R/PikeWindermere.R

In droglenc/FSAdata: Data to Support Fish Stock Assessment ('FSA') Package

#' @title Stock and recruitment data for Northern Pike from Lake Windermere, 1944-1981.
#' 
#' @description Stock and recruitment data for Northern Pike (\emph{Esox lucius}) from Lake Windermere, 1944-1981.
#' 
#' @name PikeWindermere
#' 
#' @docType data
#' 
#' @format A data frame of 75 observations on the following two variables:
#'  \describe{
#'    \item{year}{Year}
#'    \item{stock}{Female biomass (kg)}
#'    \item{recruits}{Number at age-2}
#'    \item{basin}{Basin of Windermere (North or South)}
#'    \item{tdd14}{Temperature degree-days over 14C}
#'  }
#'  
#' @note Stock values were originally reported in 1000s of kgs and recruits were originally recorded in tens of numbers. Thus, plots look very discrete.
#' 
#' @section Topic(s):
#'  \itemize{
#'    \item Stock-Recruit
#'    \item Recruitment
#'  }
#' 
#' @concept Stock-Recruit
#' @concept Recruitment
#' 
#' @source From table 3 in Kipling, C. 1983. Changes in the population of pike (\emph{Esox lucius}) in Windermere from 1944 to 1981. Journal of Animal Ecology 52:989-999. \href{https://raw.githubusercontent.com/fishR-Core-Team/FSAdata/main/data-raw/PikeWindermere.csv}{CSV file}
#' 
#' @keywords datasets
#' 
#' @examples
#' data(PikeWindermere)
#' str(PikeWindermere)
#' head(PikeWindermere)
#' op <- par(mfrow=c(2,2),pch=19)
#' plot(recruits~year,data=PikeWindermere,subset=basin=="North",main="North")
#' plot(recruits~stock,data=PikeWindermere,subset=basin=="North",main="North")
#' plot(recruits~year,data=PikeWindermere,subset=basin=="South",main="South")
#' plot(recruits~stock,data=PikeWindermere,subset=basin=="South",main="South")
#' par(op)
#' 
#' 
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