Description Usage Arguments Value See Also Examples

Generates an object of class `ypr_population`

.

1 2 3 4 5 | ```
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_update`

, `ypr_schedule`

,
`ypr_yield`

and `ypr_optimize`

.

1 | ```
ypr_population(k = 0.1, Linf = 90)
``` |

poissonconsulting/ypr documentation built on May 16, 2019, 11:12 p.m.

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