This study aimed at evaluating the effects of a probiotic additive in productive performance and physiological parameters for Rhamdia quelen. The fish were fed diets containing increasing levels of the additive (0.15; 0.30; 0.45; and 0.60 g/kg of feed), which consisted of a blend of Bacillus cereus and B. subtilis, both at the concentration of 4 × 10¹¹ CFU). Productive performance parameters were higher in fish fed diets containing 0.60 g/kg of the probiotics. Both the proximate composition and carcass yield were affected when 0.30 and 0.60 g/kg of the additive was included, whilst serum biochemical parameters were higher in fish fed diets containing 0.60 g/kg of the additive. An increase in the hepatic oxidative stress activity was found when 0.30 g/kg was supplied. The development of intestinal villi was influenced by the inclusion of the additives, as well as the activity of mucous‐secreting cells in the tissue. Hepatocyte's growth was differential in fish fed diets containing 0.30 g/kg and other tissue alterations were found using 0.60 g/kg of the additive. The inclusion of 0.60 g/kg of the probiotic in diets for R. quelen enhances its growth performance and physiological status.

中文翻译：

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益生菌作用（蜡状芽孢杆菌和枯草芽孢杆菌）对银cat鱼（Rhamdia quelen）的生长和生理参数的影响

这项研究的目的是评估益生菌添加剂对鼠李鼠的生产性能和生理参数的影响。鱼的日粮中添加了增加水平的添加剂（0.15、0.30、0.45和0.60 g / kg饲料），该添加剂由蜡状芽孢杆菌和枯草芽孢杆菌的混合物组成，浓度均为4×10 ¹¹ CFU）。在含有0.60 g / kg益生菌的鱼饲料中，生产性能参数更高。当加入0.30和0.60 g / kg的添加剂时，近端成分和car体产量均受到影响，而在鱼粉中添加0.60 g / kg的鱼饲料中，其血清生化参数较高。当提供0.30g / kg时，发现肝氧化应激活性增加。肠绒毛的发育受添加剂的加入以及组织中粘液分泌细胞活性的影响。在以0.30 g / kg的饲料喂养的鱼中，肝细胞的生长是不同的，使用0.60 g / kg的添加剂发现了其他组织的改变。为0.60g / kg的益生菌的膳食中的夹杂物R. quelen 增强其生长性能和生理状态。