https://github.com/cran/unmarked
Tip revision: ae6fc83197b65c0f55c96689caeb1868fbde14b7 authored by Richard Chandler on 22 January 2015, 00:00:00 UTC
version 0.10-5
version 0.10-5
Tip revision: ae6fc83
issj.Rd
\name{issj}
\alias{issj}
\docType{data}
\title{
Distance-sampling data for the Island Scrub Jay (\emph{Aphelocoma
insularis})
}
\description{
Data were collected at 307 survey locations ("point transects") on
Santa Cruz Island, California during the Fall of 2008. The distance
data are binned into 3 distance intervals
[0-100], (100-200], and (200-300]. The coordinates of the survey
locations as well as 3 habitat covariates are also included.
}
\usage{data(issj)}
\format{
A data frame with 307 observations on the following 8 variables.
\describe{
\item{\code{issj[0-100]}}{Number of individuals detected within 100m}
\item{\code{issj(100-200]}}{Detections in the interval (100-200m]}
\item{\code{issj(200-300]}}{Detections in the interval (200-300m]}
\item{\code{x}}{Easting (meters)}
\item{\code{y}}{Northing (meters)}
\item{\code{elevation}}{Elevation in meters}
\item{\code{forest}}{Forest cover}
\item{\code{chaparral}}{Chaparral cover}
}
}
\seealso{Island-wide covariates are also available \code{\link{cruz}}}
\references{
Sillett, S. and Chandler, R.B. and Royle, J.A. and Kery, M. and
Morrison, S.A. In Press. Hierarchical distance sampling models to
estimate population size and habitat-specific abundance of an island
endemic. \emph{Ecological Applications}
}
\examples{
data(issj)
str(issj)
head(issj)
umf <- unmarkedFrameDS(y=as.matrix(issj[,1:3]), siteCovs=issj[,6:8],
dist.breaks=c(0,100,200,300), unitsIn="m", survey="point")
summary(umf)
}
\keyword{datasets}