abd (version 0.2-8)

Earwigs: Earwig Density and Forceps

Description

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

Format

A data frame with 7 observations on the following 2 variables.

density

a numeric vector

proportion.forceps

a numeric vector

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

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