Evaluation of different dietary additives based on growth performance, innate immunity and disease resistance in juvenile Amur catfish, Silurus asotus

• Published in: International aquatic research Vol. 9; no. 4; pp. 351 - 360
• Main Authors: Amoah, Yaa Tiwaah, Moniruzzaman, Mohammad, Lee, Seunghan, Bae, Jinho, Won, Seonghun, Seong, Minji, Bai, Sungchul C.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-12-2017; Islamic Azad University, Tonekabon Branch, Vali abad; Islamic Azad University
• Subjects: Additives; Amur catfish; Aquatic Pollution; Body weight; Body weight gain; Catfish; Diet; Disease resistance; Earth and Environmental Science; Economics; Ecotoxicology; Environment; Evaluation; Feed conversion efficiency; Feed efficiency; Feeding experiments; Feeds; Fish; Freshwater & Marine Ecology; Freshwater fishes; Glucan; Growth; Growth rate; Immune response; Immune responses; Immunity; Innate immunity; Juveniles; Lysozyme; Marine & Freshwater Sciences; Original Research; Proteins; Silurus; Silurus asotus; Song-gang® stone; Stone; Sulfur; Superoxide dismutase; Survival; Waste Water Technology; Water; Water Management; Water Pollution Control; Weight gain; Yucca meal; β-Glucan; Growth; Song-gang; Yucca meal; Amur catfish; β-Glucan; Immune responses; stone
• ISSN: 2008-4935; 2008-6970
• DOI: 10.1007/s40071-017-0181-2

Three different dietary additives were evaluated based on growth performance, innate immune responses and disease resistance in juvenile Amur catfish
Silurus asotus
. Four diets were prepared by supplementing 0.4% Song-gang
®
stone (SG), 0.05% Yucca meal (YM), 0.05% β-glucan (BG) in combination with 0.04% SG and 0.05% BG (SG + BG) to a basal commercial diet (control; CONT). Triplicate groups of fish averaging 4.95 ± 0.05 g were fed one of the test diets between 3 and 5% body weight for 8 weeks. At the end of the feeding trial, weight gain, specific growth rate, feed efficiency and protein efficiency ratio of fish fed SG and SG + BG were significantly higher than those of fish fed the BG and CONT diets (
P
 < 0.05). Lysozyme activity in fish fed the SG, YM, and SG + BG diets was significantly higher than those of fish fed the CONT diet. Super oxide dismutase (SOD) activity was significantly higher among fish fed the SG, YM, BG and SG + BG diets than fish fed the CONT diet. After 14 days challenge test with
Edwardsiella tarda
, cumulative survival rates of fish fed the SG and SG + BG diets were significantly higher than those of fish fed the BG and CONT diets. Results revealed that dietary SG or SG + BG diets had positive responses over other additives in juvenile Amur catfish. However, Song-gang
®
stone is proposed to be a cheaper dietary additive contributing 0.04 cents/kg of feed based on economic point of view.