EFFECT OF DIETARY CRUDE PROTEIN LEVEL AND STOCKING RATE OF MONOSEX ALL MALE NILE TILAPIA REARED UNDER RECIRCULATING AQUACULTURE SYSTEM

Abdel-Hakim, N. F.; Lashin, M. E.; Alazab, A. A.; Radwan, I. A.; Abdelhamid, A. F.B.

doi:10.21608/jappmu.2016.48254

EFFECT OF DIETARY CRUDE PROTEIN LEVEL AND STOCKING RATE OF MONOSEX ALL MALE NILE TILAPIA REARED UNDER RECIRCULATING AQUACULTURE SYSTEM

Document Type : Original Article

Authors

¹ Anim. Prod. Dept., Fac. of Agric., Al-Azhar Univ., Cairo, Egypt.

² Egyptian Aquaculture Centre, Kafr El-Sheikh, Egypt.

10.21608/jappmu.2016.48254

Abstract

To recognize the best dietary crude protein (CP) percentage and stocking rate (SR) of monosex Nile tilapia under recirculating aquaculture system, two CP levels (25 & 32 %) and two SR (140 & 210 / m³) were used for 168 days. The obtained results revealed that feeding fish 32 % CP-diet at SR of 140 fish / m³ resulted in the best final bodyweight, average daily gain, specific growth rate, feed conversion, survival, energy utilization, and return. Whereas, 32 % CP at 210 fish / m³ was responsible for best protein productive value, body weight (with lowest inedible parts percentage), carcass protein percent (with lowest fat %), and productivity / m³. So, it could recommend feeding Nile tilapia (under similar conditions to those of the present experiment) 32 % CP-diet and stocking rate of 140 fish / m³.

Keywords