Stock-Recruitment Parameters

Returns a single rowed data frame of the SR parameters:

alpha

Survival from egg to age tR at low density

beta

Density-dependence

Rk

Lifetime spawners per spawner at low density

phi

Lifetime eggs deposited per recruit at unfished equilibrium

phiF

Lifetime eggs deposited per recruit at the fished equilibrium

R0

Age tR recruits at the unfished equilibrium

R0F

Age tR recruits at the fished equilibrium

S0

Spawners at the unfished equilibrium

S0F

Spawners at the fished equilibrium

ypr_sr(object)

Arguments

object

The population or populations.

Value

A data frame of the SR parameters.

See also

Other sr: ypr_plot_sr(), ypr_tabulate_sr()

Examples

ypr_sr(ypr_population()) # Beverton-Holt
#> # A tibble: 1 × 9
#>      alpha     beta    Rk   phi  phiF    R0   R0F    S0   S0F
#>      <dbl>    <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 0.000838 0.000838     3 3579. 1465. 0.667 0.186  1.33 0.211
ypr_sr(ypr_population(BH = 0L)) # Ricker
#> # A tibble: 1 × 9
#>      alpha     beta    Rk   phi  phiF    R0   R0F    S0   S0F
#>      <dbl>    <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 0.000838 0.000308     3 3579. 1465. 0.995 0.455  1.98 0.517