#' @title Ages, lengths, and sexes of Atlantic Croaker by sex.
#'
#' @description Assigned ages (by otoliths), total lengths, and sexes of Atlantic Croaker (\emph{Micropogonias undulatus}).
#'
#' @name Croaker2
#'
#' @docType data
#'
#' @format A data frame of 318 observations on the following 3 variables:
#' \describe{
#' \item{age}{Otolith age-at-capture (years).}
#' \item{tl}{Total length (nearest mm) at capture.}
#' \item{sex}{Sex of the fish (\code{M}=male and \code{F}=female).}
#' }
#'
#' @section Topic(s):
#' \itemize{
#' \item Growth
#' \item von Bertalanffy
#' }
#'
#' @concept Growth
#' @concept von Bertalanffy
#'
#' @source From Figure 4 in Chapter 1 (Atlantic Croaker) of the VMRC Final Report on Finfish Ageing, 1999 by the Center for Quantitative Fisheries Ecology at Old Dominion University. \href{https://raw.githubusercontent.com/fishR-Core-Team/FSAdata/main/data-raw/Croaker2.csv}{CSV file}
#'
#' @keywords datasets
#'
#' @examples
#' data(Croaker2)
#' str(Croaker2)
#' head(Croaker2)
#' op <- par(mfrow=c(1,2),pch=19)
#' plot(tl~age,data=Croaker2,subset=sex=="F",main="Female")
#' plot(tl~age,data=Croaker2,subset=sex=="M",main="Male")
#' par(op)
#'
NULL
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