Resistance of Daphnia eggs to different levels of cyanobacteria
(cyandensity) from 1962-1997.
A data frame with 32 observations on the following 2 variables.
- density
a factor with levels: high,
low, and med
- resistance
a numeric vector
Source
inferred from Hairston, N.G., Jr., W. Lampert, C.E. Cáceres,
C.L. Holtmeier, L.J. Weider, U. Gaedke, J.M. Fischer, J.A. Fox, and D.M.
Post. 1999. Dormant eggs record rapid evolution. Nature 401: 446.