Here is a revision of the graphic that I posted earlier for my master’s thesis and a poster I did for the 2006 Evolution meetings. This version is, in my opinion, greatly improved. Thanks to Tia-Lynn Ashman, Ceriese Allen, and Naoki Takebayashi for their comments during the poster session.

(above) Pie graphs in the figure show the infection
prevalence (percent infected in white) of Microphallus in
P. antipodarum hosts. Treatments consisted of either
same sex or cohabitating conditions. Infection was
determined as the presence or absence of Microphallus.
Within the all female treatment, likelihood ratio chi-
squared analysis revealed a significant relationship
between infection status and ploidy (LRX2=59.62; df=2;
n=276; Sig. p < .001). Males were more infected than
females (t34 = 6.9, P < 0.001). Ploidy was not determined
for the all male treatment.