TY  - SER
AU  - Ragab,Ahmed M.
AU  - El-Gindy,Abdel Ghany M.
AU  - Arafa,Yasser E.
AU  - EL Dakar,Ashraf Y.
TI  - Effect of tank geometric shape ratio on productivity of Recirculating Aquaculturalsystem
KW  - Aquaculture
KW  - Water
KW  - Fishes
KW  - Breeding
N1  - Includes bibliographic reference
N2  - The main aim of this work is to study the effect of lank diameter depth ratio on the water quality and productivity of recirculating aquacultural system to reach the optimum tank diameter: water depth ratio. The obtained results indicated that the mean weight of fish increased from 18 to 148.18 to136 and 18 to 114 g after 14 weeks with the diameter depth ratios 4. 6.4 and 8. respectively. The average weight gain of fish increased from 2 to 21. 8 to 13 and 3 to 6 g after 14 weeks with the diameter depth ratios 4. 6.4 and 3. respectively. The specific growth rate ranged from 0.99 to 6.00, 0.39 to 5.25 and 0.17 to 5.10 % day-1 at 4. 6.4 and 8 diameter depth ratio. The feed conversion rate ranged from 0.68 to 
3.53. 0.88 to 10.91 and 0.93 to 18.51 kg feed/kg fish at 4. 6.4 and 8 diameter depth ratio. The feed efficiency ranged from 0.28 to1.46. 0.11 to 1.13 and 0.05 to 1.39 at 4. 6.4 and 8 diameter depth ratio. The mean daily mortality rates were 0.048. 0.058 and 0.064 % at 4. 6.4 and 8 diameter depth ratio. respectively
UR  - http://nile.enal.sci.eg/EALE/2016/MJAE/3316/3/985.pdf
ER  -