Fitogênicos na alimentação de tilápias do Nilo (Oreochromis niloticus): saúde e desempenho produtivo

Abstract

The study aimed to evaluate the effects of phytogenic additives on the health and performance of Nile tilapia (Oreochromis niloticus) at different stages of development. Two experimental trials were conducted using fry and juveniles, testing the addition of Quillaja saponaria extract (QSE), Vitis vinifera grape extract (GE) and a combination of Quillaja saponaria extract and anise essential oil (QSA) compared to a control group with no added natural products. The use of the phytogenics led to higher hematocrit levels, indicating an increased oxygen transport capacity and stress response. These additives also showed potential immunomodulatory effects, as evidenced by changes in monocyte levels. In addition, the additives influenced intestinal morphology, with variations in villus height and crypt depth, suggesting better nutrient absorption. The results suggest that the inclusion of phytogenic additives in Nile tilapia diets can offer health benefits and potentially improve performance. However, the response varies depending on the specific additive and the dose used.