#' @title Ages (subsample) and lengths (all fish) for male and female Siscowet Lake Trout captured at four locations in Michigan waters of Lake Superior.
#'
#' @description Ages (subsample) and lengths (all fish) for male and female Siscowet Lake Trout captured at four locations in Michigan waters of Lake Superior.
#'
#' @name SiscowetMI2004
#'
#' @docType data
#'
#' @format A data frame with 780 observations on the following 8 variables.
#' \describe{
#' \item{locID}{Locations (\code{Blind Sucker},\code{Deer Park},\code{Grand Marais},\code{Little Lake Harbor})}
#' \item{pnldep}{Depth of gillnet panel in which the fish was captured}
#' \item{mesh}{Gillnet stretch mesh measure}
#' \item{fishID}{Unique fish identification code}
#' \item{sex}{Sex (\code{F} and \code{M})}
#' \item{age}{Assigned ages (yrs; from otoliths)}
#' \item{len}{Total length (mm)}
#' \item{wgt}{Weight (g)}
#' }
#'
#' @section Topic(s):
#' \itemize{
#' \item Age-Length Key
#' \item Growth
#' }
#'
#' @concept Age-Length Key
#' @concept Growth
#'
#' @note Used in the \href{https://derekogle.com/IFAR/}{Introductory Fisheries Analyses with R} book.
#'
#' @source Obtained directly from the U.S. Fish and Wildlife Service via Michael Seider. \href{https://raw.githubusercontent.com/fishR-Core-Team/FSAdata/main/data-raw/SiscowetMI2004.csv}{CSV file}
#'
#' @keywords datasets
#'
#' @examples
#' data(SiscowetMI2004)
#' str(SiscowetMI2004)
#' head(SiscowetMI2004)
#' xtabs(~age+locID,data=SiscowetMI2004)
#' op <- par(mfrow=c(2,2),pch=19)
#' plot(len~age,data=SiscowetMI2004,subset=locID=="Blind Sucker",main="Blind Sucker")
#' plot(len~age,data=SiscowetMI2004,subset=locID=="Grand Marais",main="Grand Marais")
#' plot(len~age,data=SiscowetMI2004,subset=locID=="Little Lake Harbor",main="Little Lake Harbor")
#' par(op)
#'
NULL
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