R/SpawnerPerRecruit.R

In nmfs-fish-tools/data_dictionary: Collaborative tool to improve consistency in terminology and develop a framework of tools for fisheries science.

#' Spawner per recruit (SPR)
#'
#' The ratio of the amount of spawning biomass produced by a cohort over its
#' lifespan under a specific fishing regime relative to the spawning biomass
#' produced over the cohort's lifespan under no fishing. The numerator will
#' always be smaller than the denominator because of mortality from fishing.
#' Only information about the life history and fishing is needed for the
#' calculation, whereas other reference points may need information about
#' recruitment, making it a common proxy for reference points based on maximum
#' sustainable yield.
#'
#' @format
#' \describe{
#' \item{Examples}{SPR30% }
#' \item{Rationale}{Spawner per recruit and spawning potential ratio have the
#' same acronym of SPR.}
#' \item{Alternatives}{30%SPR}
#' \item{Range of possible values}{0--1}
#' \item{Units}{}
#' }
SpawnerPerRecruit <- NULL