Blackbirds {abd}

Testosterone Levels in Blackbirds

Description

Experimental manipulation of testosterone levels in male Red-winged Blackbirds (Agelaius phoeniceus) and resulting changes in antibody levels

Format

A data frame with 13 observations on the following 6 variables.

before

a numeric vector

after

a numeric vector

log.before

a numeric vector

log.after

a numeric vector

diff.in.logs

a numeric vector

diff

a numeric vector

Source

Hasselquist, D., J.A. Marsh, P.W. Sherman, and J.C. Wingfield. 1999. Is avian immunocompetence suppressed by testosterone? Behavioral Ecology and Sociobiology 45: 167-175.

Examples

Blackbirds
xyplot(log.after ~ log.before, data = Blackbirds,
  ylab = "log Antibody production after implant",
  xlab = "log Antibody production before implant"
)