Determination of total mercury in fishes of Murum, Bakun and Batang Ai hydroelectric reservoirs

The objectives of this study were to determine and compare THg concentration in fish sampled from three reservoir namely, Murum, Bakun and Batang Ai Hydroelectric Reservoirs. The samples were digested and diluted into 100 mL. A mercury analyser was used to determine the total mecury content in the s...

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Main Author: Kho, Liang Ping
Format: Final Year Project Report
Language:English
Published: Universiti Malaysia Sarawak, (UNIMAS) 2015
Subjects:
Online Access:http://ir.unimas.my/id/eprint/10815/4/Kho%20full.pdf
http://ir.unimas.my/id/eprint/10815/
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spelling my.unimas.ir.108152023-08-07T06:50:01Z http://ir.unimas.my/id/eprint/10815/ Determination of total mercury in fishes of Murum, Bakun and Batang Ai hydroelectric reservoirs Kho, Liang Ping GE Environmental Sciences S Agriculture (General) SF Animal culture SH Aquaculture. Fisheries. Angling The objectives of this study were to determine and compare THg concentration in fish sampled from three reservoir namely, Murum, Bakun and Batang Ai Hydroelectric Reservoirs. The samples were digested and diluted into 100 mL. A mercury analyser was used to determine the total mecury content in the samples. The moisture contents of 16 fish species (Barbonymus schwanenfeldii, Cyclocheilichthys apogon, Cyclocheilichthys armatus, Hampala bimaculata, Hampala macrolepidota, Hemibagrus planiceps, Lobocheilos bo, Lobocheilos falcifer, Oreochromis niloticus, Oreochromis mossambicus, Osphronemus goramy, Osteochilus hasseltii, Osteochilus waandersii, Pangasius micronemus, Puntioplites waandersi and Puntius binotatus) were ranged from 75.9% to 84.0%. Results showed that the THg content present in fish collected from Murum hydroelectric reservoir (n.d. – 3.10 mg/kg dry weight) was the highest followed by Bakun (0.19 – 2.37 mg/kg) and then Batang Ai Hydroelectric Reservoir (0.08 – 1.25 mg/kg). Statistical analysis illustrated that the concentration of THg in fish species from each reservoirs and among the three reservoirs were significantly different (P < 0.05) from each other. Higher trophic level of fish species tends to accumulate more Hg than lower trophic level of fish species. This may be associated to the impoundment history as literature suggests that fishes caught from a newly impounded dam tend to have higher mercury content within 5 to 35 years after impoundment. Universiti Malaysia Sarawak, (UNIMAS) 2015 Final Year Project Report NonPeerReviewed text en http://ir.unimas.my/id/eprint/10815/4/Kho%20full.pdf Kho, Liang Ping (2015) Determination of total mercury in fishes of Murum, Bakun and Batang Ai hydroelectric reservoirs. [Final Year Project Report] (Unpublished)
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
language English
topic GE Environmental Sciences
S Agriculture (General)
SF Animal culture
SH Aquaculture. Fisheries. Angling
spellingShingle GE Environmental Sciences
S Agriculture (General)
SF Animal culture
SH Aquaculture. Fisheries. Angling
Kho, Liang Ping
Determination of total mercury in fishes of Murum, Bakun and Batang Ai hydroelectric reservoirs
description The objectives of this study were to determine and compare THg concentration in fish sampled from three reservoir namely, Murum, Bakun and Batang Ai Hydroelectric Reservoirs. The samples were digested and diluted into 100 mL. A mercury analyser was used to determine the total mecury content in the samples. The moisture contents of 16 fish species (Barbonymus schwanenfeldii, Cyclocheilichthys apogon, Cyclocheilichthys armatus, Hampala bimaculata, Hampala macrolepidota, Hemibagrus planiceps, Lobocheilos bo, Lobocheilos falcifer, Oreochromis niloticus, Oreochromis mossambicus, Osphronemus goramy, Osteochilus hasseltii, Osteochilus waandersii, Pangasius micronemus, Puntioplites waandersi and Puntius binotatus) were ranged from 75.9% to 84.0%. Results showed that the THg content present in fish collected from Murum hydroelectric reservoir (n.d. – 3.10 mg/kg dry weight) was the highest followed by Bakun (0.19 – 2.37 mg/kg) and then Batang Ai Hydroelectric Reservoir (0.08 – 1.25 mg/kg). Statistical analysis illustrated that the concentration of THg in fish species from each reservoirs and among the three reservoirs were significantly different (P < 0.05) from each other. Higher trophic level of fish species tends to accumulate more Hg than lower trophic level of fish species. This may be associated to the impoundment history as literature suggests that fishes caught from a newly impounded dam tend to have higher mercury content within 5 to 35 years after impoundment.
format Final Year Project Report
author Kho, Liang Ping
author_facet Kho, Liang Ping
author_sort Kho, Liang Ping
title Determination of total mercury in fishes of Murum, Bakun and Batang Ai hydroelectric reservoirs
title_short Determination of total mercury in fishes of Murum, Bakun and Batang Ai hydroelectric reservoirs
title_full Determination of total mercury in fishes of Murum, Bakun and Batang Ai hydroelectric reservoirs
title_fullStr Determination of total mercury in fishes of Murum, Bakun and Batang Ai hydroelectric reservoirs
title_full_unstemmed Determination of total mercury in fishes of Murum, Bakun and Batang Ai hydroelectric reservoirs
title_sort determination of total mercury in fishes of murum, bakun and batang ai hydroelectric reservoirs
publisher Universiti Malaysia Sarawak, (UNIMAS)
publishDate 2015
url http://ir.unimas.my/id/eprint/10815/4/Kho%20full.pdf
http://ir.unimas.my/id/eprint/10815/
_version_ 1775627177690136576
score 13.211869