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Adakole, J. A.
- Changes in some Haematological Parameters of the African Catfish (Clarias gariepinus) Exposed to a Metal Finishing Company Effluent
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PDF Views:275
Authors
Affiliations
1 Department of Biological Sciences, Ahmadu Bello University, Zaria, NG
1 Department of Biological Sciences, Ahmadu Bello University, Zaria, NG
Source
Indian Journal of Science and Technology, Vol 5, No 4 (2012), Pagination: 2510-2514Abstract
Metal company effluent toxicity in Clarias gariepinus, was investigated by the hematological parameters after long-term (8 weeks) exposure to various effluent sub-lethal concentrations (3.5397, 7.0794 and 14.1589ml/L effluent). Test groups were set up in duplicates for each concentration, plus the control group. Blood samples were collected from four individuals bi-weekly for each concentration at 0, 2, 4, 6, and 8th weeks of exposure. Most of the investigated physico-chemical characteristics of the effluent showed deviation from the FEPA (1991) limits. The effluent caused a mean decrease of haematocrit (30.02 ± 1.21% to 24.75 ± 4.57%), haemoglobin (10.02 ± 0..95g/100ml to 8.60 ± 1.34g/100ml), mean corpuscular haemoglobin (74.00 ± 8.64pg/cell to 30.45 ±12.75Pg/cell). Erythrocytes increased from 135.08 ± 10.55 to 367.42 ± 94.88 and then decreased to 219.07 ± 48.66 × 103 cells/mm3. Leucocytes also followed a similar pattern. The MCV and MCH also varied significantly (P > 0.05). The leucocytes peak (103.0 × 103 cells/mm3) was recorded in week 4, in fish from the highest concentration tank. The study suggested that the metalfinishing effluent has strong influence on the hematological parameters in C.gariepinus.Keywords
Industrial Effluent, FEPA, Hematology, FISH, Clarias gariepinusFull Text
References
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- Ecotoxicity of Leaf Extracts of Azadirachta indica on Chironomids Larvae
Abstract Views :470 |
PDF Views:141
Authors
J. A. Adakole
1,
S. Ogwu
1
Affiliations
1 Department of Biological Sciences, Ahmadu Bello University, Zaria, NG
1 Department of Biological Sciences, Ahmadu Bello University, Zaria, NG
Source
Indian Journal of Science and Technology, Vol 5, No 4 (2012), Pagination: 2515-2519Abstract
The present study was designed to evaluate acute ecotoxicity of aqueous and ethanolic leaf extracts of Azadirachta indica on Chironomus spp. Exposure of chironomd larvae to the crude aqueous extract (0.0 [control], 25.00, 50.00, 75.00, 150.00&200.00 mg/L) and ethanolic (0.0 [control], 6.00, 12.00, 25.00, 50.00&100.00 mg/L) concentrations resulted in LC50 of 68.28mg/L and of 6.65mg/L respectively. Other toxic response by the larvae includes avoidance of sediment, impregnation of some segments with dark substances and bleaching/loss of respiratory pigments. Comparatively, mortality rate and other toxic responses was more in the ethanolic extract than in the aqueous extract test tanks. Impregnation of some larvae segments with dark substances suggests that feeding activity was going on during the toxicity test period and mortality of the larvae was partly due to contact with the polluted sediment and ingestion of contaminated particles of the sediment.Keywords
Ecotoxicity, Azadirachta indica, Neem, Chironomus Larvae, EcotoxicityFull Text
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