title: Evaluation of genetic toxicity caused by acid mine drainage of coal mines on fish fauna of Simsang River, Garohills, Meghalaya, India.
abstract: Fishery ecology of the Simsang River, Meghalaya is being threatened by large scale environmental degradation due to acid mine drainage (AMD) of coal mines. In the present paper, effort has been made to evaluate the genotoxicity caused due to AMD of coal mines on Channa punctata under laboratory condition through comet assay, micronucleus and chromosome aberration tests. Water samples were collected seasonally from affected and unaffected sites of the River and physico-chemical quality of water indicated low pH (4.6), high concentration of sulphates (270mgL(-1)) and iron (7.2mgL(-1)) beyond permissible limits. Polycyclic aromatic hydrocarbon (PAH) showed highest concentration of 4-ring PAH and Benzo[a]anthracene was the most important pollutant in the water collected from affected sites. The highest and the lowest mean concentrations of PAHs were estimated in monsoon and winter season, respectively. The index of DNA damage assessed by comet assay, micronucleus and chromosome aberration tests demonstrated significant differences season wise in different sampling sites. Frequency of DNA-damaged cells was found highest in the water samples collected from affected site in monsoon season.
authors.affiliation: Department of Zoology, Gauhati University, Guwahati 781014, Assam, India.
authors.forename: B
authors.initials: B
authors.lastname: Talukdar
authors.affiliation: Department of Zoology, Gauhati University, Guwahati 781014, Assam, India.
authors.forename: H K
authors.initials: HK
authors.lastname: Kalita
authors.affiliation: Department of Zoology, Gauhati University, Guwahati 781014, Assam, India.
authors.forename: R A
authors.initials: RA
authors.lastname: Baishya
authors.affiliation: Department of Zoology, Gauhati University, Guwahati 781014, Assam, India.
authors.forename: S
authors.initials: S
authors.lastname: Basumatary
authors.affiliation: Department of Zoology, Gauhati University, Guwahati 781014, Assam, India. Electronic address: sarma_dandadhar@yahoo.com.
authors.forename: D
authors.initials: D
authors.lastname: Sarma
mesh_terms: D000143:Acids / Q000633:toxicity*; D000818:Animals; D001551:Benz(a)Anthracenes / Q000032:analysis / Q000633:toxicity; D003032:Coal Mining; D020552:Comet Assay; D004249:DNA Damage; D004784:Environmental Monitoring; D005399:Fishes; D006863:Hydrogen-Ion Concentration; D007194:India; D007220:Industrial Waste; D007501:Iron / Q000032:analysis; D015162:Micronucleus Tests; D045483:Rivers / Q000737:chemistry*; D012621:Seasons; D013431:Sulfates / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity*
chemical_list: D000143:Acids; D001551:Benz(a)Anthracenes; D007220:Industrial Waste; D013431:Sulfates; D014874:Water Pollutants, Chemical; C030935:benz(a)anthracene; D007501:Iron
keywords: AMD; Chromosome aberration; Coal mines; Comet assay; Genotoxicity; Micronucleus