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How much evidence is required for acceptance of productivity regime shifts in fish stock assessments: Are we letting managers off the hook?

Citation

Klaer, NL and O'Boyle, RN and Deroba, JJ and Wayte, SE and Little, LR and Alade, LA and Rago, PJ, How much evidence is required for acceptance of productivity regime shifts in fish stock assessments: Are we letting managers off the hook?, Fisheries Research, 168 pp. 49-55. ISSN 0165-7836 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 Crown Copyright

DOI: doi:10.1016/j.fishres.2015.03.021

Abstract

A difficult question often confronting fisheries assessment scientists and managers is whether or not to accept that a shift in stock productivity has occurred. This is particularly the case when a stock has remained at historically low biomass despite management intervention and when there is an expectation that there should have been a stock recovery. We outline a weight-of-evidence approach that provides a structured means to evaluate this question. The approach, which scores a range of attributes, was applied to five fisheries from the NW Atlantic and SE Australia, chosen to provide a range of supporting evidence, as well as different potential causal mechanisms for a productivity shift. Given the resulting scores for the example stocks, and whether a productivity shift has been accepted for those stocks, a score of between 7 and 12 indicated a level required for acceptance of a productivity shift. The approach has highlighted areas of future research that would improve individual species scores. It is hoped that the paper will encourage a more systematic examination of potential stock productivity shifts in assessments than has hereto been the case.

Item Details

Item Type:Refereed Article
Keywords:fisheries, productivity shift, regime shift
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fisheries Management
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:Little, LR (Dr Richard Little)
ID Code:118802
Year Published:2015
Web of Science® Times Cited:5
Deposited By:Zoology
Deposited On:2017-07-20
Last Modified:2017-09-04
Downloads:0

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