DLMtool (version 3.2)

CSRAfunc: Optimization function for CSRA

Description

What depletion level and corresponding equlibrium 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 vulnerabilty 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?