Efficiency of Dietary β-glucan Supplementation on Growth, Body Composition, Feed, and Nutrient Utilization in Juveniles of Pompano Fish (Trachinotus ovatus, Linnaeus, 1758)

Hoang, D.H.; Lam, H.S.; Nguyen, C. V.

Efficiency of Dietary β-glucan Supplementation on Growth, Body Composition, Feed, and Nutrient Utilization in Juveniles of Pompano Fish (Trachinotus ovatus, Linnaeus, 1758)

Files

70.2018.1518.Hoang.pdf (473.78 KB)

Date

2018

Authors

Hoang, D.H.

Lam, H.S.

Nguyen, C. V.

Abstract

An 8-week experiment was conducted to examine the effect of increasing levels of dietary β-glucan on the growth performance, feed utilization, and body composition of juvenile pompano (Trachinotus ovatus). Pompano (mean initial weight, 6.45 g) were fed five diets containing five levels of β-glucan (D1 (control): 0%; D2: 0.05%; D3: 0.10%; D4: 0.20%; and D5: 0.40%. Results showed that growth performance, body composition, efficacy of feed and nutrient utilization were significantly affected by dietary β-glucan levels. After 8-weeks of feeding, weight gain, daily weight gain, specific growth rate, final body weight, coefficient of variation were highest in pompano fed 0.05% and 0.10% β-glucan in the diet (P ≤ 0.034), while growth of fish fed 0.2% and 0.4% β-glucan did not significantly differ compared to fish fed the control diet (P ≥ 0.170). Survival rate of juvenile pompano was not influenced by β-glucan supplement in the diet (P ≥ 0.383). In addition, feed utilization daily feed intake, feed conversion ratio, and feed conversion efficiency were significantly lower in fish fed diets supplemented with 0.01–0.10% β-glucan (P ≤ 0.027). In contrast, feeds supplemented with 0.2 to 0.4% β-glucan did not influence the feed utilization of pompano after 56 days of diet feeding (P ≥ 0.051). Protein was significantly higher in the flesh of pompano fed 0.05% to 0.10% β-glucan (P ≤ 0.001), while lipid content in fish decreased significantly with graded levels of β-glucan in the diet (P ≤ 0.044). After 56 days, protein efficiency ratio (PER), protein productive value (PPV), and fractional rates of protein growth (Kg), were significantly higher in fish fed diets supplemented with 0.05 -0.10% β-glucan (P ≤ 0.025).

Keywords

pompano fish, β-glucan, Trachinotus ovatus, growth, feed utilization, Fish culture--Israel., Fish culture

URI

http://hdl.handle.net/10524/58326

Extent

13 pages

Collections

Volume 70, 2018

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