Determining the amount of some chemical compounds of the dominant species of brown algae in Lengeh port،Hormozgan province

In this study, some biochemical compounds taxa of brown algae, belonging to 5 different genera in Lengeh port, Hormozgan province, including Sargassum vulgare (C. Agardh, 1820), Padina australis (Hauck, 1887), Cystoseira myrica (C. Agardh, 1820) Colpomenia sinousa (Derbes & Solier, 1851) and Iyengaria sp. (Borgesen) were studied in winter (February 2019) and summer (July 2018) and algae were collected at low tide. Extraction of protein was performed by Lowry method, lipid by Freeman method, carbohydrate by phenol sulfuric acid method and alginate by Istini method. The highest percentage of protein from algae Cystoseira myrica 2.7 % in February, lipid with 75 % of the algae Padina australis in February, by 3.4%, carbohydrates from algae Sargassum vulgare in February and alginate with 30% was achieved in July. The mean difference of these compounds between February and July was significant (P <0.05). According to the obtained results, considering the high amount of lipid in the algae of this study, they can be used to increase the fat content of animal milk. Also, the alginate obtained in this study has a suitable amount among the brown algae studied and it can be extracted for useing in various industries.