The effect of supplementary feeding of market carp by cereal feeds on water quality

The purpose of this thesis was monitoring the impact of supplementary feeding to selected parameters of water quality (temperature, oxygen, pH, alkalinity, conductivity, turbidity, total suspended solids, chlorophyll a, CODCr, BOD5, TP, P PO43-, TN, N NH4+, N NO3). This experiment took place in storage ponds in Třeboň for 120 days. For the supplementary feeding were used nonmodified wheat, thermally wheat and thermally and pressed wheat. There were chosen 2 storage ponds for every group. Fish were fed 3 times a week. For comparison of results it was deployed a.k.a control where fish were dependent on natural food. It was taken total 12 samples in which were determined chemical and physical properties of water. Only one statistic (p < 0,05) difference was recorded in concentration of oxygen in storage ponds, where fish were fed by thermally and pressed wheat (5,79 + - 1,38 mg.l-1) in comparison with control (7,00 + - 1,73 mg.l-1). Other parameters did not exhibit significant changes among the monitored groups (p > 0,05)