Description Usage Arguments Value References
calculates other sources of natural mortality other than predation. It is assumed that M1 mortality follows a beta distribution and that in general the small and large size classses suffer the greatest mortality.
1 2 | calc_M1(nSize, nSpecies, lBound, mBound, alphaM1, betaM1, cM1, scLinfMat,
scLinf, phiMin, parameterValues)
|
nSize |
Number of size class intervals species can grow through |
nSpecies |
Number of species in the model |
lBound |
Lower bound of each size class interval |
mBound |
Mid point of each size class interval |
alphaM1 |
Shape parameter (alpha) of the beta distribution |
betaM1 |
Shape parameter (beta) of the beta distribution |
cM1 |
Scales the pdf ?????? |
scLinf |
The size class at which each species reaches L_inf (maximum length) |
phiMin |
Model timestep (years). See |
parameterValues |
Matrix of species specific parameters. See |
A matrix is returned
M1 |
A matrix (size nSize x nSpecies) of M1 (natural mortality) values. Note: M1 = 0 for size classes in which a species does not reach/grow in to. |
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
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