Infection rates and infected Symbiodinium cell densities with different inoculated cell densities are shown.

Inoculated Symbiodinium cell densities were low (7 cells/cup = 1 cell/larva = 140 cells/L), medium (70 cells/cup = 10 cells/larva = 1400 cells/L), and high (700 cells/cup = 100 cells/larva = 14,000 cells/L).(a)Infection rates are the average ± SD of triplicate experiments.(b)Infected-cell densities are the average ± SE in infected larvae.