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논문 기본 정보

자료유형
학술저널
저자정보
Moshood Keke Mustapha (University of Ilorin)
저널정보
한국독성학회 Toxicological Research Toxicological Research Vol.33 No.2
발행연도
2017.4
수록면
119 - 124 (6page)

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Hexavalent chromium is a bio accumulative toxic metal in water and fish. It enters aquaculture ponds mainly through anthropogenic sources. Hexavalent chromium concentrations and its effects on the morphology and behavior of Clarias gariepinus were investigated from four aquaculture ponds for 12 weeks. Chromium was measured using diphenyl carbohdrazide method; alkalinity and hardness were measured using colometric method and analyzed with Bench Photometer. Temperature and pH were measured using pH/EC/TDS/Temp combined tester. Temporal and spatial replications of samples were done with triplicates morphological and behavioural effects of the metal on fish were observed visually. Chromium ranged from no detection to 0.05 mg/L, alkalinity 105 to 245 mg/L, hardness 80 to 165 mg/L, pH 6.35 to 8.03 and temperature 29.1 to 35.9oC. Trend in the chromium concentrations in the ponds is natural > earthen > concrete > collapsible. There was a significant difference (P < 0.05) in chromium, alkalinity, water hardness, pH and temperature among the four ponds. Significant positive correlation also existed between alkalinity, water hardness, pH, with chromium. Morphological and behavioural changes observed in the fish include irregular swimming, frequent coming to the surface, dark body colouration, mucous secretion on the body, erosion of gill epithelium, fin disintegration, abdominal distension and lethargy. High chromium concentration in natural pond was due to anthropogenic run-off of materials in to the pond. Acidic pH, low alkalinity, low water hardness also contributed to the high chromium concentration. Morphological and behavioural changes observed were attributed to the high concentrations, toxicity and bio accumulative effect of the metal. Toxicity of chromium to fish in aquaculture could threaten food security. Watershed best management practices and remediation could be adopted to reduce the effects of toxicity of chromium on pond water quality, fish flesh quality and fish welfare.
#Chromium #Toxicity #Ponds #Aquaculture #Anthropogenic #Bioaccumulation

목차

INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
REFERENCES

참고문헌 (23)

참고문헌 신청
Doudoroff, P / 1953 / Critical review of literature on the toxicity of industrial wastes and their components to fish. II. The metals, as salts / Sewage Ind. Waste 25:802~839 google schola Eisler, R / 1986 / Chromium hazards to fish, wildlife and invertebrates: a synoptic review google schola Velma, V / 2009 / Ecotoxicology of hexavalent chromium in freshwater fish: a critical review / Rev. Environ. Health 24:129~145 google schola Pawlisz, A.V / 1997 / Canadian water quality guidelines for chromium / Environ. Toxicol 12:123~183 google schola Canadian Council of Ministers of the Environment / 1999 / Canadian water quality guidelines for the protection of aquatic life: chromium — hexavalent chromium and trivalent chromium in Canadian environmental quality guidelines / Canadian Council of Ministers of the Environment :1~4 google schola

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UCI(KEPA) : I410-ECN-0101-2017-513-002410030