Hadis Jafari; Farnaz Rafiee; Aria Ashja Ardalan
Abstract
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 ...
Read More
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.
Farnaz Rafiee; parisa nejatkhah manavi; hadise kermanshai
Abstract
Effect of temperature, irradiance and photoperiod on biomass and the alginate content of Sargassum boveanum was evaluated for 42 days under laboratory conditions. The seaweed samples were collected from coast lines of Bandae-e-Lengeh in Hormozgan province (South of Iran) in June 2009. The algae were ...
Read More
Effect of temperature, irradiance and photoperiod on biomass and the alginate content of Sargassum boveanum was evaluated for 42 days under laboratory conditions. The seaweed samples were collected from coast lines of Bandae-e-Lengeh in Hormozgan province (South of Iran) in June 2009. The algae were suspended in aquariums,40.30.60 cm (20 litter) in 3 replicates. The algae were cultured under temperatures gradients ( 15,20 and 25 ºC ), irradiances levels (4700,5700 and 6700 Lux) and three photoperiods (12;12, 14;10 and 16:8 hours, Light:Dark) . The algae were weighted once a week . After 6 weeks of experiments, the algae were collected, dried and weighed. The highest biomass of S. boveanum was obtained at 25° c (48.12 gr.) ,4700 Lux (42.48 gr) 12:12, light: dark (34 gr). Maximum content of alginate (29.67%) was extracted in temperature of 25 ºC. As the results showed, mariculture of this algae should done in spring with optimum of temperature and photoperiod. The alginate content of S. boveanum in this project is high in compare with the other studies.
