Toxicity Study Of Isoprothiolane On Macrobrachium Lanchesteri In Surface Water Of Paddy Field Ecosystem

The application of isoprothiolane in rice cultivation may give risk to the aquatic ecosystem. The present study was undertaken to determine the level of isoprothiolane in surface water of paddy fields and consequently, to determine the acute and chronic toxicity level of isoprothiolane to freshwater...

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Main Author:	Rahman, Muhammad Radzi Abd
Format:	Thesis
Language:	English
Published:	2019
Subjects:	TA1-2040 Engineering (General) Civil engineering (General)
Online Access:	http://eprints.usm.my/49077/1/full%20thesis%20by%20RADZI%20cut.pdf
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id	my-usm-ep.49077
record_format	uketd_dc
spelling	my-usm-ep.490772021-05-03T07:17:50Z Toxicity Study Of Isoprothiolane On Macrobrachium Lanchesteri In Surface Water Of Paddy Field Ecosystem 2019-08 Rahman, Muhammad Radzi Abd TA1-2040 Engineering (General). Civil engineering (General) The application of isoprothiolane in rice cultivation may give risk to the aquatic ecosystem. The present study was undertaken to determine the level of isoprothiolane in surface water of paddy fields and consequently, to determine the acute and chronic toxicity level of isoprothiolane to freshwater prawn, Macrobrachium lanchesteri. LC50 or lethal concentration for 50 percent mortality in population was used as the endpoint for acute toxicity level while for chronic, no-observed effect concentration (NOEC) is preferable. Prediction on chronic toxicity level was determined using assessment factor and two-step linear regression (LRA) method. The predicted no-observed effect concentration (PNEC) was compared to the NOEC value from 21 days chronic test to determine the conservativeness between the prediction and the experimental value. Water samples from 12 sampling points were collected from sampling sites and extracted by solid phase extraction method. The samples were then analysed by gas chromatography-mass spectrometry (GC-MS) to quantify the concentration of isoprothiolane detected in the samples. Isoprothiolane residue was detected in both the vegetative stage (maximum tillering) and ripening stage of paddy growth. The concentration of isoprothiolane residue found in the ripening stage was higher than in the vegetative stage. The highest amount of isoprothiolane residue detected was at 9.37 mg/L from water sample collected at sampling point 5 (S5) at the ripening stage. LC50 of isoprothiolane on M. lanchesteri was determined after 96 hours of exposure, interpreted by Probit analysis from SPSS software. 2019-08 Thesis http://eprints.usm.my/49077/ http://eprints.usm.my/49077/1/full%20thesis%20by%20RADZI%20cut.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Awam
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TA1-2040 Engineering (General) Civil engineering (General)
spellingShingle	TA1-2040 Engineering (General) Civil engineering (General) Rahman, Muhammad Radzi Abd Toxicity Study Of Isoprothiolane On Macrobrachium Lanchesteri In Surface Water Of Paddy Field Ecosystem
description	The application of isoprothiolane in rice cultivation may give risk to the aquatic ecosystem. The present study was undertaken to determine the level of isoprothiolane in surface water of paddy fields and consequently, to determine the acute and chronic toxicity level of isoprothiolane to freshwater prawn, Macrobrachium lanchesteri. LC50 or lethal concentration for 50 percent mortality in population was used as the endpoint for acute toxicity level while for chronic, no-observed effect concentration (NOEC) is preferable. Prediction on chronic toxicity level was determined using assessment factor and two-step linear regression (LRA) method. The predicted no-observed effect concentration (PNEC) was compared to the NOEC value from 21 days chronic test to determine the conservativeness between the prediction and the experimental value. Water samples from 12 sampling points were collected from sampling sites and extracted by solid phase extraction method. The samples were then analysed by gas chromatography-mass spectrometry (GC-MS) to quantify the concentration of isoprothiolane detected in the samples. Isoprothiolane residue was detected in both the vegetative stage (maximum tillering) and ripening stage of paddy growth. The concentration of isoprothiolane residue found in the ripening stage was higher than in the vegetative stage. The highest amount of isoprothiolane residue detected was at 9.37 mg/L from water sample collected at sampling point 5 (S5) at the ripening stage. LC50 of isoprothiolane on M. lanchesteri was determined after 96 hours of exposure, interpreted by Probit analysis from SPSS software.
format	Thesis
qualification_level	Master's degree
author	Rahman, Muhammad Radzi Abd
author_facet	Rahman, Muhammad Radzi Abd
author_sort	Rahman, Muhammad Radzi Abd
title	Toxicity Study Of Isoprothiolane On Macrobrachium Lanchesteri In Surface Water Of Paddy Field Ecosystem
title_short	Toxicity Study Of Isoprothiolane On Macrobrachium Lanchesteri In Surface Water Of Paddy Field Ecosystem
title_full	Toxicity Study Of Isoprothiolane On Macrobrachium Lanchesteri In Surface Water Of Paddy Field Ecosystem
title_fullStr	Toxicity Study Of Isoprothiolane On Macrobrachium Lanchesteri In Surface Water Of Paddy Field Ecosystem
title_full_unstemmed	Toxicity Study Of Isoprothiolane On Macrobrachium Lanchesteri In Surface Water Of Paddy Field Ecosystem
title_sort	toxicity study of isoprothiolane on macrobrachium lanchesteri in surface water of paddy field ecosystem
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Awam
publishDate	2019
url	http://eprints.usm.my/49077/1/full%20thesis%20by%20RADZI%20cut.pdf
_version_	1747821979990228992

Toxicity Study Of Isoprothiolane On Macrobrachium Lanchesteri In Surface Water Of Paddy Field Ecosystem

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