Growth, survival rates and feed conversion ratio of white shrimp Penaeus indicus from the Red Sea reared in concrete raceways and circular fiberglass tanks

الملخص EN

Two methods of culture-concrete raceways and fiberglass tanks were evaluated to determine their effect on growth, survival rates and feed conversion ratio of white shrimp Penaeus indicus, for a 155-day culture period.

Each treatment was represented by three rep-lications.

Shrimps were fed three times a day at a rate of 3 to 8% of their total body weights.

Seawater and aeration were continuously dis-tributed to the culture facilities.

Shrimp growth was mostly similar in both treatments with an average weight gain of 20.

2 ± 0.

06 g in con-crete raceway tanks followed by the fiberglass tanks (20.

1 ± 0.

02 g).

Production rates of 0.

28 ± 0.

13 and 0.

21 ± 0.

09 kg / m3 were obtained in this study from the concrete raceway and fiberglass tanks, re-spectively.

Survival rate was significantly higher (P < 0.

05) in con-crete raceway tanks, (91.

33 %) than in fiberglass tanks (68.

67 %).

Sta-tistical analysis showed no significant difference between concrete raceway culture and the fiberglass tanks in terms of growth rates.

Sig-nificant differences were observed in terms of survival rate and feed conversion ratio in favor of concrete raceway tanks.

Suitable physico-chemical characters of culture waters coupled with high growth rates point that commercial culture of white shrimp Penaeus indicus in both culture facilities may be feasible.