calc_F: Calculate fishing Mortality

In NOAA-EDAB/LeMANS: length-based multispecies analysis by numerical simulation (LeMANS)

Description

Calculates the fishing mortality for each species in each size class using a logistic selectivity curve.

Usage

calc_F(nSize, nSpecies, mBound, lBound, Ffull, Falpha, FL50, scLinf,
  scLinfMat, phiMin, parameterValues)

Arguments

nSize	Number of size class intervals species can grow through
nSpecies	Number of species in the model
mBound	Vector. Mid point of each size class interval
lBound	Vector. Lower bound of each size class interval
Ffull	Scalar. Fishing mortaliy rate for a fully recruited fish
Falpha	Scalar. Number of years to simulate.
FL50	Scalar. The length at which 50 % selection by the fishery occurs.
scLinf	Vector. The size class at which each species reaches L_inf (maximum length)
scLinfMat	Binary matrix indicating which size classes each species occupies
phiMin	Scalar. Model time step (years). See calc_phi
parameterValues	Matrix (nSize x nSpecies). See rochet_GB_parameterValues

Value

A matrix is returned

F	A matrix (size nSize x nSpecies) of F (fishing mortality) values. Note: F = 0 for size classes in which species do not grow (based on von Bertalanfy growth curve)

References

Hall et al. (2006). A length-based multispecies model for evaluating community responses to fishing. Can. J. Fish. Aquat. Sci. 63:1344-1359.

Rochet et al. (2011). Does selective fishing conserve community biodiversity? Prediction from a length-based multispecies model. Can. J. Fish. Aquat. Sci. 68:469-486

NOAA-EDAB/LeMANS documentation built on Feb. 7, 2021, 11:01 p.m.