Figure 1.

Proportion of Daphnia infected with the fungal parasite Metschnikowia bicuspidata, and the bacterial parasite Pasteuria ramosa, on nine phytoplankton diets. Daphnia were exposed either in single parasite treatments (a) or co-infection treatments (b). Prevalence was calculated as the proportion (means ± s.e.) of infected Daphnia out of all exposed individuals. Note that not all individuals in the co-infection treatments (b) became infected with both parasite species. Abbreviations for phytoplankton names: Ana—Anabaena, Mic—Microcystis, Mic+—Microcystis spiked with additional microcystin, Nod—Nodularia, Ank—Ankistrodesmus, Chla—Chlamydomonas, Chlo—Chlorella, Sce—Scenedesmus, Ulo—Ulothrix. For single Metschnikowia infection n = (10, 9, 9, 10, 10, 10, 8, 10, 9), for single Pasteuria infection n = (10, 9, 8, 9, 9, 7, 9, 10, 10), and for co-infection n = (9, 10, 9, 10, 10, 10, 10, 10, 10) all in order of diet. See electronic supplementary material, table S2 for a summary of the statistical analyses. (Online version in colour.)