Iranian Fisheries Science Research Institute. Persian Gulf and Oman Sea Ecology Research Center, Persian Gulf Mollusks Research Station, Bandar-e- Lengeh, Iran.
Department of Fisheries, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
Fish Shellfish Immunol. 2019 Mar;86:900-905. doi: 10.1016/j.fsi.2018.12.019. Epub 2018 Dec 13.
This experiment was conducted to evaluate the effects of dietary supplementation of Apple cider vinegar (ACV) and propionic acid (PA) on biochemical parameters of hemolymph, intestinal microbiota and histology of hepatopancreas in white shrimp (Litopenaeus vannamei). Five experimental diets were evaluated in this study including diets supplemented with 1.0, 2.0 and 4.0% of ACV, 0.5% propionic acid, and a control diet with no supplements. Shrimps (initial weight of 10.2 ± 0.04 g) in triplicate groups with the density of 25 shrimps per tank were fed the diets for 60 days. At the end of the feeding trial, shrimps fed with ACV and PA supplemented diets had significantly higher total protein level than those fed the control diet (P < 0.05). The number of Vibrio spp., R-cells (lipid storage cells) of hepatopancreas and cholesterol level in shrimps fed the diets containing ACV and PA were lower compared to the control group (P < 0.05). However, there was no remarkable variations in glucose concentration, B-cell number and tubule diameter among the experimental diets (P > 0.05). In addition, shrimps fed the ACV diets had significantly lower total heterotrophic marine bacteria compared to the control or PA groups, and the lowest bacterial number was observed in shrimp fed 4% ACV supplemented diet (P < 0.05). Supplementation of 2 and 4% ACV as well as 0.5% PA in the diet led to a significantly higher calcium concentration than the control treatment (P < 0.05). The lowest triglyceride concentration was observed in the shrimps fed diets containing 2.0 and 4.0% ACV, which resulted in 15 and 20% reduction, respectively (P < 0.05). Overall, the findings indicates that ACV and PA possess antimicrobial activity and demonstrate beneficial effects on health status, so they can be potentially used as feed additive in the feeding of L. vannamei.
本实验旨在评估苹果醋(ACV)和丙酸(PA)的膳食补充对凡纳滨对虾(Litopenaeus vannamei)血淋巴生化参数、肠道微生物群和肝胰腺组织学的影响。本研究评估了五种实验饲料,包括添加 1.0、2.0 和 4.0%的 ACV、0.5%丙酸以及不含补充剂的对照饲料。将初始体重为 10.2±0.04g 的虾分为三组,每组 25 只虾,在水族箱中饲养,喂食这些饲料 60 天。在饲养试验结束时,与对照组相比,喂食 ACV 和 PA 补充饲料的虾的总蛋白水平显著升高(P<0.05)。与对照组相比,喂食含 ACV 和 PA 的饲料的虾的弧菌数量、肝胰腺的 R 细胞(脂质储存细胞)和胆固醇水平较低(P<0.05)。然而,实验组之间葡萄糖浓度、B 细胞数量和小管直径没有显著变化(P>0.05)。此外,与对照组或 PA 组相比,喂食 ACV 饲料的虾的总异养海洋细菌数量显著降低,在喂食添加 4%ACV 的饲料的虾中观察到最低的细菌数量(P<0.05)。饲料中添加 2%和 4%的 ACV 以及 0.5%的 PA 可使钙浓度显著高于对照组(P<0.05)。在喂食含有 2.0%和 4.0%ACV 的饲料的虾中观察到最低的甘油三酯浓度,分别降低了 15%和 20%(P<0.05)。总的来说,这些发现表明 ACV 和 PA 具有抗菌活性,并对健康状况有有益影响,因此它们可以作为凡纳滨对虾饲料的潜在添加剂。