Microcystis aeruginosa bloom and the occurrence of microcystins (heptapeptides hepatotoxins) from an aquaculture pond in Gazipur, Bangladesh
Abstract
Bangladesh is a tropical country of large alluvial plain with 1.3 million freshwater ponds and lakes and has a proper environment for luxuriant growth of cyanobacteria. Algal bloom of Microcystis aeruginosa occurred in an aquaculture pond in Gazipur, Dhaka. Bloom sample was collected and filtered through a glass fiber filter. Methanol-water extract of filtered cells were analyzed by high performance liquid chromatography (HPLC) with UV, MS and MS-MS detection, detected three types of microcystins viz., Microcystin-RR, Microcystin-YR and Microcystin-LR and those were confirmed by HPLC-MS. The amount of MC-LR was the highest (33.2 μgl-1) followed by MC-RR (9.03 μgl-1) and MC-YR (5.23 μgl-1). The concentration of microcystins was well above the WHO provisional guideline value of 1 g l-1 MC-LR. Further, investigations need to characterize other types of microcystins from bloom forming cyanobacteria and their effect on human health and cultured fish in Bangladesh.
Microcystis aeruginosa bloom and the occurrence of microcystins (heptapeptides hepatotoxins) from an aquaculture pond in Gazipur, Bangladesh
Abstract
Bangladesh is a tropical country of large alluvial plain with 1.3 million freshwater ponds and lakes and has a proper environment for luxuriant growth of cyanobacteria. Algal bloom of Microcystis aeruginosa occurred in an aquaculture pond in Gazipur, Dhaka. Bloom sample was collected and filtered through a glass fiber filter. Methanol-water extract of filtered cells were analyzed by high performance liquid chromatography (HPLC) with UV, MS and MS-MS detection, detected three types of microcystins viz., Microcystin-RR, Microcystin-YR and Microcystin-LR and those were confirmed by HPLC-MS. The amount of MC-LR was the highest (33.2 μgl-1) followed by MC-RR (9.03 μgl-1) and MC-YR (5.23 μgl-1). The concentration of microcystins was well above the WHO provisional guideline value of 1 g l-1 MC-LR. Further, investigations need to characterize other types of microcystins from bloom forming cyanobacteria and their effect on human health and cultured fish in Bangladesh.
Details
| Primary Language | Turkish |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | February 1, 2008 |
| Published in Issue | Year 2008 Volume: 8 Issue: 1 |