Calculate species ration, growth efficiency, and size class weight

Source: R/calc_ration.R

Calculates the ration, weight, and growth efficiency for a species in a size class. Ration is defined as the amount consumed to account for growth (growth increment / growth efficiency)

calc_ration(nSize, nSpecies, uBound, lBound, midBound, phiMin,
  parameterValues)

Arguments

nSize

Number of size class intervals species can grow through

nSpecies

Number of species in the model

uBound

Upper bound of each size class interval

lBound

Lower bound of each size class interval

phiMin

Model time step (years). See calc_phi

mBound

Mid point of each size class interval

Value

A list is returned

ration

matrix of size nSize x nSpecies. Amount consumed to account for growth (growth in time interval)/growth efficiency

wgt

matrix of size nSize x nSpecies. Weight of average sized fish in each size class. Uses length weight relationship. See rochet_GB_parameterValues

gEff

matrix of size nSize x nSpecies. Growth Efficiencies

scLinf

The size class at which each species reaches L_inf (maximum length)

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