Analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on Oreochromis spp (IR)

This study aims to analyse the abundance of toxic cyanobacterial in selected aquaculture systems and its effect on Oreochromis spp. In this study, a total of forty freshwater fish aquaculture ponds were sampled from ten different locations in Perak, Malaysia. To analyse the effects of naturally-occu...

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Main Author:	Ann Sinden
Format:	thesis
Language:	zsm
Published:	2016
Subjects:	QR Microbiology
Online Access:	https://ir.upsi.edu.my/detailsg.php?det=2844
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spelling	oai:ir.upsi.edu.my:28442020-02-27 Analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on Oreochromis spp (IR) 2016 Ann Sinden QR Microbiology This study aims to analyse the abundance of toxic cyanobacterial in selected aquaculture systems and its effect on Oreochromis spp. In this study, a total of forty freshwater fish aquaculture ponds were sampled from ten different locations in Perak, Malaysia. To analyse the effects of naturally-occurring microcystins concentration in Perak aquaculture environments on fish, Oreochromis spp. fingerlings were cultured in water treated with cyanobacterial extracts in the laboratory. Study results revealed that the most commonly found cyanobacterial taxa in Perak aquaculture systems was Microcystis spp. During the sampling periods, the majority of the sampled ponds water were under cyanobacterial bloom and contained unsafe concentration of microcystins exceeding 20 g/L. A combination of temperature and pH was correlated to the proliferation of cyanobacteria and its toxicity in the selected aquaculture ponds. Microcystins accumulated in fish tissues were dependent on the concentration of microcystins in the surrounding water. Despite high microcystins bioaccumulation, this study discovered that microcystin concentrations did not give impacts to the survival and growth of Oreochromis spp. These findings illustrated the potential health risk of toxic cyanobacteria through fish consumption in Malaysia which can be two to three orders of magnitude higher than the tolerable daily intake guideline (0.04 g MC-LR / kg body weight per day) recommended by World Health Organization. In conclusion, the abundance of toxic cyanobacteria in Malaysia aquaculture systems may cause accumulation by fish at a harmful level. As an implication, this study can serve as a guide on the occurrence of toxic cyanobacteria in our freshwater systems particularly in aquaculture ponds, as well as its potential bioaccumulation in aquatic organisms which may lead to significant health threat to human through food web. 2016 thesis https://ir.upsi.edu.my/detailsg.php?det=2844 https://ir.upsi.edu.my/detailsg.php?det=2844 text zsm closedAccess Masters Universiti Pendidikan Sultan Idris Fakulti Sains dan Matematik N/A
institution	Universiti Pendidikan Sultan Idris
collection	UPSI Digital Repository
language	zsm
topic	QR Microbiology
spellingShingle	QR Microbiology Ann Sinden Analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on Oreochromis spp (IR)
description	This study aims to analyse the abundance of toxic cyanobacterial in selected aquaculture systems and its effect on Oreochromis spp. In this study, a total of forty freshwater fish aquaculture ponds were sampled from ten different locations in Perak, Malaysia. To analyse the effects of naturally-occurring microcystins concentration in Perak aquaculture environments on fish, Oreochromis spp. fingerlings were cultured in water treated with cyanobacterial extracts in the laboratory. Study results revealed that the most commonly found cyanobacterial taxa in Perak aquaculture systems was Microcystis spp. During the sampling periods, the majority of the sampled ponds water were under cyanobacterial bloom and contained unsafe concentration of microcystins exceeding 20 g/L. A combination of temperature and pH was correlated to the proliferation of cyanobacteria and its toxicity in the selected aquaculture ponds. Microcystins accumulated in fish tissues were dependent on the concentration of microcystins in the surrounding water. Despite high microcystins bioaccumulation, this study discovered that microcystin concentrations did not give impacts to the survival and growth of Oreochromis spp. These findings illustrated the potential health risk of toxic cyanobacteria through fish consumption in Malaysia which can be two to three orders of magnitude higher than the tolerable daily intake guideline (0.04 g MC-LR / kg body weight per day) recommended by World Health Organization. In conclusion, the abundance of toxic cyanobacteria in Malaysia aquaculture systems may cause accumulation by fish at a harmful level. As an implication, this study can serve as a guide on the occurrence of toxic cyanobacteria in our freshwater systems particularly in aquaculture ponds, as well as its potential bioaccumulation in aquatic organisms which may lead to significant health threat to human through food web.
format	thesis
qualification_name
qualification_level	Master's degree
author	Ann Sinden
author_facet	Ann Sinden
author_sort	Ann Sinden
title	Analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on Oreochromis spp (IR)
title_short	Analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on Oreochromis spp (IR)
title_full	Analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on Oreochromis spp (IR)
title_fullStr	Analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on Oreochromis spp (IR)
title_full_unstemmed	Analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on Oreochromis spp (IR)
title_sort	analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on oreochromis spp (ir)
granting_institution	Universiti Pendidikan Sultan Idris
granting_department	Fakulti Sains dan Matematik
publishDate	2016
url	https://ir.upsi.edu.my/detailsg.php?det=2844
_version_	1747833040082567168

Analysis of toxic cyanobacterial abundance in selected aquaculture systems and its effect on Oreochromis spp (IR)

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