prefer: Habitat preference data for pheasants
In Blossom: Statistical Comparisons with Distance-Function Based Permutation Tests

Description Usage Format Details Source Examples

Habitat preference data for 13 pheasants using 5 cover types (Aebischer et al. 1993) for randomized block analyses.

1	data(prefer)

A data frame with 26 observations on the following 7 variables.

scrub: Percentage of scrub cover type.
broad: Percentage of broadleaf woodland cover type.
conifer: Percentage of conifer woodland cover type.
grass: Percentage of grass cover type.
crop: Percentage of crop cover type.
use: Grouping value taking a 1 if used by a bird and a 0 if available habitat.
bird: The numbers 1 to 13 indicating individual birds.

In the randomized block analysis of this data, bird is the blocking factor and use is the treatment groups. Note the available habitat (use = 0) percentages are assumed constant across all birds.

Aebischer, N.J., P. A. Robertson, and R.E. Kenward. 1993. Compositional analysis of habitat use from animal radio-tracking data. Ecology 74, 1313–1323.

str(prefer)
  boxplot(prefer[1:13,1:5],main = "Percent habitat in the home range of 13 ring-necked pheasants")
     mtext("red dots indicate percent habitat available for each land cover class")
     points(seq(1:5),prefer[14,1:5],cex = 2,pch = 21,bg = "red")