Number of symbiotic algal cells within clades C1 or D in juvenile polyps during the first 4 months after inoculation.
Four juveniles were used to enumerate endosymbiont cells in each treatment and period. Values are means ± S.E. of the number of Symbiodinium algal cells per juvenile. The number above the bars for clade C1 at the day 20 indicates actual cell number. Asterisks indicate statistically significant differences resulting from t-tests: * P<0.05, ** P<0.01.