Two measures of head width (head.width) for each of 25 walking sticks
(Timema cristinae).
Arguments
Format
A data frame with 50 observations on the following 2 variables.
specimen
a factor with levels 1-25
head.width
a numeric vector
Source
Nosil, P. and B.J. Crespi. 2006. Experimental evidence that
predation promotes divergence in adaptive radiation. Proceedings of
the National Academy of Sciences (USA) 103: 9090-9095.