Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring
Rapid industrialization and urbanization has led to increasing input of chemical contaminants into the aquatic environment of Malaysia. Despite the threat civilization poses to the biota, there are still very few relevant studies on ecotoxicological testing of river ecosystems. To overcome this know...
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Wiley Online Library
2012
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| Online Access: | http://ir.unimas.my/id/eprint/9877/ http://ir.unimas.my/id/eprint/9877/1/GENOTOXICITY%20IN%20CHIRONOMUS%20KIIENSIS%20%28CHIRONOMIDAE%20DIPTERA%29%20AFTER%20%28abstract%29.pdf |
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| author | Salman A., Al-Shami Che Salmah, Md Rawi Siti Aziziah, Mohd Nor mohd Nor Abu Hassan, Ahmad Nur Adibah, Mohd Ishadi Dieng, Hamady |
| author_facet | Salman A., Al-Shami Che Salmah, Md Rawi Siti Aziziah, Mohd Nor mohd Nor Abu Hassan, Ahmad Nur Adibah, Mohd Ishadi Dieng, Hamady |
| author_sort | Salman A., Al-Shami |
| building | UNIMAS Institutional Repository |
| collection | Online Access |
| description | Rapid industrialization and urbanization has led to increasing input of chemical contaminants into the aquatic environment of Malaysia. Despite the threat civilization poses to the biota, there are still very few relevant studies on ecotoxicological testing of river ecosystems. To overcome this knowledge gap,we examined lethal and genotoxic effects of sediments fromdifferent rivers of the northernMalaysia against Chironomus kiiensis, a group well represented in the aquatic fauna of this region.We exposed the larvae to sediments from Selama River (SR), Permatang Rawa River (PRR) and Kilang Ubi River (KUR) at various durations (0, 6, 12, 24 and 48 h). The larval mortality was monitored, whereas DNA damage in survivors’ cells was determined using the comet assay. Pollution level indexed by the amounts of heavy metals and other organic contaminants
in the sediment showed progressive increases from SR to PRR to KUR. Highly polluted sediments (PRR to KUR) were detrimental to C. kiiensis larvae, most of which did not survive following exposure for long periods. DNA analyses revealed greater damages in nuclei derived from larvae
maintained on polluted sediments, in particular, those from KUR. The effects on the genomic material of C. kiiensis larvae occurred in a timedependent manner, with damage level increasing as exposure time progressed. Our results highlight the genotoxic properties of polluted sediments.More importantly, this study showed that C. kiiensis larvae could respond to different levels of pollution with respect to exposure time. It is concluded that C. kiiensis larvae is a potential candidate for river ecotoxicological monitoring. |
| first_indexed | 2025-11-15T06:27:13Z |
| format | Article |
| id | unimas-9877 |
| institution | Universiti Malaysia Sarawak |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T06:27:13Z |
| publishDate | 2012 |
| publisher | Wiley Online Library |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | unimas-98772015-12-03T03:31:18Z http://ir.unimas.my/id/eprint/9877/ Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring Salman A., Al-Shami Che Salmah, Md Rawi Siti Aziziah, Mohd Nor mohd Nor Abu Hassan, Ahmad Nur Adibah, Mohd Ishadi Dieng, Hamady GE Environmental Sciences QD Chemistry Rapid industrialization and urbanization has led to increasing input of chemical contaminants into the aquatic environment of Malaysia. Despite the threat civilization poses to the biota, there are still very few relevant studies on ecotoxicological testing of river ecosystems. To overcome this knowledge gap,we examined lethal and genotoxic effects of sediments fromdifferent rivers of the northernMalaysia against Chironomus kiiensis, a group well represented in the aquatic fauna of this region.We exposed the larvae to sediments from Selama River (SR), Permatang Rawa River (PRR) and Kilang Ubi River (KUR) at various durations (0, 6, 12, 24 and 48 h). The larval mortality was monitored, whereas DNA damage in survivors’ cells was determined using the comet assay. Pollution level indexed by the amounts of heavy metals and other organic contaminants in the sediment showed progressive increases from SR to PRR to KUR. Highly polluted sediments (PRR to KUR) were detrimental to C. kiiensis larvae, most of which did not survive following exposure for long periods. DNA analyses revealed greater damages in nuclei derived from larvae maintained on polluted sediments, in particular, those from KUR. The effects on the genomic material of C. kiiensis larvae occurred in a timedependent manner, with damage level increasing as exposure time progressed. Our results highlight the genotoxic properties of polluted sediments.More importantly, this study showed that C. kiiensis larvae could respond to different levels of pollution with respect to exposure time. It is concluded that C. kiiensis larvae is a potential candidate for river ecotoxicological monitoring. Wiley Online Library 2012 Article NonPeerReviewed text en http://ir.unimas.my/id/eprint/9877/1/GENOTOXICITY%20IN%20CHIRONOMUS%20KIIENSIS%20%28CHIRONOMIDAE%20DIPTERA%29%20AFTER%20%28abstract%29.pdf Salman A., Al-Shami and Che Salmah, Md Rawi and Siti Aziziah, Mohd Nor mohd Nor and Abu Hassan, Ahmad and Nur Adibah, Mohd Ishadi and Dieng, Hamady (2012) Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring. River Research and Applications, 29 (9). pp. 1195-1204. ISSN 1535-1467 http://www.researchgate.net/publication/8507214_Genotoxicity_of_field-collected_inter-tidal_sediments_from_Cork_Harbor_Ireland_to_juvenile_turbot_%28Scophthalmus_maximus_L.%29_as_measured_by_the_Comet_assay 10.1002/rra.2594 |
| spellingShingle | GE Environmental Sciences QD Chemistry Salman A., Al-Shami Che Salmah, Md Rawi Siti Aziziah, Mohd Nor mohd Nor Abu Hassan, Ahmad Nur Adibah, Mohd Ishadi Dieng, Hamady Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring |
| title | Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring |
| title_full | Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring |
| title_fullStr | Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring |
| title_full_unstemmed | Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring |
| title_short | Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring |
| title_sort | genotoxicity in chironomus kiiensis (chironomidae: diptera) after exposure to polluted sediments from rivers of north peninsular malaysia: implication for ecotoxicological monitoring |
| topic | GE Environmental Sciences QD Chemistry |
| url | http://ir.unimas.my/id/eprint/9877/ http://ir.unimas.my/id/eprint/9877/ http://ir.unimas.my/id/eprint/9877/ http://ir.unimas.my/id/eprint/9877/1/GENOTOXICITY%20IN%20CHIRONOMUS%20KIIENSIS%20%28CHIRONOMIDAE%20DIPTERA%29%20AFTER%20%28abstract%29.pdf |