Algae Growth Monitoring with CASY

Monitor Algae Growth and Budding with Precision

Animated CASY size distribution of Raphidocelis subcapitata: during budding the peak of the mother cells at about 6 µm gives way to a growing peak of daughter cells at about 3 µm

Raphidocelis subcapitata, a freshwater alga widely used in environmental testing, shows synchronized growth and budding under light exposure. CASY provides precise, real-time quantification of this process. With a cell size of ~6 µm, each mother cell produces four daughter cells. As budding begins, daughter cells emerge and increase over a 4–5 hour window while mother cells nearly disappear - patterns that CASY accurately tracks.

CASY also streamlines algae standardization for Daphnia feeding assays. Because feeding behavior varies with water quality, CASY measures both the initial algae concentration and the remaining amount after one hour, enabling reliable and consistent assay results.

Diagram of the feeding rate assay: a control and an exposed Daphnia in algae suspension at the start and after one hour, the control vessel clearly lighter

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