CSRAfunc: Optimization function for CSRA

In MSEtool: Management Strategy Evaluation Toolkit

Optimization function for CSRA

Description

What depletion level and corresponding equilibrium F arise from data regarding mean length of current catches, natural mortality rate, steepness of the stock recruitment curve, maximum length, maximum growth rate, age at maturity, age based vulnerability, maturity at age, maximum age and number of historical years of fishing.

Usage

CSRAfunc(
  lnF,
  Mc,
  hc,
  maxage,
  nyears,
  AFSc,
  AFCc,
  Linfc,
  Kc,
  t0c,
  AMc,
  ac,
  bc,
  vulnc,
  matc,
  MLc,
  CAL,
  CAA,
  opt = T,
  meth = "ML"
)

Arguments

lnF	A proposed value of current instantaneous fishing mortality rate
Mc	Natural mortality rate estimates
hc	Steepness (Beverton-Holt stock recruitment)
maxage	Maximum age
nyears	Number of historical years of fishing
AFSc	Age at full selection
AFCc	Age at first capture
Linfc	Maximum length (von Bertalanffy growth)
Kc	Maximum growth rate (von Bertalanffy growth)
t0c	Theoretical age at length zero (von Bertalanffy growth)
AMc	Age at maturity
ac	Length-weight conversion parameter a (W=aL^b)
bc	Length-weight conversion parameter b (W=aL^b)
vulnc	A vector (nage long) of the vulnerability at age (max 1) to fishing.
matc	A vector (nage long) of the maturity at age (max 1)
MLc	A current mean length estimates
CAL	A catch-at-length matrix nyears x (1 Linf unit) length bins
CAA	A catch-at-age matrix nyears x maximum age
opt	Should the measure of fit be returned?
meth	Are we fitting to mean length or catch composition?

Author(s)

T. Carruthers

MSEtool documentation built on July 26, 2023, 5:21 p.m.