historical_FM: Historical fishing mortality to cause estimated depletion

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

Historical fishing mortality to cause estimated depletion

Description

historical_FM gives the historical fishing mortality that is most likely to have resulted in the currently estimated depletion value for the fished stock.

Usage

historical_FM(
  Species,
  eq_time = 150,
  R0 = 1e+05,
  LDP = 0.1,
  Recruitment_Var = FALSE,
  Recruitment_mode = "pool"
)

Arguments

Species	character value, the species to analyze. Species names are in the format species abbreviation.state or stock.year assessed. Example: BR.OR.2003 is the Oregon black rockfish stock assessed in 2003.
eq_time	numeric value, the number of years to run the function to determine the historic fishing mortality. Default value is 150.
R0	numeric value, set arbitrarily, the unfished recruitment. Default value is 1e+5.
LDP	numeric value, the proportion of larvae that drift to adjacent areas. Default value is 0.1.
Recruitment_Var	logical vector, does recruitment contain a stochastic component? Default value is FALSE.
Recruitment_mode	character value, values can be: 'closed' - the recruits in each area originate from adults in that area. 'pool' - the recruits in each area come from a pool of larvae produced by adults in all areas. 'regional_DD' - larvae experience regional density dependence before settling evenly across all areas 'local_DD' - larvae experience local density dependence before settling evely across all areas Default value is 'pool'.

Value

a numeric value, the historical value of fishing mortality that would result in the estimated depletion value, on the interval (0, 1).

Examples

historical_FM(Species = 'BR_CA_2003', eq_time = 150, R0 = 1e+5, LDP = 0.1,
   Recruitment_Var = FALSE, Recruitment_mode = 'pool')

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