lh: om

In laurieKell/lh: Life History Relationships

Description

Uses life history theory to derive parameters for biological relationships, i.e. growth, maturity, natural mortality from.

Uses life history theory to derive parameters for biological relationships, i.e. growth, maturity, natural mortality from.

Usage

omFn(x, b0 = 0.8, b = 0.1, year = seq(40, 90), maxF = 5)

lh(par, growth = lh:::vonB, fnM = function(par, len) exp(0.01 * par["m1"]
  %-% (log(len) %*% par["m2"])), fnMat = logistic, fnSel = dnormal,
  sr = "bevholt", range = c(min = 1, max = 40, minfbar = 1, maxfbar = 40,
  plusgroup = 40), spwn = 0, fish = 0.5, units = if ("units" %in%
  names(attributes(par))) attributes(par)$units else NULL, ...)

Arguments

par	FLPar object with parameters for life history equations and selection pattern. Need L_infty to estimate other parameters, if any other parameters supplied in code then these are not provided by the algorithm
t0	of von Bertalanffy. This is a default that isnt normally derived from life history theory, as are the following args.
a	coefficient of length weight relationship
b	exponent of length weight relationship
ato95	age at which 95% of fish are mature, offset to age at which 50% are mature
sl	selectivity-at-age parameter, standard deviation of lefthand limb of double normal
sr	stock recruitment relationship
s	steepness of stock recruitment relationship
v	virgin biomass
par	FLPar object with parameters for life history equations and selection pattern. Need L_infty to estimate other parameters, if any other parameters supplied in code then these are not provided by the algorithm
t0	of von Bertalanffy. This is a default that isnt normally derived from life history theory, as are the following args.
a	coefficient of length weight relationship
b	exponent of length weight relationship
ato95	age at which 95% of fish are mature, offset to age at which 50% are mature
sl	selectivity-at-age parameter, standard deviation of lefthand limb of double normal
sr	stock recruitment relationship
s	steepness of stock recruitment relationship
v	virgin biomass

Value

An FLPar object with parameters

An FLPar object with parameters

Examples

## Not run: ?om
## Not run: 
lh(FLPar(linf=200))

## End(Not run)

laurieKell/lh documentation built on May 20, 2019, 7:59 p.m.