Evaluation of use effective microorganisms (EM) with different feeding strategies on growth performance, body chemical composition and economic efficiency of monosex Nile tilapia Oreochromis niloticus juveniles

Special Issue - Ecological intensification: A new paragon for sustainable aquaculture

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Table 5

Effect of interaction between EM and the feeding regime on growth performance of tilapia juveniles.

Parameters^†	Treatments^‡						LSD^*

	A 1	A2	B1	B2	C1	C2
W₁, g	3.85	3.85	3.85	3.85	3.85	3.85	–
L₂, cm	10.75 ± 0.40	10.35 ± 0.01	10.57 ± 0.13	10.13 ± 0.03	10.37 ± 0.31	10.81 ± 0.02	0.740
W₂, g	22.69^a ± 0.01	19.25^b ± 0.84	21.93^a ± 0.21	20.83^ab ± 0.66	22.62^a ± 0.87	22.58^a ± 0.40	2.050
WG, g	18.84^a ± 0.01	15.40^b ± 0.84	18.08^a ± 0.21	16.97^ab ± 0.66	18.77^a ± 0.87	18.73^a ± 0.40	2.050
ADG, g day⁻¹	0.370^a ± 0.001	0.302^b ± 0.016	0.354^a ± 0.004	0.332^ab ± 0.010	0.367^a ± 0.020	0.367^a ± 0.010	0.040
RGR, %	489.48^a ± 0.10	400.13^b ± 21.50	469.16^a ± 5.45	440.91^ab ± 17.30	487.53^a ± 22.60	486.49^a ± 10.10	53.280
SGR, %day⁻¹	3.50^a ± 0.00	3.15^b ± 0.08	3.41^a ± 0.02	3.31^ab ± 0.0600	3.50^a ± 0.07	3.50^a ± 0.03	0.190
CF, %	1.82 ± 0.08	1.73 ± 0.07	1.85 ± 0.05	2 ± 0.08	2.04 ± 0.26	1.78 ± 0.04	0.430
SR, %	89.99 ± 4.44	96.60 ± 3.40	98.88 ± 1.11	93.88 ± 6.11	94.44 ± 5.56	99.44 ± 0.56	14.210
HSI, %	3.96 ± 0.04	5.18 ± 0.62	4.38 ± 0.05	6.25 ± 0.20	4.83 ± 0.70	4.23 ± 1.04	2.000
VSI, %	11.54 ± 0.10	7.75 ± 0.05	9.83 ± 0.05	9.83 ± 0.29	8.98 ± 1.81	10.33 ± 2.29	4.140
FI, g fish⁻¹	21.49 ± 0.74	18.64 ± 0.78	20.22 ± 0.60	19.17 ± 1.32	20.65 ± 1.23	19.62 ± 0.43	3.160
FCR	1.14 ± 0.04	1.21 ± 0.01	1.17 ± 0.02	1.13 ± 0.12	1.09 ± 0.01	1.06 ± 0.02	0.188
PER	2.48 ± 0.03	2.28 ± 0.03	2.5 ± 0.05	2.49 ± 0.27	2.54 ± 0.04	2.62 ± 0.04	0.415
EER	0.041 ± 0.001	0.038 ± 0.001	0.040 ± 0.001	0.040 ± 0.004	0.041 ± 0.001	0.042 ± 0.001	0.006

Values are means ± S.E. of triplicate groups of three tanks. (a and b) Average in the same row having different superscripts significantly different at (P ≤ 0.05).

*Least significant difference.

^†Weight gain (WG), average daily gain (ADG), Relative growth rate (RGR), specific growth rate (SGR), condition factor (CF), survival rate (SR), Hepatosomatic index (HSI), Viscerosomatic index (VSI) Feed intake g/ fish (FI), feed conversion ratio (FCR), protein efficiency ratio (PER) and energy efficiency ratio (EER) ‡, A1: fish fed a control diet with 2/3 of amount daily meal in the morning, A2: fish fed a control diet with 2/3 of amount daily meal in the afternoon, B1 fish fed dietary 2% EM supplemented with 2/3 of amount daily meal in the morning, B2: fish fed dietary 2% EM supplemented with 2/3 of amount daily meal in the afternoon, C1: fish fed dietary 4% EM supplemented with 2/3 of amount daily meal in the morning and C2: fish fed dietary 4% EM supplemented with 2/3 of amount daily meal in the afternoon.

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