refs

Returns a variety of reference points based on spawner per recruit (S/R) and stock recruitment relationships.

$F_MSY$ corresponds to the level of exploitation that provides the maximum, derived from a spawner and yield curves combined with a stock recruitment relationship, while $F_Crash$ is the level of F that will drive the stock to extinction.

Reference points can also be derived from the spawner and yield curves alone. For example $F_0.1$ is a proxy for $F_MSY$ and is the fishing mortality that corresponds to a point on the yield per recruit curve where the slope is 10% of that at the origin; $F_Max$ is the maximum of the yield per recruit and $SPR_O$ is the spawner per recruit at virgin biomass, and $SPR_30$ corressponds to the point on the curve where SPR is 30% of $SPR_0$. In these cases the biomass, ssb and yield values are derived by multiplying the per recruit values by the average recruitment.

refs(object, ...)

Arguments

object	FLStock
...	other arguments

Value

data.frame

Examples

# NOT RUN {
 library(FLCore)
 library(FLBRP)
 library(ggplotFL)
 library(FLife)
 library(popbio)
 library(plyr)

 data(ple4)

 refs(ple4)
# }