Parameter estimation using randomized phases in an integrated assessment model for Antarctic krill.

ABSTRACT: An integrated model assessing the status and productivity of Antarctic krill (Euphausia superba, hereafter krill) was configured to estimate different subsets of 118 potentially estimable parameters in alternative configurations. We fixed the parameters that were not estimated in any given configuration at pre-specified values. The model was fitted to over forty years of fisheries and survey data for krill in Subarea 48.1, a statistical reporting area around the Antarctic Peninsula used by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR). The number of estimated parameters was gradually increased across model configurations. Configurations that estimated more parameters fitted the data better, but the order in which the parameters were estimated became more

SUBMITTER: Kinzey D 

PROVIDER: S-EPMC6097675 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature