Bioassay of the Ultrastructural characteristics in the kidney and liver of the African catfish, Clariasgariepinus juveniles exposed to graded concentration of zinc

DOI: 10.22161/ijeab/1.3.22

Keyword: Bioassay, Clariasgariepinuskidney , liver Zinc.

Abstract: Bioassay in the structural deformation of the kidney and the liver of African catfish, Clariasgareipinus exposed to graded concentration of zinc was determine for a period of 96 hours. The stock solution was prepared with zinc and the fish juveniles were exposed to the following concentration in mg/L : 0.5, 0.75. 1.00, 1.25 and 1.50 with a control of 0.0mg/L where the zinc was not introduced. The kidney and the liver of the dead fish were dissected and subjected to histology test.The regression plot of the probit value transformed mortality against the concentration of zinc showed a strong relationship with the death of the fish exposed to the concentration of the metal with R2 value of 0.8725. Similarly the regression plot of the percentage mortality of the fish juveniles with zinc concentration indicate a very strong relationship with the toxicity of the metal that results to death of the fish at varied concentration with a R2 value of 0.99754. All the same probit transformed mortality and the log transformed concentration of zinc depict a very weak relationship between zinc toxicity and the lethality of the fish with a very low R2 value of 0.0873. All the same no death was observed in the control throughout the 96 hours period of the study while the lowest death of 15% was recorded in the 0.5mg/L and the highest of 60% in the 1.50mg/L concentration of zinc. The LC50 was determined to be 1.25mg/L during the study time. The result of the bioassay in the ultrastructural characteristics showed pathological lesion in the kidney and vacuolation of the hepatocytes of liver of the fish. The DO of the water was below the recommended level for the survival of the fish in the waters that the concentration of zinc was introduced and may cause distress to the fish. The fish showed erratic movement and distressful behavoiur where they were exposed to zinc and eventually the ones that could not tolerate the toxicity of the metal died. The study conclude that the fish should not be exposed to the elevated concentration of zinc as it is toxic and recommend that anthropogenic activities that release zinc into the environment should be controlled.

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Cite this Article:

Akaahan T . J., Akogwu S.A., Olabanji F . M. et al."Bioassay of the Ultrastructural characteristics in the kidney and liver of the African catfish, Clariasgariepinus juveniles exposed to graded concentration of zinc". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878),vol 1, no. 3, 2016, pp.448-456 AI Publications doi:10.22161/ijeab/1.3.22

Akaahan T . J., Akogwu S.A., Olabanji F . M., P.(2016).Bioassay of the Ultrastructural characteristics in the kidney and liver of the African catfish, Clariasgariepinus juveniles exposed to graded concentration of zinc. International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).1(3), 448-456.10.22161/ijeab/1.3.22

Akaahan T . J., Akogwu S.A., Olabanji F . M., P.(2016).Bioassay of the Ultrastructural characteristics in the kidney and liver of the African catfish, Clariasgariepinus juveniles exposed to graded concentration of zinc. International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).1(3), pp.448-456.

Akaahan T . J., Akogwu S.A., Olabanji F . M.. 2016."Bioassay of the Ultrastructural characteristics in the kidney and liver of the African catfish, Clariasgariepinus juveniles exposed to graded concentration of zinc". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).1(3):448-456.Doi:10.22161/ijeab/1.3.22

Akaahan T . J., Akogwu S.A., Olabanji F . M.."Bioassay of the Ultrastructural characteristics in the kidney and liver of the African catfish, Clariasgariepinus juveniles exposed to graded concentration of zinc", International Journal of Environment Agriculture and Biotechnology,vol.1,no. 3, pp.448-456,2016.

@article { akaahant.j.2016bioassay,
title={Bioassay of the Ultrastructural characteristics in the kidney and liver of the African catfish, Clariasgariepinus juveniles exposed to graded concentration of zinc},
author={Akaahan T . J., Akogwu S.A., Olabanji F . M. , R},
journal={International Journal of Environment Agriculture and Biotechnology},
volume={1},
year= {2016} ,
}