CPUE is assumed proportional to vulnerable biomass, \(C/E = qB\). Fits
\(\log I = \log q + \beta \log B\) (\(\beta = 1\): proportional;
\(< 1\): hyperstable; \(> 1\): hyperdepletion) and the trend in
\(\log(I/B^\beta)\) over years (catchability drift, e.g. effort creep).
Needs the answer key (index_true), so it works on a floss_data.
Arguments
- data
a
floss_dataor aread_dataset()list.- species
species name.
- source
fleet.
- iter
iteration(s) (pooled).