Table 4 Formulation and proximate compositions of the experimental diets (% of dry matter).

Ingredients	Diets
Ingredients	C0	C8	C12	C16	C20	C24
Fish meal	57	57	57	57	57	57
Wheat gluten	13	13	13	13	13	13
Alpha-starch	0	5	5	5	5	5
Corn starch	0	1.7	5.7	9.7	13.7	17.7
Soybean lecithin	1	1	1	1	1	1
Fish oil	3.5	3.5	3.5	3.5	3.5	3.5
Choline chloride	0.4	0.4	0.4	0.4	0.4	0.4
Ethoxyquin	0.05	0.05	0.05	0.05	0.05	0.05
Mold inhibitor^a	0.1	0.1	0.1	0.1	0.1	0.1
Monocalcium phosphate	0.5	0.5	0.5	0.5	0.5	0.5
Vitamin premix^b	0.6	0.6	0.6	0.6	0.6	0.6
Minerals premix^c	0.5	0.5	0.5	0.5	0.5	0.5
Y₂O₃	0.1	0.1	0.1	0.1	0.1	0.1
Bentonite	6.7	0	0	0	0	0
Carboxymethyl cellulose	16.55	16.55	12.55	8.55	4.55	0.55
Total	100	100	100	100	100	100
Proximate analysis (% dry matter)
Dry matter (% diet)	95.65	96.80	96.61	97.23	97.08	96.96
Crude protein	49.96	49.59	49.49	49.60	49.99	50.44
Crude lipid	9.59	9.73	9.65	9.98	9.75	9.96
Carbohydrate^d	0.93	7.01	11.06	15.60	19.96	23.18
Ash	17.73	12.46	11.72	11.73	11.93	12.13

^aMold inhibitor: 50% calcium propionic acid and 50% fumaric acid.
^bVitamin premix (g kg⁻¹ of diet): microcrystalline cellulose, 9.884 × 10^–2; VA, 1.92 × 10^–4; VB1, 1.5 × 10^–4; VB2, 2.7 × 10^–4; VB6, 1.2 × 10^–4; VB12, 6 × 10^–5; VD, 2.1 × 10^–4; VE, 1.44 × 10^–3; VK, 6 × 10^–5; calcium pantothenate, 3.6 × 10^–4; nicotinic acid, 1.2 × 10^–3; folic acid, 1.2 × 10^–4; biotin, 3.6 × 10^–4; inositol, 4.8 × 10^–3; VC phosphate, 1.2 × 10^–2.
^cMineral premix (g kg⁻¹ of diet): MgSO₄·7H₂O, 6 × 10^–3; CuSO₄·5H₂O, 5 × 10^–5; FeSO₄·H₂O, 4 × 10^–4; ZnSO₄·H₂O, 2.5 × 10^–4; MnSO₄·H₂O, 2.25 × 10^–4; CoCl₂·6H₂O (1%), 2.5 × 10^–4; Na₂SeO₃ (1%), 1 × 10^–4; calcium iodate, 3 × 10^–4; zeolite powder, 4.243 × 10^–2.
^dDetermined by the 3,5-dinitro salicylic acid method¹²⁰.

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