The biochemical composition and its relation to color of Ulva spp. upon harvest time

Green seaweed species of the genus Ulva are promising protein sources for food production. Various factors affect the biochemical composition of Ulva spp. (hereafter Ulva), which can complicate the utilization in a commercial scale food production. This study investigated the composition of Ulva harvested in 2021 in May (dark green/black biomass), June (light green biomass) and August (mixed colored biomass). The August harvest was divided into three different color codes: light green, green, and dark green/black, to explore a relation between color and composition as an indicator for biomass quality. The crude protein (CP) and ash contents were highest in the dark August biomass (16.4±0.4