build.PandF: Construct time varying fecundity rates and birth ogives

In NorskRegnesentral/rSPAMM: Population dynamics model for harp and hooded seals

Description

Prepare the fecundity vector and the birth ogive matrix used by the model. A linear transition between years with missing data is used.

Usage

build.PandF(
  Fdat = fecundity,
  Fproj = Fproj,
  Pdat = Pdat,
  Pper = Pper,
  years = years,
  return.periods = T
)

Arguments

Fdat	Observed fecundity rates.
Fproj	Which fecundity rate used in projections. Default is mean value over all observed fecundity rates ("mean"). If not a specified fecundity rate can be used (just insert number).
Pdat	Observed birth ogives.
Pper	For which time periods the birth ogives are valid.
years	Start and stop year for the model (without projections).
return.periods	Whether to return data frame containing information about time periods of P and F sampling. NOTE! This is to allow plotting fecundity curves, distinguishing between real sampled values and interpolated between sampling periods. The returned object, Pper, must be omitted from data that are input into model.

Value

Pmatrix Time varying birth ogives.

Examples

FvecandPmat <- build.PandF(fecundity,catch_data,Fproj,Pdat,Pper)

NorskRegnesentral/rSPAMM documentation built on Nov. 16, 2020, 10:58 p.m.