Exploring the effects of dietary inulin in rainbow trout fed a high-starch, 100% plant-based diet

Table 2 Growth performances and feed utilization, in rainbow trout fed the experimental diets

Zootechnical parameters	LS-0	LS-In	HS-0	HS-In	P-values
Zootechnical parameters	LS-0	LS-In	HS-0	HS-In	CHO/protein	Inulin	Interaction
Initial body weight, g	31.7 ± 0.26	31.9 ± 0.13	31.7 ± 0.19	31.8 ± 0.14
Final body weight, g	168.21 ± 4.94	159.33 ± 5.28	170.58 ± 10.10	158.40 ± 3.69	NS	*	NS
Specific growth rate^a, %/d	1.98 ± 0.04	1.91 ± 0.04	2.00 ± 0.07	1.91 ± 0.03	NS	*	NS
Daily feed intake^b, g/fish/d	1.57 ± 0.03	1.49 ± 0.04	1.57 ± 0.07	1.53 ± 0.03	NS	NS (P = 0.058)	NS
Feed efficiency^c	1.04 ± 0.02	1.02 ± 0.03	1.05 ± 0.04	0.99 ± 0.01	NS	*	NS
Protein efficiency ratio^d	2.36 ± 0.04	2.32 ± 0.07	2.95 ± 0.12	2.78 ± 0.02	***	*	NS

The four feeding groups (LS-0: Low-starch with 0 inulin; LS-In: Low-starch with 2% inulin; HS-0: high-starch with 0 inulin; and HS-In: high-starch with 2% inulin) were given to 63 fish per group (3 tanks per group) for 12 weeks. Data are presented as mean ± SD (n = 3 tanks). Statistical differences were analyzed with a two-way ANOVA test and were considered statistically significant for P < 0.05
NS Not significant, *P < 0.05, ***P < 0.001
^aSpecific growth rate, %/d = 100 × [Ln (final body weight, g)–Ln (initial body weight, g)]/Experiment duration, d
^bDaily feed intake, g/fish/d = Total feed consumed, g/Number of fish/Experiment duration, d
^cFeed efficiency = (Final biomass, g − Initial biomass, g)/Total feed consumed, g
^dProtein efficiency ratio = (Final biomass − Initial biomass)/Total protein consumed, g

ISSN: 2049-1891