abd (version 0.1-21)

Earwigs: Earwig Density and Forceps

Description

Earwig (Forficula auricularia) density and the proportion of trapped earwigs with abdominal forceps (used for fighting and courtship).

Usage

data(Earwigs)

source

Tomkins, J.L. and G.S. Brown. 2004. Population density drives the local evolution of a threshold dimorphism. Nature 431: 1099-1103.

References

http://en.wikipedia.org/wiki/Forficula_auricularia

http://www.arkive.org/common-european-earwig/forficula-auricularia/

http://eol.org/pages/473785

Examples

data(Earwigs)
xyplot(proportion.forceps ~ density, data=Earwigs, type='h', lwd=6)