Grym assessment for Subarea 48.1 Euphausia superba populations

WG-SAM-2021 and WG-EMM-2021 reviewed available information for krill assessment simulations in Subarea 48.1 using the Grym. Whilst no agreement on parameters was achieved at WG-SAM-2021, the Working Group agreed that an ensemble approach using multiple parameter value combinations could be used (WG-...

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Bibliographic Details
Main Authors: Maschette, D, Wotherspoon, S, Kawaguchi, S, Ziegler, P
Format: Conference Object
Language:English
Published: CCAMLR 2021
Subjects:
Agricultural
Veterinary and Food Sciences
Fisheries sciences
Fisheries management
Paras
Euphausia superba
Online Access:https://meetings.ccamlr.org/en/wg-fsa-2021/39
http://ecite.utas.edu.au/155007
Description
Summary:WG-SAM-2021 and WG-EMM-2021 reviewed available information for krill assessment simulations in Subarea 48.1 using the Grym. Whilst no agreement on parameters was achieved at WG-SAM-2021, the Working Group agreed that an ensemble approach using multiple parameter value combinations could be used (WG-SAM-2021, paras 3.21-3.22.) WG-EMM-2021 provided initial parameters for the assessment simulations noting that alternate parameters could be tested to compare (WG-EMM-2021, paras 2.32-2.33 and Table 1). Here we present the results of model ensembles for values either provided directly to the CCAMLR e-group on GYM/Grym assessment model development, or calculated based upon data submitted to the e-group. Code and outputs of the models are available on github ( https://github.com/ccamlr/Grym_Base_Case /tree/Simulations ).

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