IJG  Vol.4 No.5 B , September 2013
Microcystin Accumulation in Nile Tilapia, Oreochromis niloticus and Giant Freshwater Prawns, Macrobrachium rosenbergii in Green Water System Cultivation
ABSTRACT

Phytoplankton including blue-green algal or cyanobacterial blooms frequently occurred in aquaculture ponds. Some cyanobacteria produced cyanotoxins that may accumulate in the food web and eventually in the aquaculture products. In this study, accumulatation of microcystins in Nile tilapia (Oreochromis niloticus) and giant freshwater prawn (Macrobrachium rosenbergii) cultured in green water system was investigated.Nile tilapia was cultured in green water system and fish food; green water system with Microcystis aeruginosa Kützingand fish food and green water system with M. aeruginosa. Giant freshwater prawn was cultured: in green water systems with and without toxic M. aeruginosa. Microcystins of 8.32±0.76 and9.35±1.45μg·kg—1 d.w. were detected in fish cultured in green water system with M. aeruginosa and fish food and in green water system with M. aeruginosa, respectively. Microcystins of 14.42±1.63 μg·kg—1 was found in prawn samples. It implied that aquaculture products were likely to be contaminated with microcystins. This finding is useful for aquaculture in terms of food safety.


Cite this paper
K. Ruangrit, Y. Peerapornpisal, J. Pekkoh and N. Whangchai, "Microcystin Accumulation in Nile Tilapia, Oreochromis niloticus and Giant Freshwater Prawns, Macrobrachium rosenbergii in Green Water System Cultivation," International Journal of Geosciences, Vol. 4 No. 5, 2013, pp. 60-63. doi: 10.4236/ijg.2013.45B010.
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