calc_M2_c: Calculates predation mortality, M2 (C++)

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

Description

Calculates the predation mortality for each species in each size class

Usage

calc_M2_c(nSize, nSpecies, N, scLinf, ration, wgt, suitability, phiMin,
  otherFood)

Arguments

nSize	Number of size class intervals species can grow through
nSpecies	Number of species in the model
N	A matrix (nSize x nSpecies) of abundance (number of individuals)
scLinf	A vector (nSpecies) of the size class at which each species reaches L_inf (maximum length)
ration	A matrix (nSize x nSpecies) of (growth in time interval)/growth efficiency values. See calc_ration
wgt	A matrix (nSize x nSpecies) of species weight at the mid point of each size class (Units: grams). See calc_ration
suitability	3D array of predator size preference for prey size. See calc_sizepref_suitability
phiMin	Scalar. Model timestep (years). See calc_phi
otherFood	Scalar. Amount of other food available not accounted for in the model (g)

Value

A matrix is returned

M2	A matrix (nSize x nSpecies) of M2 (predation mortality) values. Note: M2 = 0 for size classes in which a species is not preyed upon.

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 alc_

See Also

calc_sizepref_suitability, calc_ration calc_phi

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