Daphnia Resistance to Cyanobacteria

Resistance of Daphnia eggs to different levels of cyanobacteria (cyandensity) from 1962-1997.

Usage

DaphniaResistance

Format

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.

Examples

str(DaphniaResistance)
#> 'data.frame':	32 obs. of  2 variables:
#>  $ density   : Factor w/ 3 levels "high","low","med": 1 1 1 1 1 1 1 1 1 1 ...
#>  $ resistance: num  0.65 0.73 0.74 0.76 0.81 0.82 0.85 0.86 0.88 0.9 ...


bwplot(resistance ~ density, DaphniaResistance)

# with such a small data set, we can display all the data
# rather than a summary
xyplot(resistance ~ density, DaphniaResistance)

histogram(~ resistance| density, DaphniaResistance,
           strip=FALSE, strip.left = TRUE,
           layout=c(1,3)
           )