Comparative evaluation of fermented and non-fermented de-oiled rice bran with or without exogenous enzymes supplementation in the diet of Labeo rohita (Hamilton, 1822)

Abstract

A 60-day feeding trial was conducted to study the effect of exogenous enzymes (xylanase and phytase) supplementation in the non-fermented and fermented de-oiled rice bran (DORB)-based diet of Labeo rohita. Four test diets (T1-DORB-based diet, T2-fermented DORB-based diet, T3-phytase and xylanase supplemented DORB-based diet, and T4-phytase and xylanase supplemented fermented DORB-based diet) were formulated and fed to the respective groups. Test diets T3 and T4 were supplemented with 0.01% xylanase (16,000 U kg) and 0.01% phytase (500 U kg) enzymes. One hundred twenty juveniles of L. rohita, with an average weight 5.01 ± 0.02 g, were stocked in 12 uniform size plastic rectangular tanks in triplicate with 10 fishes per tank following a completely randomized design (CRD). Exogenous enzyme supplementation to the T3 group significantly improved the growth performance of L. rohita (p < 0.05). Fermented DORB fed groups registered significantly lower growth irrespective of the supplementation of exogenous enzymes. The carcass composition (except CP %), enzyme activities (except amylase activity), globulin, and A/G ratio did not vary significantly (p > 0.05). Based on the results of the present study, it is concluded that exogenous enzyme supplementation significantly increases the growth of fish fed with DORB-based diet.

Influence of inclusion of pigeon pea ( Cajanus cajan ) leafmeal on growth, physio‐metabolic and immune parameters, and expression of IGF‐1, IGF‐1R and IGFBP‐1 genes in Labeo rohita (Hamilton, 1822) fingerlings

“…The findings of Kumar et al (2017), Kumar Sahu, and Ranjan (2018), Kumar, Sahu, Shamna, et al (2018), Lovell (1989)), Meshram et al. (2018), Ranjan, Sahu, Deo, Kumar, Kumar, et al (2018), Ranjan et al (2018) and Anand et al (2020) also reported the similar findings. GSI and HSI showed no significant difference ( p > 0.05) between different experimental groups.…”

“…Nutrient digestibility is positively correlated with the digestive enzyme activity of any species (De et al., 2015). Digestive enzyme influences the digestive process and improves the growth performance of animals (Anand et al, 2020; Kumar et al, 2019, 2017; Kumar, Sahu, & Ranjan, 2018; Kumar, Sahu, Shamna, et al, 2018; Lemieux et al., 1999; Meshram et al., 2018; Ranjan, Sahu, Deo, Kumar, Kumar, et al, 2018; Ranjan et al, 2018). The ability of any fish to digest and absorb nutrients depends on the presence of anti‐nutrients, dietary fibre content and the quality of digestive enzymes (Anand et al, 2020; Meshram et al., 2018).…”

“…Intensive aquaculture proliferates; this leads to an increase in requirement for high‐quality protein and lipid sources (Barlow, 1989; Hardy, 1996). However, another important feed constituent, de‐oiled rice bran (DORB), is rapidly becoming a major ingredient in fish feed for carps (Anand et al, 2020; Meshram et al., 2018; Ranjan, Sahu, Deo, Kumar, Kumar, et al, 2018; Ranjan et al, 2018) as documented in recent studies and an increasingly competitive component of animal feeds in India as it is being used for poultry, cattle and human consumption as well. The rapid increase in feed‐based aquaculture requires more feed which, in turn, requires more rice bran.…”

Optimization of de-oiled rice bran inclusion level in the diet ofLabeo rohita: Effect on growth performance, nutrient utilization, insulin-like growth factors I and II gene expression

“…Labeo rohita is a commercially important freshwater fish, which is widely cultured in Asia and in Indian subcontinent (Iqbal et al, ; Ranjan et al, ; Ranjan, Sahu, Deo, Kumar, Kumar, et al, ; Ranjan, Sahu, Deo, & Kumar, ). Semi‐intensive carp culture system is predominant in the Indian subcontinent.…”

“…Consequently, fish farmers are emphasizing to use the cheaper ingredients for feeding the fish. As a present practice, DORB is the major and most commonly used feed ingredient for carp feeds in the country and is used by carp farmers either singly or in combination with other ingredients (Kumar, Sahu, Shamna, & Ranjan, ; Kumar, Sandor, et al, ; Ramakrishna, Shipton, & Hasan, ; Ranjan, Sahu, Deo, Kumar, Kumar, et al, ; Ranjan, Sahu, Deo, & Kumar, ). After DORB, farmers prefer to use GNOC and CSOC in the carp feed.…”