Effect of β-Mannanase and α-Galactosidase Supplementation to Soybean Meal Based Diets on Growth, Feed Efficiency and Nutrient Digestibility of Rainbow Trout, <i>Oncorhynchus mykiss</i> (Walbaum)

Abstract

A 12-week feeding trial was conducted with 87 g rainbow trout to evaluate the effects on growth performances, feed efficiency and nutrient digestibility of adding β-mannanase and α-galactosidase enzymes, solely or in combination. Seven diets were prepared by adding β-mannanase, α-galactosidase and mixed enzyme at two different levels (1 g/kg and 2 g/kg) to control diet (without enzyme) including soybean meal. Mixed enzymes (1 g/kg, 2 g/kg) were prepared by adding β-mannanase and α-galactosidase at the same doses (0.5+0.5 g/kg and 1+1 g/kg). At the end of the experiment, addition of β-mannanase, α-galactosidase and mixed enzyme to diet containing 44% soybean meal had no significant effects on growth performance and gain:feed (p>0.05). In addition, adding β-mannanase, α-galactosidase and mixed enzyme in different rations to trout diets had no affect on nutrient digestibility and body composition (p>0.05).

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“…cellulase, xylanase, etc.) are capable of disrupting plant cell wall integrity, this enhances rapid digestion by reducing viscosity in the gut (Zijlstra et al, 2010;Bedford & Cowieson, 2012).The beneficial effects of exogenous non-starch polysaccharidases (NSPase) may be directly related to NSP hydroxylation, which improves carbohydrate digestibility, or to the improvement of other nutrients digestibility (Adeola & Bedford, 2004;Ai et al, 2007;Adeola & Cowieson, 2011;Yiğit et al, 2014).…”

Feeding marbled spinefoot rabbitfish (Siganus rivulatus) juveniles with β‐mannanase enzyme: An effective tool to enhance growth and immunity and induce low salinity tolerance

“…Moreover, MOS did not affect body protein and lipid deposition in Japanese flounder (Ye, Wang, Li, & Sun, 2011). ß-mannanase enzyme had no effect on body composition of rainbow trout (Yiğit et al, 2014) and red tilapia (Siti-Norita et al, 2015). The result obtained by Yiğit et al (2014) might be attributed to low water temperature used in that study.…”

“…ß-mannanase enzyme had no effect on body composition of rainbow trout (Yiğit et al, 2014) and red tilapia (Siti-Norita et al, 2015). The result obtained by Yiğit et al (2014) might be attributed to low water temperature used in that study. High water temperature enhanced the dietary enzyme efficiency (Forster, Higgs, Dosanjh, Rowshandeli, & Parr, 1999).…”

“…Siti-Norita Arbakariyab Noor-Azlinac and Ibrahimc (2015) reported that ß-mannanase improved the growth performance, energy and nutrient digestibility of red tilapia. However, Mussini et al (2011), Kong et al (2011) and Yiğit, Koca, Didinen, and Diler (2014) documented that ß-mannanase did not affect the growth performance and feed utilization efficiency of rainbow trout (Oncorhynchus mykiss). Thus, these studies are controversial and not conclusive.…”

Xylanase and Phytase Supplementation in the De-oiled Rice Bran (DORB) based Diet Improves the Growth Performance of Labeo rohita

“…NSPase were shown to increase the growth performance, feed conversion, and protein utilization efficiency in juvenile Japanese seabass (Lateolabrax japonicas; Ai et al, 2007), hybrid tilapia (Oreochromis niloticus × Oreochromis aureus; Lin et al, 2007); Caspian salmon (Salmo trutta caspius; Zamini et al, 2014) and African catfish (Clarias gariepinus; Yildirim and Turan, 2010). The beneficial effects of exogenous non-starch polysaccharidases (NSPase) may be directly related to NSP hydroxylation, which improves carbohydrate digestibility, or to the improvement of other nutrients digestibility (Adeola and Bedford, 2004;Ai et al, 2007;Adeola and Cowieson, 2011;Yiğit et al, 2014). Xylanase hydrolyses cell wall components in plant and efficiently reduces NSP content in plant ingredient which in turn improves protein utilization and growth performance in several fish experiment.…”