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A comparison of VPA, ASAP and Empirical Approach applications to Eastern Georges Bank Cod (Gadus morhua)
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2016
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By Wang, Y.
[PDF-332.84 KB]
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Description:The 2016 catch advice from the VPA “M 0.8” model provided at the 2015 TRAC assessment meeting differed significantly from the advice provided by the ASAP models (used as a consequence analysis for EGB cod by the TRAC and to assess cod for the entire Georges Bank by the USA). At the 2015 September meeting, the Transboundary Management Guidance Committee (TMGC) expressed concern about significant management impacts for both countries from the divergent catch advice and the potential risk that this posed for cooperative management. There was a request from the USA members to resolve the conflict between the international process and domestic process. The Terms of Reference for the 2016 TRAC cod assessment requested updating the 2013 benchmark VPA and ASAP models, the consequence analysis table, developing and applying an empirical approach and reporting on any factors and risks that should be considered in interpreting the catch advice provided. This working paper characterizes the uncertainties of this stock assessment, with the aim to promote a better understanding of the three approaches: VPA “M 0.8” model, ASAP “M 0.2” model and an empirical approach, and to facilitate discussion on the 2017 catch advice.
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Rights Information:Public Domain
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Compliance:Submitted
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