Impact of pollution on the hydrobiological features of the estuaries in Madras region.

Abstract

Due to the influx of large quantities of urban and industrial wastes. some of the cia1 aquaculture in the brackishwater areas coastal areas particularly adjoining the large in 'he coastal states Alagarswami, 1990 a cities of India are getting polluted (Qasim study on the sewage and industrial pollution) With the growing interest in prawnbased. impact has an important practical application. Not only they are important in the interest of water quality but also essential from the view point of product acceptability in the aquacul ture industry. Under these circumstances, it was felt worthwhile to examine the pollution impact on Adyar, Pulicat and Ennore estuaries around Madras. The Adyar estuary receives untreated city sewage and industrial wastes while Ennore estuary mainly wastes from petrochemical complex and thermal power plant. The lake Pulicat, which is situated in the outskirts of Madras city, is free from industrial or sewage pollution,