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Ecology and Abundance of Oligochaetes as Indicators of Organic Pollution in an Urban Stream in Southern Nigeria

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Author(s): Francis O. Arimoro | Robert B. Ikomi | Chukwujindu M.A. Iwegbue

Journal: Pakistan Journal of Biological Sciences
ISSN 1028-8880

Volume: 10;
Issue: 3;
Start page: 446;
Date: 2007;
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Keywords: abattoir effluent | oligochaetes | Water quality | indicator

ABSTRACT
A study of the aquatic oligochaetes of an organically polluted segment of an urban stream in Southern Nigeria was carried out to assess the ecological impact of abattoir effluent. Three stations 1, 2 and 3 were selected from upstream of the site receiving abattoir effluent, the impacted site and its down stream, respectively. Among the water quality variables, conductivity, dissolved oxygen, BOD5, Nitrate-nitrogen, Phosphate-phosphorus and water hardness were significantly different (p

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