CrabShells2 {SRMData} | R Documentation |
Crab shells and anemones (2x2)
Description
The placement of anemones on their shells by hermit crabs.
Usage
data(CrabShells2)
Format
A data frame with 4 rows and 3 columns:
- ShellColumn
The column where anemone placed; one of
1
(Side) or2
(Central)- ShellRow
The row where anemone placed; one of
1
(Side) or2
(Central)- Counts
The number of anemones in the indicated sector on the shell
Details
The data provide the number of anemones placed on their shell by
hermit crabs in indicated regions.
Roughly, the shells are divided into a 3x3 grid of approximately
equal areas (see CrabShell3
) but here the 3x3 table has been
collapsed to a 2x2 table.
Source
Brooks, W. R. (1989). Hermit crabs alter sea anemone placement patterns for shell balance and reduced predation. Journal of Experimental Marine Biology and Ecology, 132(2), 109–121.
[Package SRMData version 1.0.1 Index]