Construction and environmental control of a small-scale fish tank for breeding and producing freshwater fish

الملخص EN

Two small-scale designed fish tanks (round and square) were constructed for breeding and producing freshwater fish.

To control environment, experiments were carried out to study the effect of some different parameters on the performance of the two designed tanks during aquaculture of Nile tilapia (Oreochromis niloticus).

Performance was experimentally investigated as a function of change in tank shape, fish stocking density, with and without biological filter, and aeration regime in terms of ammonia concentration, dissolved oxygen, biomass, dead fish, body weight gain, specific growth ratio, relative growth ratio and required power.

The experimental results reveal that biomass vlaues of 13.53 kg/m3 and 12.68 kg/m3 were maximum while dead fish values of 3 fish/m3 and 9 fish/m3 were optimum under the following conditions: use of the round and square tanks, respectively adjust air compressor with inter-holes distance of 150 mm as an aeration regime and adjust stocking density at 200 fish/m3 .