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Overview

This guide describes how Gmacs can be used to develop size-based stock assessment models. The Gmacs modeling framework makes use of a wide variety of sex-specific fishery data, including survey and fishery indices of abundance and fishery and survey size-composition data. Data must be entered in the form of a text file, model.dat. Control of the model is achieved through the use of three separate input files: the starter.gm file, model.ctl file, and forecast.gm file. Examples of data and control files are presented at the end of this guide.

TODO

• Write introduction to Gmacs.
• Describe the quick start download procedure.
• Describe the basic set up of files, the executable program, and how to build from source.
• Describe the basic structure of the gmacs.tpl file and how to edit code and contribute to the project.
• Write user guide for each section of the model: starter.gm, data.gm, control.gm and forecast.gm.
• Explain use of the model and associate tools (with clean, run, get files etc.)
• Describe interpretation of outputs, including how to download, install, and use the R package.