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Subject: Aquatic Animal Health Management × Author: ABDUL RAHIMAN, A., × Start date: 2006 ×
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    ThesisItemOpen Access
    WATER QUALITY AND SOIL DYNAMICS OF SELECTED SHRIMP FARMS OF ANKOLA, UTTARA KANNADA DISTRICT
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) ABDUL RAHIMAN, A.,; CHANDRAKANTH LINGDAL
    The present study was carried out to investigate the water, soil quality, plankton and health status of eight selected Litopenaeus vannamei shrimp ponds in Ankola, Uttara Kannada district of Karnataka over a culture period. Physico-chemical parameters of soil and water were analysed by standard methods. The study was conducted during the period of March-June (P1 and P2); July-October (P3, P4, P5, P6 and P7); September-November (P8). The results showed that some parameters with slight deviation compared with the optimal water quality values. Soil quality and pond bottom soil processes, as well as the association between ponds soil and water, are important for fish or shrimp growth. Sediment and water quality play an important part in enhancing the pond's overall production. The water quality parameters namely temperature, pH, alkalinity, salinity, DO, BOD, TSS, TDS, NH3-N, NO2-N, NO3-N, PO4-P, SiO3-Si were found to vary from 27-35° C, 6.8- 9.3, 22-118 ppm, 0-35 PSU, 4.07-13.83 mg/l, 0.81-13.83 mg/l, 0.006-0.21 g/l, 0.15-67.04 g/l, 0.12-56.01 μg-at/l, 0.09-50.09 μg-at/l, 0.06-66.15 μg-at/l, 0.17-13.14 μg-at/l, 0.83-231.23 μg-at/l respectively. The soil parameters comprising of temperature, pH, Organic carbon and texture ranged from 27.4-35.5° C, 4.3-9.0, 0.07-1.38%, Sand: 48.41- 96.26%; Clay: 0.3-2.45%; Silt: 3.14-51.24% respectively. Zooplankton number varied from 1000-184000 Nos/m³. Results of health status analysis showed EHP positive in P3, P4 and P7 due to poor pre-stocking management practices. By adopting better management practices, the production could be increased. Thus, with the ideal range of soil and water parameters, there exists a great potential for brackishwater shrimp farming in the Uttara Kannada district of Karnataka.