000476053300001
ID Code:16364
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:11 Oct 2019 06:39
Metadata Last Modified:11 Oct 2019 06:57

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