An experimental test of the effects of behavioral and immunological defenses against vectors: do they interact to protect birds from blood parasites?

Table 1 No influence of host anti-vector defenses on infection dynamics of the blood parasite H. columbae

Measure	Preening defense	Immune defense	Interaction	Data transformation	Analysis
Prevalence	P = 1.00		NA	none	Fisher’s Exact Test
Peak infection intensity	P = 0.134, F_1,44 = 2.33	P = 1.00, F_1,44 = 0.0	P = 0.614, F_1,44 = 0.259	ranked	2-way ANOVA
Prepatent period	P = 0.214, F_1,43 = 1.593	P = 0.715, F_1,43 = 0.136	P = 0.827, F_1,43 = 0.048	none	2-way ANOVA
Total parasites over the course of infection	P = 0.319, F_1,44 = 1.014	P = 0.802, F_1,44 = 0.063	P = 0.454, F_1,44 = 0.571	ranked	2-way ANOVA
Rate of increase to peak	P = 0.079, F_1,44 = 3.237	P = 0.610, F_1,44 = 0.264	P = 0.798, F_1,44 = 0.066	ranked	2-way ANOVA
Rate of clearance from peak	P = 0.135, F_1,44 = 2.343	P = 0.801, F_1,44 = 0.065	P = 0.801, F_1,44 = 0.065	ranked	2-way ANOVA
% hosts that cleared the infection	P = 1.00		NA	none	Fisher’s Exact Test

(Non-normally distributed data were rank-transformed within each replicate to normalize them; rankings were compared using two-way ANOVAs).

ISSN: 1756-3305