length and weight difference betweenO.

Exp. group	Mean initial weight (g)^a	Mean final weight (g)^b	SGR % g/dayc	Mean initial body length [32]^a	Mean final body length [32]^b	SGR % cm/day^c
A x A	1.29 ± 0.35	49.85 ± 19.46	2.44	3.02 ± 0.38	11.84 ± 1.36	0.91
N x N	1.44 ± 0.37	165.27 ± 34.80	3.16	3.16 ± 0.32	17.18 ± 1.25	1.27
N_F x N_F	1.47 ± 0.26	240.47 ± 32.24	3.47	2.98 ± 0.34	19.88 ± 1.31	1.27
N x A	1.78 ± 0.27	146.67 ± 35.73	2.94	3.14 ± 0.22	16.55 ± 1.30	1.11
N_F x A	1.47 ± 0.33	174.02 ± 31.09	3.18	2.97 ± 0.23	17.77 ± 1.29	1.19

^aMeasured at the beginning of the growth period (one month).
^bMeasured at the end of the growth period (six month).
^cCalculated over the growth period from one to six months.

Table 2: Comparison of specific growth rates (SGR%) based on body length and weight difference betweenO. aureus (A), O. niloticus (N), O.niloticus (NF) and hybrid tilapia over a six-month periods.

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