Fdem {DLMtool}R Documentation

Demographic FMSY method

Description

FMSY is calculated as r/2 where r is calculated from a demographic approach (inc steepness). Coupled with an estimate of current abundance that gives you the OFL.

Usage

Fdem(x, Data, reps = 100, plot = FALSE)

Fdem_CC(x, Data, reps = 100, plot = FALSE, Fmin = 0.005)

Fdem_ML(x, Data, reps = 100, plot = FALSE, Fmin = 0.005)

Arguments

x

A position in the data object

Data

A data object

reps

The number of stochastic samples of the MP recommendation(s)

plot

Logical. Show the plot?

Fmin

The minimum fishing mortality rate derived from the catch-curve analysis

Details

The TAC is calculated as:

\textrm{TAC} = F_{\textrm{MSY}} A

where A is an estimate of current abundance, and F_{\textrm{MSY}} is estimated as r/2, where r is the intrinsic rate of population growth, estimated from the life-history parameters using the methods of McAllister et al. (2001).

Value

An object of class Rec-class with the TAC slot populated with a numeric vector of length reps

Functions

Required Data

See Data-class for information on the Data object

Fdem: Abun, FMSY_M, L50, MaxAge, Mort, steep, vbK, vbLinf, vbt0, wla, wlb

Fdem_CC: CAA, Cat, FMSY_M, L50, MaxAge, Mort, steep, vbK, vbLinf, vbt0, wla, wlb

Fdem_ML: CAL, Cat, FMSY_M, L50, Lbar, Lc, MaxAge, Mort, steep, vbK, vbLinf, vbt0, wla, wlb

Rendered Equations

See Online Documentation for correctly rendered equations

Author(s)

T. Carruthers

References

McAllister, M.K., Pikitch, E.K., and Babcock, E.A. 2001. Using demographic methods to construct Bayesian priors for the intrinsic rate of increase in the Schaefer model and implications for stock rebuilding. Can. J. Fish. Aquat. Sci. 58: 1871-1890.

Examples

Fdem(1, MSEtool::SimulatedData, plot=TRUE)
Fdem_CC(1, MSEtool::SimulatedData, plot=TRUE)
Fdem_ML(1, MSEtool::SimulatedData, plot=TRUE)

[Package DLMtool version 6.0.2 Index]