Date of Award


Document Type


Degree Name

Master of Science (MS)



First Advisor

Ibrahim Hassan Bela

Second Advisor

Dr. Khaled Abbas El Tarabily

Third Advisor

Fatima El-Nemaki


This thesis was carried out to investigate the impact of various Tilapia (Oreochromisniloticus) feeding frequency and stocking density on quality and quantity of organic lettuce that is produced in an aquaponic system, knowing that they affect the nutrient content in water. Business analysis through enterprise budget was developed considering different feeding frequency and stocking density of the fish to predict the business efficiency of the system, and the net incomes were as high as AED 34,394 and AED 46,637, respectively. On the other hand, lettuce was seeded in a culture raceway. The duration of the experiments was decided to be six months, which was divided into two parts to study each parameter, i.e. feeding frequency (Once, twice and three times per day) and stocking density (100,120,140 fishes per cubic meter). In parallel, the aquaponic system water quality (pH, temperature, total dissolved solids, dissolved Oxygen, total ammonia, nitrite, and nitrate) and water consumption were analyzed at specified intervals. Furthermore, fish and cultivated plant growth rate and total yield were analyzed at the first and last days of the experimental period. The purpose of that was to optimize the system feeding system and stocking from different approaches both agriculturally and economically. It was found that highest used feeding frequency and stocking density are recommended to achieve high profitability

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