Description

Data on cell-mediated immunocompetence (PHA) and humoral immunity (SRBC) in Zebra Finches that received supplemental carotenoids (CAROT) and those that did not (NO).

Format

A data frame with 20 observations on the following 3 variables.

treatment

a factor with levels: CAROT and NO

PHA

a numeric vector

SRBC

a numeric vector

Source

McGraw, K.J. and D.R. Ardia. 2003. Carotenoids, immunocompetence, and the information content of sexual colors: an experimental test. The American Naturalist 162: 704-712.

Examples