lbsprWrapper: Estimation of SPR using LBSPR method (Hordyk et al. 2016)

In natureanalytics-ca/fishLengthAssess: Length-based Evaluation of Fish Stock and Fishery

Estimation of SPR using LBSPR method (Hordyk et al. 2016)

Description

Hordyk, A.R., Ono, K., Prince, J.D., Walters, C.J., 2016. A simple length-structured model based on life history ratios and incorporating size-dependent selectivity: application to spawning potential ratios for data-poor stocks. Can. J. Fish. Aquat. Sci. 73, 1787–1799. https://doi.org/10.1139/cjfas-2015-0422

Usage

lbsprWrapper(
  LifeHistoryObj,
  LengthCompObj,
  Lc = 0,
  binWidth = 1,
  cvLinf = 0.1,
  byGroup = FALSE,
  modtype = "GTG"
)

Arguments

LifeHistoryObj	A LifeHistory object from fishSimGTG.
LengthCompObj	A LengthComp object
Lc	A minimum size limit in the same units of measure (L_units) and type of measurement (L_type) as the corresponding LengthComp object. Only used for analysis of fishery-independent length composition data.
binWidth	Used to create length-frequencies when LengthComp dataType is raw lengths.
cvLinf	Variability in Linf, used in LBSPR fitting. Default value same as that used in LBSPR library
byGroup	A logical indicating whether quantity is to be calculated separately for each of multiple length comp groups (TRUE) or to length comp is to be pooled across groups prior to calculating quantity (default = FALSE). When TRUE, pooling is ignored if only a single group exists.
modtype	From function LBSPR::LBSPRfit, either Growth-Type-Group Model (default: "GTG") or Age-Structured ("absel")

Examples

library(fishSimGTG)
library(LBSPR)
lbsprWrapper(fishSimGTG::LifeHistoryExample, fishLengthAssess::LengthCompExampleFreq)

natureanalytics-ca/fishLengthAssess documentation built on Feb. 28, 2025, 5:46 a.m.