The Agar Production, Pigment and Nutrient Content in Gracilaria sp. Grown in Two Habitats with Varying Salinity and Nutrient Levels

Jordan Journal of Biological Sciences

article

Ervia Yudiati¹  Annisa Afifah Nugroho¹  Sri Sedjati¹  Zaenal Arifin³  Ali Ridlo¹ 

[1] Department of Marine Science, Faculty of Fisheries and Marine Science, Diponegoro University;Laboratory of Marine Micro/Macroalgae Technology, Department of Marine Science, Faculty of Fisheries and Marine Science, Diponegoro University;Brackishwater Aquaculture Development Centre, Jl.Cik Lanang, Jepara, Central Java

关键词: Salinity;    Gracilaria sp.;    Agar;    Pigment;    Nutrient content;   

DOI  :  10.54319/jjbs/140416

学科分类：生物科学（综合）

来源: Hashemite University, Deanship of Research and Higher Studies

【 摘 要 】

Gracilaria sp. is rich in agar, pigment, carbohydrate and mineral contents. This study aims to determine the content of agar, chlorophyll a, carotenoids and nutrient content (protein, carbohydrate, total lipid, ash, water) in Gracilaria sp. grow in different habitats with high and low salinity. Samples were brought from high salinity (44+0.33) ppt from the reservoir habitat and low salinity (26.98+0.15 ppt) from biofilter’s shrimp waste pond habitat. Salinity and water quality parameteres were observed in three different subsites. Agar was extracted by alkali methods. Agar spectra were compared to standard agarose and characterized by FT-IR analysis. Results showed that agar content (25.79 ± 0.28%), chlorophyll a (25.79 ± 0.28 mg/g), carotenoid (5.90 ± 0.07 µmol/g) on low salinity was significantly higher (P<0.05) than high salinity. In high salinity, the agar (6.6+0.34%), chlorophyl a (3.62+0.15, carotenoids (0.71+0.1 µmol/g) contents was lower. The protein level of low salinity (14.4 ± 0.70%) was also significantly higher compared to high salinity (8.15+0.25%), respectively. The total lipid, carbohydrate, water, and ash content were similar. FT-IR analysis spectra show the presence of 3,6-anhydro-L-galactose. These can be useful data concerning optimum salinity in Gracilaria sp. culture.

【 授权许可】

CC BY