Shared-q yield curve (the mmsyapp model) — ms_shared_q

The classical multispecies model with one effort and a fixed catchability vector, calibrated so that it reproduces the fishing mortality of a reference state: q_i = F_i / E, with B_i/K_i = 1 - q_i E / r_i at equilibrium. The F cap of the system (F_cap) applies as in ms_simulate(), so no stock falls below 2 - F_cap Bmsy.

Usage

ms_shared_q_curve(
  sys,
  ref,
  mult = 10^seq(-1.5, log10(4), length.out = 60),
  Bpa = 0.5
)

Arguments

sys: an ms_system.
ref: a reference state from ms_open_access() or ms_status_quo() (uses its FFmsy and E_seg).
mult: multipliers of the reference total days.
Bpa: safeguard relative to Bmsy.

Value

A data frame as ms_yield_curve().