Chung Samantha, Lemos Carlos H DA P, Teixeira Daniel V, Fortes-Silva Rodrigo, Copatti Carlos E
Universidade Federal da Bahia, Programa de Pós-Graduação em Zootecnia, Salvador, BA, Brazil.
Campus Garanhuns, Universidade Federal Rural de Pernambuco, Garanhuns, PE, Brazil.
An Acad Bras Cienc. 2020;92 Suppl 1:e20181374. doi: 10.1590/0001-3765202020181374. Epub 2020 Jul 3.
Diet supplementation with essential oil from sweet basil Ocimum basilicum (EOOB) can increase fish growth. So, this study aimed to evaluate the effect of EOOB in the diet on growth performance and plasmatic variables of pirarucu juveniles (Arapaima gigas) submitted to stressful condition (stocking density of 7.56 kg m-3per tank and limited space). Four diets (in triplicates) were evaluated with increasing levels of EOOB (0.0 control; 0.5; 1.0; and 2.0 mL kg diet-1) over 48 days. Linalool was the major constituent of EOOB (54.19%). The addition of 2.0 mL EOOB kg diet-1 improved final weight, weight gain, specific growth rate, condition factor and feed conversion ratio; it also decreased plasma urea levels and increased plasma albumin and total proteins levels. Plasma glucose, cortisol, and acid uric levels were not influenced by the addition of EOOB to the fish diet. In conclusion, the addition of 2.0 mL EOOBkg diet-1 is recommended for pirarucu juveniles, due to improved growth performance, and this supplementation did not compromise the homeostasis of fish rearing in a high stocking density.
用甜罗勒（Ocimum basilicum）精油（EOOB）进行日粮补充可以促进鱼类生长。因此，本研究旨在评估日粮中添加EOOB对处于应激状态（每箱放养密度为7.56 kg m-3且空间有限）的巨骨舌鱼幼鱼（Arapaima gigas）生长性能和血浆变量的影响。在48天的时间里，对四种日粮（每组设三个重复）进行了评估，日粮中EOOB的添加水平逐渐增加（0.0对照；0.5；1.0；和2.0 mL kg日粮-1）。芳樟醇是EOOB的主要成分（54.19%）。添加2.0 mL EOOB kg日粮-1可提高终末体重、增重、特定生长率、肥满度和饲料转化率；还可降低血浆尿素水平，提高血浆白蛋白和总蛋白水平。日粮中添加EOOB对血浆葡萄糖、皮质醇和尿酸水平没有影响。总之，建议在巨骨舌鱼幼鱼日粮中添加2.0 mL EOOB kg日粮-1，因为这可以改善生长性能，并且这种补充不会损害高密度养殖鱼类的体内平衡。
