Dietary protein requirement of Pacific white shrimp Litopenaeus vannamei in three different growth stages

Chorong Lee; Kyeong-Jun Lee

doi:10.1186/s41240-018-0105-0

Table 2 Growth performance and feed utilization of L. vannamei fed the six experimental diets containing six different levels of crude protein (25, 30, 35, 40, 45, and 50% for P25, P30, P35, P40, P45, and P50, respectively)

From: Dietary protein requirement of Pacific white shrimp Litopenaeus vannamei in three different growth stages

	Experimental diets
	P25	P30	P35	P40	P45	P50
Trial 1 (initial BW 0.65 g)
FBW¹	4.34 ± 0.66	4.46 ± 0.38	4.68 ± 0.24	4.92 ± 0.66	4.80 ± 0.53	4.40 ± 0.28
WG²	571 ± 103	586 ± 58.4	619 ± 36.3	660 ± 102	637 ± 86.8	579 ± 44.1
DBI³	0.10 ± 0.02	0.11 ± 0.01	0.11 ± 0.01	0.12 ± 0.02	0.12 ± 0.01	0.10 ± 0.01
FCR⁴	1.77 ± 0.36	1.43 ± 0.35	1.32 ± 0.23	1.49 ± 0.34	1.58 ± 0.19	1.41 ± 0.36
PER⁵	2.33 ± 0.45^ab	2.37 ± 0.58^a	2.16 ± 0.40^abc	1.58 ± 0.37^bc	1.42 ± 0.18^c	1.47 ± 0.33^bc
Survival⁶	88.9 ± 7.86	85.2 ± 3.21	85.2 ± 3.21	86.1 ± 3.93	92.6 ± 32.1	83.3 ± 0.00
Trial 2 (initial BW 4.81 g)
FBW¹	10.8 ± 0.93^b	11.6 ± 0.43^ab	13.1 ± 1.18^a	12.2 ± 0.92^ab	11.7 ± 0.15^ab	12.0 ± 1.32^ab
WG²	125 ± 19.1^b	141 ± 8.43^ab	173 ± 23.5^a	153 ± 18.6^ab	145 ± 3.94^ab	148 ± 27.4^ab
DBI³	0.14 ± 0.02^b	0.16 ± 0.01^ab	0.20 ± 0.03^b	0.18 ± 0.02^ab	0.17 ± 0.00^ab	0.17 ± 0.03^ab
FCR⁴	2.29 ± 0.25^a	2.06 ± 0.13^ab	1.71 ± 0.29^b	1.71 ± 0.18^b	2.01 ± 0.27^ab	1.83 ± 0.33^ab
PER⁵	1.70 ± 0.19^a	1.60 ± 0.10^a	1.67 ± 0.31^a	1.47 ± 0.16^ab	1.12 ± 0.16^b	1.12 ± 0.18^b
Survival⁶	91.7 ± 8.33	88.9 ± 12.7	83.3 ± 8.33	80.6 ± 4.81	80.6 ± 9.62	86.1 ± 12.7
Trial 3 (initial BW 10.5 g)
FBW¹	15.5 ± 0.47^b	18.7 ± 0.77^a	19.5 ± 2.02^a	18.0 ± 0.26^a	18.2 ± 0.73^a	18.3 ± 1.05^a
WG²	46.8 ± 4.59^b	77.8 ± 6.88^a	85.2 ± 19.4^a	70.9 ± 2.95^a	72.8 ± 6.62^a	72.9 ± 10.4^a
DBI³	0.10 ± 0.01^b	0.17 ± 0.02^a	0.19 ± 0.04^a	0.16 ± 0.01^a	0.16 ± 0.01^a	0.16 ± 0.02^a
FCR⁴	2.76 ± 0.26^a	1.64 ± 0.16 ^b	1.55 ± 0.32 ^b	1.72 ± 0.14^b	1.69 ± 0.22^b	1.80 ± 0.29^b
PER⁵	1.38 ± 0.13^c	1.98 ± 0.19^a	1.88 ± 0.41^ab	1.49 ± 0.12^bc	1.33 ± 0.17^c	1.15 ± 0.18^c
Survival⁶	87.9 ± 10.5	97.0 ± 5.25	90.9 ± 0.00	81.8 ± 15.7	81.8 ± 0.00	81.8 ± 9.09

Values are mean of triplicate groups and presented as mean ± S.D. Values with different superscript letters in the same row are significantly different (P < 0.05). The lack of superscript letter indicates no significant differences among treatments
¹FBW final body weight (g)
²Weight gain (%) = [(final mean body weight − initial mean body weight)/initial mean body weight] × 100
³Daily body increase (g/day) = (final body weight − initial body weight)/days
⁴Feed conversion ratio = dry feed fed (g)/wet weight gain (g)
⁵Protein efficiency ratio = wet weight gain/total protein given
⁶Survival (%)

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