This data set is based on species in the North Sea (Blanchard et al.). It is
a data.frame that contains all the necessary information to be used by the
MizerParams() constructor. As there is no gear column, each species is
assumed to be fished by a separate gear.
Format
A data frame with 12 rows and 7 columns. Each row is a species.
- species
Name of the species
- w_max
Computational upper size boundary, defaulting to
1.5 * w_inf.- w_mat
Size at maturity
- beta
Size preference ratio
- sigma
Width of the size-preference
- R_max
Maximum reproduction rate
- k_vb
The von Bertalanffy k parameter
- w_inf
The von Bertalanffy asymptotic size. This is the required maximum-size parameter.
Examples
params <- newMultispeciesParams(NS_species_params)
#> ℹ No `a` column so using a = 0.01 in w = a l^b, with w in g and l in cm.
#> ℹ No `b` column so using the isometric default b = 3 in w = a l^b.
#> ℹ No h provided for some species, so using age at maturity to calculate it.
#> ℹ Because you have n != p, the default value for `h` is not very good.
#> ℹ Because the age at maturity is not known, I need to fall back to using
#> von Bertalanffy parameters, where available.
#> ℹ Using z0 = z0pre * w_inf ^ z0exp for calculated z0 values.
#> ℹ Using f0, h, lambda, kappa and the predation kernel to calculate gamma.