TITLE:
Microcystin Accumulation in Nile Tilapia, Oreochromis niloticus and Giant Freshwater Prawns, Macrobrachium rosenbergii in Green Water System Cultivation
AUTHORS:
Khomsan Ruangrit, Yuwadee Peerapornpisal, Jeeraporn Pekkoh, Niwooti Whangchai
KEYWORDS:
Microcystis aeruginosa Kützing; Microcystins; Aquaculture; Green Water System
JOURNAL NAME:
International Journal of Geosciences,
Vol.4 No.5B,
October
11,
2013
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.