Fills in any missing values for f0 so that if the prey abundance was
described by the power law \(\kappa w^{-\lambda}\) then the encounter rate
coming from the given gamma parameter would lead to the feeding level
\(f_0\). This is thus doing the inverse of get_gamma_default().
Only for internal use.
Details
For species for which no value for gamma is specified in the species
parameter data frame, the f0 values is kept as provided in the species
parameter data frame or it is set to 0.6 if it is not provided.
See also
Other functions calculating defaults:
get_gamma_default(),
get_h_default(),
get_ks_default()