Title: Soil and water characteristics and growth of Penaeus monodon fed with formulated feed in experimental tanks
Abstract: The changes in soil and water characteristics were studied in circular cement tanks stocked with three size groups of Penaeus monodon and fed with three grades of formulated feeds. The water quality parameters such as turbidity(3-16 NTU), ammonia(0.002-0.202 mg/1), nitrite(0.002-0.05 mg/1) and nitrate(0.002- 0.046 mg/1) and that of soil such as organic carbon(0.15-0.39%), total nitrogen( 0.014-0.059%) and redox potential(-40 to -190 mV) were higher in all size group shrimps than the control group. The levels of ammonia, nitrite and nitrate in water were high during second and third week and the organic carbon and total N in soil were high after sixth week. All these parameters were higher with finisher feed treatment followed by grower feed treatment. The study clearly shows that there is a sharp increase in ammonia in the water after two weeks due to excretion by shrimps which later effectively gets converted into nitrite and nitrate by nitrogen converting bacteria. The rise in organic carbon and total nitrogen suggests the active role of bacteria in soil water interface. The steady increase in the redox potential underlines the increasing load of organic substances due to uneaten feed and faecal accumulation. Growth and FOR in all the three groups showed progressive trend which were comparable to the results obtained in other studies.
Publication Year: 2001
Publication Date: 2001-01-01
Language: en
Type: article
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Cited By Count: 7
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