Model uncertainty in the ecosystem approach to fisheries

Hill, Simeon L., Watters, George M., Punt, André E., McAllister, Murdoch K., Le Quere, Corinne L. and Turner, John (2007) Model uncertainty in the ecosystem approach to fisheries. Fish and Fisheries, 8 (4). pp. 315-336. ISSN 1467-2979

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Abstract

Fisheries scientists habitually consider uncertainty in parameter values, but often neglect uncertainty about model structure, an issue of increasing importance as ecosystem models are devised to support the move to an ecosystem approach to fisheries (EAF). This paper sets out pragmatic approaches with which to account for uncertainties in model structure and we review current ways of dealing with this issue in fisheries and other disciplines. All involve considering a set of alternative models representing different structural assumptions, but differ in how those models are used. The models can be asked to identify bounds on possible outcomes, find management actions that will perform adequately irrespective of the true model, find management actions that best achieve one or more objectives given weights assigned to each model, or formalize hypotheses for evaluation through experimentation. Data availability is likely to limit the use of approaches that involve weighting alternative models in an ecosystem setting, and the cost of experimentation is likely to limit its use. Practical implementation of an EAF should therefore be based on management approaches that acknowledge the uncertainty inherent in model predictions and are robust to it. Model results must be presented in ways that represent the risks and trade-offs associated with alternative actions and the degree of uncertainty in predictions. This presentation should not disguise the fact that, in many cases, estimates of model uncertainty may be based on subjective criteria. The problem of model uncertainty is far from unique to fisheries, and a dialogue among fisheries modellers and modellers from other scientific communities will therefore be helpful.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
Faculty of Science > Tyndall Centre for Climatic Change
Depositing User: Rosie Cullington
Date Deposited: 27 Feb 2011 09:07
Last Modified: 25 Jul 2019 08:56
URI: https://ueaeprints.uea.ac.uk/id/eprint/24996
DOI: 10.1111/j.1467-2979.2007.00257.x

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