#' @title Biological data for Black Drum from Virginia waters of the Atlantic Ocean, 2001.
#'
#' @description Biological data (lengths, weights, ages (from otoliths), and sex) for Black Drum (\emph{Pogonias cromis}) from Virginia waters of the Atlantic Ocean, 2001.
#'
#' @name BlackDrum2001
#'
#' @docType data
#'
#' @format A data frame with 141 observations on the following 9 variables.
#' \describe{
#' \item{year}{Year of capture (all 2001)}
#' \item{agid}{Unique identification number}
#' \item{spname}{Species name (all \dQuote{Black Drum})}
#' \item{month}{Month of capture}
#' \item{day}{Day of capture}
#' \item{weight}{Weight (lbs) -- most are missing}
#' \item{tl}{Total length (mm)}
#' \item{sex}{Sex (\code{female}, \code{male}, and \code{unknown})}
#' \item{otoage}{Age (yrs; from otoliths)}
#' }
#'
#' @section Topic(s):
#' \itemize{
#' \item Growth
#' \item von Bertalanffy
#' \item Weight-Length
#' }
#'
#' @concept Growth
#' @concept von Bertalanffy
#' @concept Weight-Length
#'
#' @note Used in the \href{https://derekogle.com/IFAR/}{Introductory Fisheries Analyses with R} book.
#'
#' @source Obtained directly from the Virginia Marine Resources Commission via Hank Liao. \href{https://raw.githubusercontent.com/fishR-Core-Team/FSAdata/main/data-raw/BlackDrum2001.csv}{CSV file}
#'
#' @keywords datasets
#'
#' @examples
#' data(BlackDrum2001)
#' str(BlackDrum2001)
#' head(BlackDrum2001)
#' plot(tl~otoage,data=BlackDrum2001)
#'
NULL
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