The scaling parameters convert the effort applied by each gear to each living resource guild in the model, into a harvest ratio (proportion of mass captured per day). Effort is the product of activity and the relative power of each gear with respect to each guild.
R-list object generated by the e2e_read() function which defined the model configuration
In order to estimate these scaling parameters, data are needed for a 'calibration' time period when activity, catch and harvest ratio are all known.
The function assumes that the relevant model configuration has already been loaded using the e2e_read() function. It is expected that this has loaded the array of power parameters (catch per unit activity by gear and guild during the calibration period) given in the file /Param/fishing_power_*.csv, the corresponding activity in the file /Param/fishing_activity_*.csv, and the known harvest ratios of each guild in the file /Target/region_harvest_r_*.csv
The function returns rough estimates of the scaling parameters. These are only rough because they assume that the effort and resource biomass are distributed uniformly over the model domain. Hence they should be used as initial estimates to be refined by optimization.
The scaling parameters are dispayed on the screen and saved in a dataframe. The values then need to be manually edited into rows 12-21 (excluding the header row) of the file /Param/fishing_fleet_*.csv
Dataframe of the effort-harvest ratio scaling parameter values for each guild
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