Effects of dietary fermented by-product of mushroom, Pleurotus ostreatus , as an additive on growth, serological characteristics and nonspecific immune responses in juvenile Amur catfish, Silurus asotus

Abstract

The present experiment was conducted to evaluate the efficacy of dietary fermented by-product of mushroom, Pleurotus ostreatus, (FBPM) as an additive in juvenile Amur catfish, Silurus asotus. Five diets were formulated to contain 0%, 0.1%, 0.2%, 0.4% and 0.8% (FBPM 0 , FBPM 0.1 , FBPM 0.2 , FBPM 0.4 and FBPM 0.8 respectively) of FBPM. Fifteen fish averaging 5.7 AE 0.1 g (Mean AE SD) were fed one of the five diets in triplicate groups at 3-4% of wet body weight/day for 8 weeks. Average weight gain (WG) and specific growth rate (SGR) of fish fed FBPM 0.1 and FBPM 0.2 diets were significantly higher than those of fish fed FBPM 0 . Hematocrit contents of fish fed FBPM 0.2 were significantly higher than that of fish fed FBPM 0 . Lysozyme activity of fish fed FBPM 0.1 was significantly higher than those of fish fed FBPM 0 , FBPM 0.2 , FBPM 0.4 and FBPM 0.8, while chemiluminescent (CL) responses of fish fed FBPM 0.2 was significantly higher than those of fish fed FBPM 0 , FBPM 0.1 , FBPM 0.4 and FBPM 0.8 . Broken line regression analysis of WG showed that optimum dietary FBPM levels based on WG could be 0.11%. Therefore, these results suggested that the optimum dietary inclusion level of mushroom, Pleurotus ostreatus by-product fermented using lactobacillus and yeast could be greater than 0.11% but less than 0.2% based on WG and immunological responses in Amur catfish, Silurus asotus without any adverse effects on serological characteristics and body composition.

Growth, enzymatic glutathione peroxidase activity and biochemical status of juvenile barramundi (Lates calcarifer) fed dietary fermented lupin meal supplemented with organic selenium

“…Plasma TP was used as a fundamental indicator of physiological condition and health status of juvenile barramundi, in accordance with data reported for other species (Al‐Dohail, Hashim & Aliyu‐Paiko, ; Han et al., ; Katya, Yun, Yun, Lee & Bai, ; López, Flores‐Ibarra, Bañuelos‐Vargas, Galaviz & True, ; Sardar, Randhawa, Abid & Prabhakar, ). The TP level for fermented LM‐fed fish obtained in this study (43 g/L) was slightly higher than the reported TP concentration for barramundi when fed with narrowleaf lupin L .…”

Evaluation of dietary yellow loess as an antibiotic replacer on growth, immune responses, serological characteristics and disease resistance in rainbow trout,Oncorhynchus mykiss

“…The rainbow trout, just like other fish species in commercial aquaculture, is usually reared in enclosed spaces, and efforts have been made to increase productivity per unit space (Sakai ; Katya et al . ). This development has led to overcrowding, which tends to adversely affect the health of fish.…”

“…A massive expansion along with the intensification has led to sudden increase in the annual production of rainbow trout in the Republic of Korea and has reached 3066 ton in 2012 (FAO 2014). The rainbow trout, just like other fish species in commercial aquaculture, is usually reared in enclosed spaces, and efforts have been made to increase productivity per unit space (Sakai 1999;Katya et al 2014). This development has led to overcrowding, which tends to adversely affect the health of fish.…”

Effects of two dietary probiotics ( Bacillus subtilis or licheniformis ) with two prebiotics (mannan or fructo oligosaccharide) in Japanese eel, Anguilla japonica

“…Its aquaculture production in 2018 was 10,530 metric tons valued at 306 million won taking account for 37.5% of total freshwater fish production in Republic of Korea (KOSTAT, ). Japanese eel, just like any other fish species in commercial aquaculture, is usually reared in enclosed spaces and efforts have been made to increase productivity per unit space (Bai, Katya, & Yun, ; Katya, Yun, Yun, Lee, & Bai, ). This development has led to overcrowding, which tends to adversely affect the immune system and become more susceptible to disease.…”