R/BullTroutRML2.R

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

#' @title Ages and lengths of Bull Trout from two Rocky Mountain lakes at two times.
#' 
#' @description Assigned ages (from otoliths) and fork lengths of Bull Trout (\emph{Salvelinus confluentis}) from two Rocky Mountain lakes in Alberta, CAN before and after a regulation change.
#' 
#' @note The historical (1977-1980) era samples were from before restrictive sportfishing regulatory regimes were implemented (in the 1990s) that led to changes in abundance and population structure of bull trout.
#' 
#' @name BullTroutRML2
#' 
#' @docType data
#' 
#' @format A data frame with 96 observations on the following 4 variables:
#'  \describe{
#'    \item{age}{Age (from otoliths).} 
#'    \item{fl}{Fork length (mm).}
#'    \item{lake}{Lake (\code{Harrison} and \code{Osprey}).} 
#'    \item{era}{Era of collection (\code{1977-80} and \code{1997-01}). See details.} 
#'  }
#' 
#' @section Topic(s):
#'  \itemize{
#'    \item Growth
#'    \item Von Bertalanffy growth model 
#'  }
#' 
#' @concept Growth
#' @concept Von Bertalanffy
#' 
#' @source From (approximately) Figure 2 of Parker, B.R., D.W. Schindler, F.M. Wilhelm, and D.B. Donald. 2007. Bull trout population responses to reductions in angler effort and retention limits. North American Journal of Fisheries Management 27:848-859. \href{https://raw.githubusercontent.com/fishR-Core-Team/FSAdata/main/data-raw/BullTroutRML2.csv}{CSV file}
#' 
#' @keywords datasets
#' 
#' @examples
#' data(BullTroutRML2)
#' str(BullTroutRML2)
#' head(BullTroutRML2)
#' op <- par(mfrow=c(2,2),pch=19)
#' plot(fl~age,data=BullTroutRML2,subset=lake=="Harrison" & era=="1977-80",main="Harrison, 1977-80")
#' plot(fl~age,data=BullTroutRML2,subset=lake=="Harrison" & era=="1997-01",main="Harrison, 1997-2001")
#' plot(fl~age,data=BullTroutRML2,subset=lake=="Osprey" & era=="1977-80",main="Osprey, 1977-80")
#' plot(fl~age,data=BullTroutRML2,subset=lake=="Osprey" & era=="1997-01",main="Osprey, 1997-2001")
#' par(op)
#' 
NULL