effort_allocation: Effort allocation

In vquennessen/densityratio: Using Density Ratios to Help Manage Fisheries In And Around Marine Reserves

Effort allocation

Description

effort_allocation redistributes fishing effort for the next timestep.

Usage

effort_allocation(
  t,
  cr,
  fdr,
  Allocation = "IFD",
  E,
  Yield,
  Time1 = 50,
  Inside = 3,
  Outside = c(1, 2, 4, 5)
)

Arguments

t	temporary numeric value, the current time step.
cr	temporary numeric value, the current control rule.
fdr	temporary numeric value, the current final target density ratio.
Allocation	character value, how effort is to be allocated. Values can be: 'IFD' - the ideal free distribution. Effort is allocated proportional to the yield caught in each area in the previous timestep. 'equal' - Effort is allocated equally between all areas. Default value is 'IFD'.
E	numeric array, the relative fishing effort displayed in each area, at each time step, under each control rule, and for each natural mortality estimate.
Yield	numeric array, the yield caught in each area, at each timestep, under each control rule, and for each estimate of natural mortality, in kg.
Time1	numeric value, the number of years to run the model before a marine reserve is implemented. Default value is 50.
Inside	numeric vector, the area(s) inside the marine reserve. Default value is c(3).
Outside	numeric vector, the area(s) outside the marine reserve. Default value is c(1, 2, 4, 5).

Value

a numeric array updated with the fishing effort allocation for the next timestep.

Examples

A = 5; TimeT = 70; CR = 6; FDR = 4
E <- array(rep(0.2, A*TimeT*CR*FDR), c(A, TimeT, CR, FDR))
Yield <- array(rep(2458, A*TimeT*CR*FDR), c(A, TimeT, CR, FDR))
effort_allocation(t = 51, cr = 1, fdr = 1, Allocation = 'IFD', E,
   Yield, Time1 = 50, Inside = 3, Outside = c(1, 2, 4, 5))

vquennessen/densityratio documentation built on Aug. 28, 2022, 5:36 p.m.