LBSPRsim: LBSPR Simulation Model

In LBSPR: Length-Based Spawning Potential Ratio

Description

Function that generates the expected equilbrium size composition given biological parameters, and fishing mortality and selectivity pattern.

Usage

LBSPRsim(LB_pars = NULL, Control = list(), verbose = TRUE)

Arguments

LB_pars	an object of class 'LB_pars' that contains the life history information
Control	a list of control options for the LBSPR model.
verbose	display messages?

Details

The Control options are:

modtype

Model Type: either Growth-Type-Group Model (default: "GTG") or Age-Structured ("absel")

maxsd

Maximum number of standard deviations for length-at-age distribution (default is 2)

ngtg

Number of groups for the GTG model. Default is 13

P

Proportion of survival of initial cohort for maximum age for Age-Structured model. Default is 0.01

Nage

Number of pseudo-age classes in the Age Structured model. Default is 101

maxFM

Maximum value for F/M. Estimated values higher than this are trunctated to maxFM. Default is 4

Value

a object of class 'LB_obj'

Author(s)

A. Hordyk

Examples

 LB_pars <- new("LB_pars")
 LB_pars@MK <- 1.5
 LB_pars@Linf <- 100
 LB_pars@L50 <- 50
 LB_pars@L95 <- 55
 LB_pars@SL50 <- 60
 LB_pars@SL95 <- 65
 LB_pars@FM <- 1
 Sim <- LBSPRsim(LB_pars)
 Sim@SPR

LBSPR documentation built on Oct. 6, 2021, 5:16 p.m.