getYieldVsF: Calculate a yield-vs-F curve

In sizespectrum/mizerExperimental: Extends the mizer package with experimental features

Calculate a yield-vs-F curve

Description

Calculates the yield of a species for a range of fishing mortalities for that species while the fishing mortalities for the other species are held fixed.

Usage

getYieldVsF(
  params,
  species,
  F_range,
  F_max = 1,
  F_min = 0,
  no_steps = 10,
  distance_func = distanceSSLogN,
  tol = 0.001,
  t_max = 100
)

Arguments

params	An object of class MizerParams.
species	Name of the target species
F_range	A sequence of fishing mortalities at which to evaluate the yield. If missing, it is set to seq(from = 0, to = F_max, length.out = no_steps).
F_max	The maximum fishing mortality. Used only if F_range is missing.
F_min	The minimum fishing mortality. Used only if F_range is missing.
no_steps	The number of steps to use. Only used if F_range is missing.
distance_func	A function that will be called after every t_per years with both the previous and the new state and that should return a number that in some sense measures the distance between the states. By default this uses the function distanceSSLogN() that you can use as a model for your own distance function.
tol	The projectToSteady function stops when the relative change in the egg production RDI over t_per years is less than tol for every species.
t_max	The longest time to run project to find steady state.

Value

A data frame with columns F and yield.

See Also

plotYieldVsF

Examples

## Not run: 
params <- newMultispeciesParams(NS_species_params_gears, inter)
y <- getYieldVsF(params, "Cod", F_max = 1, no_steps = 5)

## End(Not run)

sizespectrum/mizerExperimental documentation built on Oct. 20, 2024, 4:09 a.m.