Water and soil parameters analyses
Different water quality parameters like temperature, dissolved oxygen and pH were monitored twice daily (06-00 and 16-00 h) while salinity and transparency were monitored once a week (11-00 h) in situ using the multi-parameter device YSI, MP556 mode and Secchi disc. Other nutrients (NH4-N, NO2-N, NO3-N, PO4-P) and total alkalinity were monitored monthly during the whole production period (Boyd and Tucker 1992: APHA 1995). Soil samples from the bottom sediments of the experimental ponds were collected using Ekman’s dredger at monthly intervals throughout the culture period. Soil pH, redox potential, organic carbon and organic matter were measured following standard methods (Boyd and Tucker 1992; Boyd 1995).
Water and soil parameters analysesDifferent water quality parameters like temperature, dissolved oxygen and pH were monitored twice daily (06-00 and 16-00 h) while salinity and transparency were monitored once a week (11-00 h) in situ using the multi-parameter device YSI, MP556 mode and Secchi disc. Other nutrients (NH4-N, NO2-N, NO3-N, PO4-P) and total alkalinity were monitored monthly during the whole production period (Boyd and Tucker 1992: APHA 1995). Soil samples from the bottom sediments of the experimental ponds were collected using Ekman’s dredger at monthly intervals throughout the culture period. Soil pH, redox potential, organic carbon and organic matter were measured following standard methods (Boyd and Tucker 1992; Boyd 1995).
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