plotcdfa.f: The proportion of a cohort of at or above difference sizes...

In duplisea/vbrecruit: Calculate proportion of a cohort recruit each year based on VB growth

Description

Using a Von Bertalanffy growth function and parameters you supply, this determines the proportion of a cohort's numbers and biomass that are at or above different size classes each year and plots them. A helper function not usually called directly. It is called by the overall vbrecruit function.

Usage

plotcdfa.f(
  proj.object,
  lengths.of.interest,
  birth.year,
  final.year,
  k,
  Linf,
  t0,
  cv
)

Arguments

proj.object	a projection object produced by vbgrowth.f
lengths.of.interest	(often the length at recruitment to the fishery or a valuable size
birth.year	four digit year of birth
final.year	four digit final year of the growth projection (birth year + average max age is a good)
k	VB k
Linf	VB maximum length (cm)
t0	VB t-zero
cv	coefficient of variation on length for an age

Examples

vbrecruit.f(birth.year=2011, final.year = 2050, Linf = 42, k = 0.086, t0 = -1.57, cv = 0.089,
   lengths.of.interest=c(22,25,27,30))
cohort.props.f(birth.year=2011, final.year = 2030, Linf = 42, k = 0.086, t0 = -1.57, cv = 0.089)
vb.growth.f(age.vector=1:40,Linf=42,k=0.086,t0=-1.57,cv=0.089)

duplisea/vbrecruit documentation built on Oct. 21, 2020, 6:10 p.m.