Figure 3.

Variability of holobiont respiration rate, animal host- and algal symbiont citrate synthase (CS) specific activities, host biomass, and symbiont density within a natural population of Exaiptasia pallida. (A,B,D) Linear regression analysis of algal symbiont density (cells mg⁻¹) as a predictor of (A) holobiont respiration rate normalized to host protein content (μmol O₂mg⁻¹ h⁻¹), (B) host CS specific activity (U mg⁻¹), and (D) symbiont CS specific activity (U mg⁻¹). (C) Linear regression analysis of natural-log-transformed host biomass (mg protein) as a predictor of natural-log-transformed host CS specific activity (U mg⁻¹). Relationships in (A–C) are statistically significant at p < 0.001 (D, p > 0.05). See text for details of multiple regression analysis of the data in (B,C).