Growth of Gracilaria manilaensis Yamamoto et Trono (Rhodophyta) under different light intensities, salinities and pH

Mohd Hidayat, Nor Salamah and Mohammad Noor, Normawaty and Mohamad, Mohd Azrul Naim and Abdullah, Najatul Su Ad and Rusly, Siti Amira Sariyathul and Saad, Shahbuddin and Mukai, Yukinori and Darnis, Deny Susanti (2021) Growth of Gracilaria manilaensis Yamamoto et Trono (Rhodophyta) under different light intensities, salinities and pH. Borneo Journal of Marine Science and Aquaculture, 5 (2). pp. 53-56. ISSN 2600−8882

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Abstract

Previous studies have demonstrated that the seaweed, Gracilaria manilaensis, has a high potential of producing agar for the food industry, and is a promising candidate as a dietary supplement for treating cancer and neurological disorders. Unfortunately, not many farms culturing G. manilaensis existed particularly in Malaysia. One of the reasons is limited knowledge of suitable environmental conditions needed for efficient production of the seaweed. Therefore, this study was carriedouttoidentifythebestgrowthconditionsforG.manilaensisunderdifferentlightintensities,salinitiesandpH. To achieve this objective, Gracilaria sp. was collected from a farm and identified based on morphological characteristics before being subjected to three environmental variables simultaneously: light intensities (100 and 1000 lux), salinities (15, 20, 25 and 30 psu) and pH (7.6, 7.8 and 8.0) simultaneously. Specific growth rates were determined for all the treatments. The results showed that G. manilaensis preferred high light intensity (1000 lux), with the growth rate of 1.69 ± 0.08 g/days at the salinity of 15 psu and pH 7.6. No significant differences were found between salinity and growth rate, indicating that G. manilaensis can tolerate a wide range of salinity. The knowledge gained from this study can be used as a guide to increasing the production of G. manilaensis in indoor farming systems. This will ensure sustainable research for G. manilaensis and production

Item Type:	Article (Journal)
Uncontrolled Keywords:	Mariculture, Gracilaria, Rhodophyta, Seaweed, Growth rate
Subjects:	Q Science > Q Science (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Marine Science
Depositing User:	Dr Normawaty Mohammad Noor
Date Deposited:	09 Dec 2021 15:40
Last Modified:	09 Nov 2022 10:05
URI:	http://irep.iium.edu.my/id/eprint/94620

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