Vol.15, No. 1,January2016
Productivity, biochemical composition and biofiltering performance of agarophytic seaweed, Gelidium elegans (Red algae) grown in shrimp hatchery effluents in Malaysia
Description:1-Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia 2-Institute of Ocean and Earth Sciences (IOES), University of Malaya, 50603 Kuala Lumpur, Malaysia 3-Hormozgan Agriculture and Natural Resources Research and Education Center, Bandar Abbas, Iran 4 -Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran. *Corresponding author's email: r.rabiei6746@gmail.com
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Abstract
Aquaculture systems may release large amounts of nutrients into the marine ecosystem that can lead to eutrophication. Many seaweed species are efficient in reducing the nutrient concentration in aquaculture waste. In this study, the agarophyteGelidium elegans originating from Korea was investigated for bioremediation of tiger shrimp (Penaeus monodon) broodstock effluent (SBE) in a shrimp hatchery in Malaysia. TheG. elegans was cultivated in SBE using a semi-continuous culture system to evaluate the effects of elevated nutrients on the biomass, growth rate, quality and quantity of agar, pigment content and biochemical composition of seaweed. In the treatment containingG. elegans, pollutant nutrient concentration was reduced by 100%, and by 78.7%, 47.9%, and 19.6% for ammoniacal-nitrogen, nitrite, nitrate, and orthophosphate, respectively. The seaweed grew well (1.4 ±0.3% d-1) in SBE and produced appreciable amounts of protein (3.8% DW), carbohydrate (41.4% DW) and agar (25.9% DW), that were significantly enhanced when cultured in the SBE compared to control. The photosynthetic performance ofG. elegans assessment using a Diving-PAM showed the healthy condition of the grown seaweed without any indication of stress in shrimp hatchery effluent. Results showed thatG. elegans has biofiltering and bioremediation potential for the shrimp hatchery effluent.
Keywords:Gelidium elegans, Red seaweed, Bioremediation, Pulp, Agar, Biochemical, Malaysia
Author:Rabiei R.1,2, 3*; Phang S.M.1,2; Lim P.E.1,2; Salleh A.1; Sohrabipour J.1,2, 3; Ajdari D.4; Zarshen
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