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This MizerParams object is an approximation of the model used by Datta & Blanchard (2016), which allows to reproduce their results and to extend it to the full gonadic mass dynamics implemented in mizerSeasonal.

Usage

datta_params

Format

A MizerParams object

Source

Datta, S. & Blanchard, J. L. "The effects of seasonal processes on size spectrum dynamics". Canadian Journal of Fisheries and Aquatic Sciences (2016). https://cdnsciencepub.com/doi/full/10.1139/cjfas-2015-0468

Details

The paper "The effects of seasonal processes on size spectrum dynamics" by Samik Datta and Julia Blanchard, published in Can. J. Fish. Aquat. Sci. 73, 598–610 (2016), was the first paper to investigate seasonal processes in the context of size spectrum dynamics. The authors used an early version of the mizer code that they then modified. Their code is available at https://figshare.com/s/e75f29d4cc9b94ae393b.

This MizerParams object is based on the parameters used in the paper. However the choice of size bins for the numerical implementation of the mizer equations is different from the one used in the paper. The paper used wider size-bins for the resource spectrum than for the fish spectrum. The modern mizer code no longer supports this. So this MizerParams object uses the same size bins for the resource and fish spectra. Like the model by Datta and Blanchard, we use 100 size bins for the fish spectra but we use 180 size bins for the full spectra instead of 130. The initial state of the MizerParams object is set to the steady state of the model.

The script that created this MizerParams object is available at https://github.com/gustavdelius/mizerSeasonal/blob/main/data-raw/datta_params.R.