Equilibrium yield curve over effort — ms_yield

Scales a reference effort vector (days by segment) by mult and runs each scaled vector to equilibrium. The scaled days are the caps (registered days); the days fished are those of the vessels that break even, so the curve ends where effort is limited by profit.

Usage

ms_yield_curve(
  sys,
  E_ref,
  mult = c(0, 10^seq(-1.5, log10(8), length.out = 60)),
  years = 300,
  Bpa = 0.5,
  ...
)

Arguments

sys: an ms_system.
E_ref: reference days by segment (e.g. the status quo).
mult: multipliers of E_ref.
years: years to equilibrium.
Bpa: safeguard relative to Bmsy.
...: passed to ms_simulate() (gamma, open, ...).

Value

A data frame with E (days fished), yield, profit, min_BBmsy

and n_below_Bpa, with attribute BBmsy.