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Imposeks dalam siput haliah, Thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan Semenanjung Malaysia

Unintentional effects of the antifouling biocide tributyltin (TBT), produced mainly from marine paints, have been discovered in marine gastropods as an induction of male sex characters in females, a phenomena that is known as imposex. This imposex phenomenon is use d as a bioindicator of TBT contami...

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Main Author: Wagiman, Sukarno
Format: Thesis
Language:English
Published: 2004
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/id/eprint/3997/1/SukarnoWagimanPFKA2004.pdf
http://eprints.utm.my/id/eprint/3997/
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spelling my.utm.39972018-01-15T01:18:16Z http://eprints.utm.my/id/eprint/3997/ Imposeks dalam siput haliah, Thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan Semenanjung Malaysia Wagiman, Sukarno TA Engineering (General). Civil engineering (General) Unintentional effects of the antifouling biocide tributyltin (TBT), produced mainly from marine paints, have been discovered in marine gastropods as an induction of male sex characters in females, a phenomena that is known as imposex. This imposex phenomenon is use d as a bioindicator of TBT contamination. TBT, the active ingredient of antifouling paints, is one of the most toxic chemicals that Man has ever introduced into the marine environment. TBT-based antifouling paints are widely used in Malaysia and there is as yet any rule or regulation in controlling the usage of these paints. Field studies on imposex in the rock shell, Thais sp., and butyltin (BT) compound contamination in it and its sediments were conducted along the coast of Peninsula Malaysia. The percentage occurrence of imposex in Thais sp ., was in the range of 6 – 100 % at all sites surveyed (19 sites). Observed values of the Relative Penis Size Index (RPSI), defined as the ratio of mean penis size found in imposexed females to that in normal males, were between 0 and 109.21 %. Vas Deferens Sequence Index (VDSI) values ranged from 0 – 5. In some study sites, the rock shell populations were male -biased and matured gastropods dominated the population. Levels of butyltin compounds in rock shells and sedime nts from 12 sites were determined using gas chromatograph-flame photometry detectors (GC -FPD). The results indicated widespread contamination of butyltin compounds in the surrounding water of the Straits of Malacca and South China Sea. TBT concentration in the rock shells and sediments ranged 3.9 – 650 ng g-1 wet weight and 0 – 700 ng g- 1 dry weight, respectively. High concentrations of TBT were detected in samples from areas with high shipping activity, ports, jetties, marinas and dockyards. A positive relation existed between the concentration of TBT in rock shells and the development of imposex. The mechanisms leading to annual input of TBT to the waters of the Straits of Malacca and the South China Sea from shipping was discussed and estimated at 70.23 tonnes. 2004-07 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/3997/1/SukarnoWagimanPFKA2004.pdf Wagiman, Sukarno (2004) Imposeks dalam siput haliah, Thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan Semenanjung Malaysia. PhD thesis, Universiti Teknologi Malaysia, Faculty of Civil Engineering.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Wagiman, Sukarno
Imposeks dalam siput haliah, Thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan Semenanjung Malaysia
description Unintentional effects of the antifouling biocide tributyltin (TBT), produced mainly from marine paints, have been discovered in marine gastropods as an induction of male sex characters in females, a phenomena that is known as imposex. This imposex phenomenon is use d as a bioindicator of TBT contamination. TBT, the active ingredient of antifouling paints, is one of the most toxic chemicals that Man has ever introduced into the marine environment. TBT-based antifouling paints are widely used in Malaysia and there is as yet any rule or regulation in controlling the usage of these paints. Field studies on imposex in the rock shell, Thais sp., and butyltin (BT) compound contamination in it and its sediments were conducted along the coast of Peninsula Malaysia. The percentage occurrence of imposex in Thais sp ., was in the range of 6 – 100 % at all sites surveyed (19 sites). Observed values of the Relative Penis Size Index (RPSI), defined as the ratio of mean penis size found in imposexed females to that in normal males, were between 0 and 109.21 %. Vas Deferens Sequence Index (VDSI) values ranged from 0 – 5. In some study sites, the rock shell populations were male -biased and matured gastropods dominated the population. Levels of butyltin compounds in rock shells and sedime nts from 12 sites were determined using gas chromatograph-flame photometry detectors (GC -FPD). The results indicated widespread contamination of butyltin compounds in the surrounding water of the Straits of Malacca and South China Sea. TBT concentration in the rock shells and sediments ranged 3.9 – 650 ng g-1 wet weight and 0 – 700 ng g- 1 dry weight, respectively. High concentrations of TBT were detected in samples from areas with high shipping activity, ports, jetties, marinas and dockyards. A positive relation existed between the concentration of TBT in rock shells and the development of imposex. The mechanisms leading to annual input of TBT to the waters of the Straits of Malacca and the South China Sea from shipping was discussed and estimated at 70.23 tonnes.
format Thesis
author Wagiman, Sukarno
author_facet Wagiman, Sukarno
author_sort Wagiman, Sukarno
title Imposeks dalam siput haliah, Thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan Semenanjung Malaysia
title_short Imposeks dalam siput haliah, Thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan Semenanjung Malaysia
title_full Imposeks dalam siput haliah, Thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan Semenanjung Malaysia
title_fullStr Imposeks dalam siput haliah, Thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan Semenanjung Malaysia
title_full_unstemmed Imposeks dalam siput haliah, Thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan Semenanjung Malaysia
title_sort imposeks dalam siput haliah, thais sp. sebagai penunjuk biologi pencemaran tributiltimah di perairan semenanjung malaysia
publishDate 2004
url http://eprints.utm.my/id/eprint/3997/1/SukarnoWagimanPFKA2004.pdf
http://eprints.utm.my/id/eprint/3997/
_version_ 1643643939840851968
score 13.211869

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