Effects of dietary fiber on growth, feed efficiency and nutrient utilization of tinfoil barb (Barbonymus schwanenfeldii, Bleeker 1853) fry
An 8-week feeding trial was conducted to determine dietary fiber utilization level in Barbonymus schwanenfeldii fry based on the growth, feed efficiency and nutrient utilization. Intestinal α-amylase activity and liver and intestinal histology were used to evaluate the growth performance of fish. Fi...
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Veröffentlicht in: | Aquaculture reports 2023-10, Vol.32, p.101743, Article 101743 |
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Sprache: | eng |
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Zusammenfassung: | An 8-week feeding trial was conducted to determine dietary fiber utilization level in Barbonymus schwanenfeldii fry based on the growth, feed efficiency and nutrient utilization. Intestinal α-amylase activity and liver and intestinal histology were used to evaluate the growth performance of fish. Five isonitrogenous (48% crude protein) and isocaloric (20.1 kJ g⁻¹ gross energy) diets were prepared with different fiber levels (0.9%, 3.18%, 5.97%, 8.34% and 10.73%). Each diet was randomly assigned to triplicate groups of fish (0.557 ± 0.001 g) at 20 fry per 100 L glass aquarium. Results revealed that tinfoil barb fry tolerated 10.73% dietary fiber without compromising their growth. Average daily feed intake and feed conversion ratio linearly decreased with increasing fiber levels (P = 0.02). Protein efficiency had a positive association with dietary fiber levels (P = 0.03). Although whole body protein, ash and fiber contents were not related to dietary fiber levels, energy and lipid content linearly decreased with increased dietary fiber levels (P = 0.03). Retention of dietary protein and carbohydrate positively related to dietary fiber levels (P = 0.03). However, lipid and energy retentions were independent of dietary fiber concentrations. Intestinal α-amylase activity showed a unique association with dietary fiber intake in intestinal bulb (P |
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ISSN: | 2352-5134 2352-5134 |
DOI: | 10.1016/j.aqrep.2023.101743 |