Partridge and Farqaur (1981) studied the effect of the number of mating partners on the longevity of fruit flies. Five different mating treatments were applied to single male fruit flies. As a concomitant variable thorax length was measured.
data(fly.sex)
A data frame with 125 observations on the following 3 variables.
treatment
a factor with levels 1
= One virgin female per day, 2
= eight virgin females per day, 3
= a control group with one newly inseminated female per day, 4
= a control group with eight newly inseminated females per day,
and 5
a control group with no added females.
longevity
Age in days.
thorax
Thorax length in mm.
Partridge, L., and Farquhar, M. (1981), Sexual activity and the lifespan of male fruit flies, Nature 294, 580-581.