Compute average SSB under a given level of
fishing mortality.
Usage
compute_bx(nages, mort, mat, waa, sel, ret, F, avg_rec)
Arguments
- nages
number of ages in age structure
- mort
instantaneous natural mortality rate
- mat
maturity-at-age vector
- waa
weight-at-age vector
- sel
total selectivity-at-age vector
- ret
total retention-at-age vector
- F
instantenous fishing mortality rate
- avg_rec
average recruitment