Desmoscaris tripsinosa and Palaemonetes africanus Responses to Concentrations of Neatex and Norust CR486 in Sediment
The assessment of water and sediment quality from chemical pollutants in the Nigerian Niger Delta were conducted using bioindicators (Desmoscaris tripsinosa and Palaemonetes africanus). The Organization for Economic Cooperation and Development (OECD) (2004), No.218 direct sediment toxicity assessmen...
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description | The assessment of water and sediment quality from chemical pollutants in the Nigerian Niger Delta were conducted using bioindicators (Desmoscaris tripsinosa and Palaemonetes africanus). The Organization for Economic Cooperation and Development (OECD) (2004), No.218 direct sediment toxicity assessment was employed. Shrimp were exposed to sediments treated with Neatex (liquid detergent) and Norust CR 486 (corrosion inhibitor) at concentrations of 31.25, 62.5, 125, 250 and 500 mg/kg. Percentage mortality was measured as the ecological endpoint. Mean % mortality and estimated lethal concentration LC50 values varied with species type, concentration and exposure duration. Observed % mean mortality of the test organisms in both chemicals were significantly different from that of the control test suggesting that mortality may be induced by the effect of the chemicals. LC50s were significantly different for both chemicals at p < 0.05, t = 6.06 (fresh water) and p < 0.05, t = 12.34 (brackish). The values from this study are an indication that the chemicals have the potential to cause acute lethal toxicity. It is a prediction of likely adverse effects on shrimp populations in benthic sediment of the Niger Delta ecological zone. Consequently, there is a great need to protect some of the more sensitive invertebrates representing the major proportion of the diet of many other species. |
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I. N. ; Ogeleka, D. F. ; Okieimen, F. E.</creator><creatorcontrib>Ezemonye, L. I. N. ; Ogeleka, D. F. ; Okieimen, F. E.</creatorcontrib><description>The assessment of water and sediment quality from chemical pollutants in the Nigerian Niger Delta were conducted using bioindicators (Desmoscaris tripsinosa and Palaemonetes africanus). The Organization for Economic Cooperation and Development (OECD) (2004), No.218 direct sediment toxicity assessment was employed. Shrimp were exposed to sediments treated with Neatex (liquid detergent) and Norust CR 486 (corrosion inhibitor) at concentrations of 31.25, 62.5, 125, 250 and 500 mg/kg. Percentage mortality was measured as the ecological endpoint. Mean % mortality and estimated lethal concentration LC50 values varied with species type, concentration and exposure duration. Observed % mean mortality of the test organisms in both chemicals were significantly different from that of the control test suggesting that mortality may be induced by the effect of the chemicals. LC50s were significantly different for both chemicals at p < 0.05, t = 6.06 (fresh water) and p < 0.05, t = 12.34 (brackish). The values from this study are an indication that the chemicals have the potential to cause acute lethal toxicity. It is a prediction of likely adverse effects on shrimp populations in benthic sediment of the Niger Delta ecological zone. 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I. N.</creatorcontrib><creatorcontrib>Ogeleka, D. F.</creatorcontrib><creatorcontrib>Okieimen, F. E.</creatorcontrib><title>Desmoscaris tripsinosa and Palaemonetes africanus Responses to Concentrations of Neatex and Norust CR486 in Sediment</title><title>Journal of surfactants and detergents</title><description>The assessment of water and sediment quality from chemical pollutants in the Nigerian Niger Delta were conducted using bioindicators (Desmoscaris tripsinosa and Palaemonetes africanus). The Organization for Economic Cooperation and Development (OECD) (2004), No.218 direct sediment toxicity assessment was employed. Shrimp were exposed to sediments treated with Neatex (liquid detergent) and Norust CR 486 (corrosion inhibitor) at concentrations of 31.25, 62.5, 125, 250 and 500 mg/kg. Percentage mortality was measured as the ecological endpoint. Mean % mortality and estimated lethal concentration LC50 values varied with species type, concentration and exposure duration. Observed % mean mortality of the test organisms in both chemicals were significantly different from that of the control test suggesting that mortality may be induced by the effect of the chemicals. LC50s were significantly different for both chemicals at p < 0.05, t = 6.06 (fresh water) and p < 0.05, t = 12.34 (brackish). The values from this study are an indication that the chemicals have the potential to cause acute lethal toxicity. It is a prediction of likely adverse effects on shrimp populations in benthic sediment of the Niger Delta ecological zone. 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I. N.</au><au>Ogeleka, D. F.</au><au>Okieimen, F. E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Desmoscaris tripsinosa and Palaemonetes africanus Responses to Concentrations of Neatex and Norust CR486 in Sediment</atitle><jtitle>Journal of surfactants and detergents</jtitle><date>2007-12</date><risdate>2007</risdate><volume>10</volume><issue>4</issue><spage>301</spage><epage>308</epage><pages>301-308</pages><issn>1097-3958</issn><eissn>1558-9293</eissn><abstract>The assessment of water and sediment quality from chemical pollutants in the Nigerian Niger Delta were conducted using bioindicators (Desmoscaris tripsinosa and Palaemonetes africanus). The Organization for Economic Cooperation and Development (OECD) (2004), No.218 direct sediment toxicity assessment was employed. Shrimp were exposed to sediments treated with Neatex (liquid detergent) and Norust CR 486 (corrosion inhibitor) at concentrations of 31.25, 62.5, 125, 250 and 500 mg/kg. Percentage mortality was measured as the ecological endpoint. Mean % mortality and estimated lethal concentration LC50 values varied with species type, concentration and exposure duration. Observed % mean mortality of the test organisms in both chemicals were significantly different from that of the control test suggesting that mortality may be induced by the effect of the chemicals. LC50s were significantly different for both chemicals at p < 0.05, t = 6.06 (fresh water) and p < 0.05, t = 12.34 (brackish). The values from this study are an indication that the chemicals have the potential to cause acute lethal toxicity. It is a prediction of likely adverse effects on shrimp populations in benthic sediment of the Niger Delta ecological zone. 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subjects | Arthropod (shrimp) Chemical pollutants Chemical pollution Chemicals Desmoscaris tripsinosa Detergents Fresh water Human subjects Indicator species Mortality Oil spills Organic chemicals Palaemonetes africanus Sediment Sediments Studies Test organisms Toxicity Toxicity test |
title | Desmoscaris tripsinosa and Palaemonetes africanus Responses to Concentrations of Neatex and Norust CR486 in Sediment |
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