Ácido fítico

The study aimed to evaluate phytic acid supplementation at different levels in diets for juveniles of silver catfish. Five diets were prepared with different phytic acid concentrations (0; 5.00; 10.00; 15.00 and 20.00 g/kg). A 50-day biological test was performed in a water recirculation system composed of 20 tanks (15 fish/tank), where the animals were fed three times a day, until apparent satiety with experimental diets. After the experimental period, the fish fasted and were submitted to biometry to collect data, blood and tissues, later used to determine performance, plasma and liver metabolism, activity of digestive enzymes, body composition, digestive indices and activity of pro and antioxidant enzymes. Our results show that the consumption of phytic acid in low concentration (10.00 g/kg) promotes greater performance of fish, better body composition and does not negatively affect the activity of digestive enzymes. In addition, it has reduced the activity of prooxidant enzymes and increased the antioxidants. Thus, we can conclude that when correctly administered and directed, phytic acid acts as an antioxidant and performance promoter for silver catfish.

本研究旨在评估不同水平的有机酸补充剂对银鲈幼鱼的饲料效果。共制备了五种含有不同有机酸浓度的饲料（0；5.00；10.00；15.00和20.00克/千克）。在由20个水箱（每个水箱15条鱼）组成的水循环系统中，进行了为期50天的生物试验，鱼儿每天喂食三次，直至对实验饲料感到饱足。实验期结束后，鱼儿进行禁食处理，并接受生物测量以收集数据、血液和组织样本，这些样本随后被用于确定鱼儿的性能、血浆和肝脏代谢、消化酶活性、身体成分、消化指标以及抗氧化和促氧化酶的活性。我们的研究结果表明，低浓度（10.00克/千克）的有机酸摄入促进了鱼儿的生长性能，改善了身体成分，并且没有对消化酶活性产生负面影响。此外，它还降低了促氧化酶的活性并增加了抗氧化剂的含量。因此，我们可以得出结论，在正确使用和指导下，有机酸作为一种抗氧化剂和性能促进剂对银鲈具有积极作用。