Analysis of Biochemical Composition of Three Stream Macroalgae Species
Aurélio F. Tonetto, Kassandra S. M. Oliveira, Tatiana M. Domingues

Abstract
Species of algae have great interest to society, especially because of their nutritional value in human diets. However, species pertaining to stream habitats have been neglected. Thus, we investigated the biochemical composition of three typical stream species of three different algal groups: Cyanobacteria – Lyngbya majuscula, Rhodophyta – Sirodotia delicatula and Chlorophyta – Oedogonium sp. Contents of protein, total lipid, carbohydrate, gross fiber and mineral composition were assessed. L. majuscula displayed high values for 45% of the compounds analysed. S. delicatula showed notable higher amount of zinc and lower content of gross fiber, while Oedogonium sp. registered higher values of total lipid, carbohydrates and calcium.

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