Effects of Dietary Supplementation of Barodon, an Anionic Alkali Mineral Complex, on Growth Performance, Feed Utilization, Innate Immunity, Goblet Cell and Digestibility in Olive Flounder (<italic>Paralichthys olivaceus</italic>)

Abstract

A 15-wk feeding trial was conducted to examine the supplemental effects of Barodon on growth performance, gastrointestinal histology, feed digestibility and innate immunity in olive founder. A basal commercial diet was used as a control and two other diets were prepared by spraying 0.1% or 0.2% of Barodon. Triplicate groups of fish (BW, 145 g) were fed one of the test diets to apparent satiation twice daily. At the end of the feeding trial, fish growth performance was not significantly affected by dietary treatments; however, feed utilization was significantly improved (linear and quadratic, p<0.05) by Barodon supplementation. Significantly higher (p<0.05) survival rates were obtained in fish fed Barodon containing diets. Hepatosomatic index increased significantly in Barodon treated groups. Also, the use of Barodon resulted in significant increase (linear and quadratic, p<0.05) of intestine length and number of goblet cells. Significantly higher (Quadratic, p<0.05) apparent digestibility coefficient of DM was obtained by supplementation of Barodon. Lysozyme and myeloperoxidase activities increased quadratically and linearly, respectively, in Barodon treated fish. Also, significantly higher (linear and quadratic, p<0.05) superoxide dismutase activity was found in Barodon fed fish. The findings in this study show that inclusion of Barodon in diets for olive flounder improves feed utilization and digestibility, and positively affects digestive tract histology and innate immunity.

Evaluation of dietary natural mineral materials as an antibiotic replacer on growth performance, non-specific immune responses and disease resistance in rainbow trout,Oncorhynchus mykiss

“…In agreement with the results of this study, natural mineral materials have been shown to enhance immune function in some previous studies (Koo ; Jurkić, Cepanec, Pavelić & Pavelić ; Shin et al . ). Lysozyme activity plays an important role in protecting the host from the infection by bacteria for the innate immunity in fish (Ellis ).…”

“…This result is in agreement with Shin et al . () who reported the enhancement of serum lysozyme after dietary administration Barodon, an anionic alkali mineral complex.…”

“…The experimental diets were prepared by spraying the mineral materials (Shin et al . ). Then, the pelleted feeds were dried for 72 h. After drying, the pellets were broken up, sieved into the proper diameter size, sealed and stored at −20°C until use for feeding trial.…”

“…In a previous study, Lee, Katya, Yun, Yoon, Park, Sung, Shin and Bai () reported that dietary yellow loess at 1–2% per kg diet (0.2–0.4% on dry matter basis) has positive impact as an antibiotic replacer in terms of growth improvement and disease resistance in juvenile rainbow trout. Dietary additive studies in juvenile fish were usually conducted for 1–8 weeks (Sharifuzzaman & Austin ; Park, Lee, Hong, Kim, Moniruzzaman & Bai ), whereas in larger fish the experiment lasted for more weeks to understand the effects of additives in fish (Shin, Cha, Rahimnejad, Jeong, Yoo, Lee, Ahn, Choi, Choi, Park, Kim & Lee ). However, the reasons are not clearly ascertained (Sharifuzzaman & Austin ).…”

Can heat-killed Gordonia bronchialis enhance growth and immunity in rainbow trout (Oncorhynchus mykiss )?

“…; Shin et al . ). Goblet cells in the gastrointestinal tract provide protection against damage by forming a viscous, hydrated blanket on the surface of the mucosa which acts as a sensitive first line of immune defence parameter in fish (Shin et al .…”