Figure 1.
Changes in photosynthetic and respiratory activity in E. chlorotica symbiotically associated with V. litorea chloroplasts and cultured over a 7-month period in the absence of algae. Apparent photosynthesis was calculated by measuring the rate of CO2- and light-dependent O2 evolution. Respiration rates were based on the uptake of O2 in the dark. Gross photosynthesis was estimated by summing the apparent photosynthesis and respiration rates. Data represent means ± se of at least three sea slugs for each time point.