R/WalleyeML.R

#' @title Back-calculated lengths-at-age for Walleye from Lake Mille Lacs, 2000-2011.
#' 
#' @description Back-calculated lengths-at-age for Walleye (\emph{Sander vitreus}) from Lake Mille Lacs. Walleye were captured by Minnesota Department of Natural Resources personnel in fishery-independent gillnets (five multifilament nylon mesh panels with each panel measuring 15.2 m wide and 1.8 m high; bar-measure mesh sizes of the panels were 19.1, 25.4, 31.7, 38.1, and 50.8 mm) set in the fall (mid September to early October) from 2000 to 2011.
#' 
#' @name WalleyeML
#' 
#' @docType data
#' 
#' @format A data frame of 14583 observations on the following 9 variables:
#' \describe{
#'  \item{ID}{A unique fish identification number.} 
#'  \item{Year}{Year of data.} 
#'  \item{Sex}{Sex (female, male).} 
#'  \item{Est.Age}{Estimated (from otoliths) age (yrs) at capture.}
#'  \item{TL}{Total length (mm).}
#'  \item{Scale.Rad}{Total scale radius (mm) at capture.} 
#'  \item{Dist.Ann}{Scale radius (mm) to annulus given in \code{BC.Age}.} 
#'  \item{BC.Age}{Annulus or previous age.} 
#'  \item{BC.Len}{Back-calculated length at \code{BC.Age}. Lengths were back-calculated using the \emph{Scale-Proportional Hypothesis} method.} 
#' }
#' 
#' @section Topic(s):
#'  \itemize{
#'   \item Growth
#'   \item von Bertalanffy
#'   \item Back-calculation
#'  }
#'  
#' @concept Growth
#' @concept von Bertalanffy
#' @concept Back-calculation
#' 
#' @source These unpublished data are from the Minnesota Department of Natural Resources, Section of Fisheries (via Melissa Treml). \bold{Do not use for other than educational purposes without permission from the source.} \href{https://raw.githubusercontent.com/fishR-Core-Team/FSAdata/main/data-raw/WalleyeML.csv}{CSV file}
#' 
#' @keywords datasets
#' 
#' @examples
#' data(WalleyeML)
#' str(WalleyeML)
#' head(WalleyeML)
#' xtabs(~Year+Est.Age+Sex,data=WalleyeML)
#' 
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droglenc/FSAdata documentation built on Aug. 30, 2023, 12:53 a.m.