Generates an object of class `ypr_population`

.

ypr_population(tmax = 20L, k = 0.15, Linf = 100, t0 = 0, Wb = 3, Ls = Linf/2, Sp = 100, es = 1, Sm = 0, fb = 1, tR = 1L, BH = 1L, Rk = 3, M = 0.2, Mb = 0, Lv = Linf/2, Vp = 100, Llo = 0, Lup = Linf, Nc = 0, pi = 0.2, rho = 0, Hm = 0, Rmax = 1, A0 = 0, Wa = 0.01, fa = 1, q = 0.1)

tmax | The maximum age (yr). |
---|---|

k | The VB growth coefficient (per yr). |

Linf | The VB mean maximum length (cm). |

t0 | The (theoretical) age at zero length (yr). |

Wb | The weight (as a function of length) scaling exponent. |

Ls | The length at which 50% mature (cm). |

Sp | The maturity (as a function of length) power. |

es | The annual probability of a mature fish spawning. |

Sm | The spawning mortality probability. |

fb | The fecundity (as a function of weight) scaling exponent. |

tR | The age from which survival is density-independent (yr). |

BH | Recruitment follows a Beverton-Holt (1) or Ricker (0) relationship. |

Rk | The lifetime spawners per spawner at low density. |

M | The instantaneous mortality rate (per yr). |

Mb | The instantaneous mortality rate (as a function of length) scaling exponent. |

Lv | The length at which 50% vulnerable to harvest (cm). |

Vp | The vulnerability to harvest (as a function of length) power. |

Llo | The lower harvest slot length (cm). |

Lup | The upper harvest slot length (cm). |

Nc | The slot limits non-compliance probability. |

pi | The annual capture probability. |

rho | The release probability. |

Hm | The hooking mortality probability. |

Rmax | The number of recruits at the carrying capacity (ind). |

A0 | The initial post age tR density independent mortality probability. |

Wa | The (extrapolated) weight of a 1 cm individual (g). |

fa | The (theoretical) fecundity of a 1 g female (eggs). |

q | The catchability (annual probability of capture) for a unit of effort. |

An object of class `ypr_population`

.

ypr_population(k = 0.1, Linf = 90)#> tmax: 20 #> k: 0.1 #> Linf: 90 #> t0: 0 #> Wb: 3 #> Ls: 45 #> Sp: 100 #> es: 1 #> Sm: 0 #> fb: 1 #> tR: 1 #> BH: 1 #> Rk: 3 #> M: 0.2 #> Mb: 0 #> Lv: 45 #> Vp: 100 #> Llo: 0 #> Lup: 90 #> Nc: 0 #> pi: 0.2 #> rho: 0 #> Hm: 0 #> Rmax: 1 #> A0: 0 #> Wa: 0.01 #> fa: 1 #> q: 0.1