Mean final weight specific growth

Treatments
Parameter	Shrimp pond	NF	FF	FF+NF	FF+NF+S
Mean final weight (g)	7.87 ± 0.29^b	3.99 ± 1.8^a	7.66 ± 0.7^b	9.47 ± 1.0^c	8.72 ± 0.31^b,c
SGR	3.5-3.8(3.7)	1-3(2)	3.2-4(3.7)	4-4.7(4.4)	3.9-4.2(4.1)
Survival rate (%)	80 ± 5	85 ± 3	87 ± 3	90 ± 2	97 ± 1
FCR	1.1-1.3	—	1.3-1.7	0.6-1.3	0.6-1.4
k (d^-1)	0.04 ± 0.01^b	0.019 ± 0.01^a	0.04 ± 0.01^b	0.044 ± 0.01^b	0.041 ± 0.01^b
m (d^-1)	0.18 ± 0.01^b	0.075 ± 0.04^a	0.17 ± 0.03^b	0.24 ± 0.04^c	0.21 ± 0.01^b,c
t₅₀ (d)	2.8-3.6(3.1)	8.1-15(11)	2.5-4(3.3)	1.2-3.7(2.4)	2.4-3.1(2.7)
δ¹⁵N(‰)	7.71 ± 0.42	8.82 ± 0.30	8.36 ± 0.39	8.23 ± 0.38	8.01 ± 0.26
δ¹⁵Ng (‰)	7.70 ± 0.46	10.95 ± 1.2	8.73 ± 0.43	8.44 ± 0.38	8.15 ± 0.27
Relative contribution (%)	7-32(16)	100	—	5-29(10)	16-38(18)

Different superscripts indicate significant differences (a<b<c).

Table 5: Mean final weight, specific growth rate (SGR) and growth parameters (m and k), survival, feed conversion ration (FCR), natural stable isotope value (δ¹⁵N) and estimated N half time (t₅₀) in tissue of medium (initial weight, 2.79 ± 0.26 g, δ¹⁵N=7.72 ± 0.3‰) L. vannamei reared for 28-days with formulated feed (FF, Pellet 35), natural feed (NF) and 50:50 formulated+natural feeds as plankton+biofloc (δ¹⁵N_NF=6.7 ± 0.83‰) (FF+NF) and plankton+bioflocs+benthos (δ¹⁵N_NF=7.54 ± 0.83‰) (FF+NF+S) (Trial 3). Relative contribution of natural diet to the growth of specimens reared on FF+NF and FF+NF+S treatments. Isotopic trophic enrichment (Δ¹⁵N=δ¹⁵N_shrimp–δ¹⁵N_NF or FF) was estimated in 2.12‰ for NF and 2.56‰ for FF.

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