Linear Mask for Water Vole Dataset
Habitat geometry for a trapping study of water voles (Arvicola amphibius) along a river in Oxfordshire, U.K., used in conjunction with the capture dataset arvicola.
glymemask
A linearmask object (see read.linearmask)
Water voles were trapped monthly from May 1984 to May 1985 along 0.9 km of the River Glyme in Oxfordshire, U.K. (Efford 1985).
The raw data are provided both as a text file and as a shapefile in the ‘extdata’ folder of the secrlinear installation. The vignette ../doc/secrlinear-vignette.pdf shows how to import the data, which are also provided here as an secr object.
M. G. Efford unpublished data.
Efford, M. G. (1985) The structure and dynamics of water vole populations. D.Phil thesis, University of Oxford.
plot(glymemask) summary(glymemask) ## add a covariate, the distance downstream from the first mask point downstrm <- networkdistance(glymemask, glymemask[1,], glymemask)[,1] covariates(glymemask)<- data.frame(downstream = downstrm)
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