abd (version 0.2-6)

Blackbirds: Testosterone Levels in Blackbirds

Description

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

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

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