EFFECT OF TANK GEOMETRIC SHAPE RATIO ON PRODUCTIVITY OF RECIRCULATING AQUACULTURAL SYSTEM | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 14, Volume 33, Issue 3, July 2016, Page 985-998 PDF (698.61 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2016.97788 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Ahmed M. Ragab1; Abdel Ghany M. El-Gindy2; Yasser E. Arafa3; Ashraf Y. E L Dakar4 | ||||
| 1Demonstrator Aquac., Eng., Fac. Fish Resources, Suez Univ., Egypt | ||||
| 2Prof. of Agric. Eng., Fac. of Agric., Ain Shams Univ., Egypt | ||||
| 3Ass. Prof. of Agric. Eng., Fac. of Agric., Ain Shams Univ., Egypt | ||||
| 4Prof. of Aquac., Fac. Fish Resources, Suez Univ., Egypt | ||||
| Abstract | ||||
| The main aim of this work is to study the effect of tank 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 to 136 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 to 1.46, 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. | ||||
| Keywords | ||||
| circular tank; Tank geometry; Recirculating Aquaculture; Fish; Productivity | ||||
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