Abstract

The present study was carried out at "Shrimp Culture Pilot Project", Chandipur coast of Orissa, India, during 1995-1996 to study the role of water transparency on water quality and growth of Penaeus monodon under semi-intensive culture system. It was observed that satisfactory range of average daily growth (ADG) of P. monodon achieved when transparency ranged between 29-35 cm in winter and 30-45 cm in summer. Influence of water transparency on various stages of growth was highly significant (P < 0.01) under semi-intensive culture system. Irrespective of stocking density, high growth rate was mostly obtained during 60-100 days of culture when transparency ranged between 37 ± 8 cm. Growth rate was low at high and low transparency probably due to low nutrient content and high organic load with maximum daily fluctuation of pH (>1.0) and dissolved oxygen (8.1-10.6 mg/1), respectively.

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