Dietary Supplementation with Ginger (Zingiber officinale) Residue from Juice Extraction Improves Juvenile Black Rockfish (Sebastes schlegelii) Growth Performance, Antioxidant Enzyme Activity and Resistance to Streptococcus iniae Infection

Animals

Hwa Yong Oh¹  Tae Hoon Lee¹  Min-Soo Joo¹  Hee Sung Kim¹  Chang-Hwan Lee¹  Da-Yeon Lee¹  Kyoung-Duck Kim² 

[1] Department of Marine Biology and Aquaculture, Gyeongsang National University, Tongyeong 53064, Korea;Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science, Tongyeong 53017, Korea;

关键词: ginger residue from juice extraction (GRJE);    growth performance;    antioxidant enzyme activities;    resistance against S. iniae;    black rockfish (Sebastes schlegelii);   

DOI  :  10.3390/ani12050546

来源: DOAJ

【 摘 要 】

Plant-derived feed additives provide cost effective and environmentally friendly alternatives to antibiotics for improving fish performance in aquaculture. An 8-week feeding trial was conducted to evaluate the effects of dietary ginger residue from juice extraction (GRJE) on juvenile black rockfish (Sebastes schlegelii) growth performance, antioxidant enzyme activities, and resistance to Streptococcus iniae infection. Juvenile rockfish (n = 450; initial weight = 2.2 ± 0.01 g) were randomly distributed into 30 L rectangular tanks (30 fish per tank). Five experimental diets with GRJE concentrations of 0% (control), 0.25%, 0.5%, 0.75%, and 1% were prepared in triplicate. Three groups of fish were randomly assigned to each diet and fed to apparent satiation twice daily. After the feeding trial, fish were challenged with S. iniae, and cumulative survival was observed for six days. Growth parameters, feed efficiency, and the protein efficiency ratio showed a quadratic correlation with the GRJE concentration in the fish diet. Proximate composition and plasma chemistry were not significantly affected. Plasma lysozyme, superoxide dismutase, glutathione, and catalase activities linearly increased with increasing GRJE supplementation levels. Moreover, survival in the S. iniae challenge test was significantly higher in fish fed diets supplemented with 0.75–1% GRJE. Our findings demonstrated that 0.75% GRJE dietary supplementation enhanced the growth performance, antioxidant activity, and disease resistance of juvenile black rockfish with no adverse effects.

【 授权许可】

Unknown