SRAsim: Simulates catch at age and catch history data for testing SRA...

In DLMtool/DLMtool: Data-Limited Methods Toolkit

Description

Catch at age and catch simulator.

Usage

SRAsim(
  OM,
  qmult = 0.5,
  CAApatchy = 0.4,
  Cpatchy = 1,
  Ipatchy = 0.4,
  MLpatchy = 0.4,
  nCAA = 100,
  nL = 200,
  sigmaE = 0.25,
  sigmaI = 0.1
)

Arguments

OM	An operating model object with M, growth, stock-recruitment and maturity parameters specified.
qmult	Fraction of natural mortality rate that is mean fishing mortality (Fishing catchability multiplier)
CAApatchy	The fraction of years that have catch at age data
Cpatchy	The fraction of years that have catch data
Ipatchy	The fraction of years that have index data
MLpatchy	The fraction of years that have mean length data
nCAA	The number of independent annual catch at age observations (same among all years)
nL	The number of independent annual catch at length observations (same among all years) for calculating mean length
sigmaE	Level of simulated interannual variability in effort (F) expressed as a lognormal SD
sigmaI	Observation error in relative abundance indices expressed as a lognormal SD

Value

A list: Chist = historical catch series,Recdevs = historical recruitment deviations (mean = 1), CAA = catch at age matrix, N = numbers at age matrix, SSB = annual spawning biomass, FM = Fishing mortality rate at age matrix, M = natural mortality rate classy

Author(s)

T. Carruthers (Canadian DFO grant)

Examples

out<-SRAsim(testOM)

DLMtool/DLMtool documentation built on June 20, 2021, 5:20 p.m.