Dissertação
Oleo essencial de Nectandra grandiflora na dieta de jundiá (Rhamdia quelen) antes e depois da hipóxia: estresse oxidativo e desempenho zootécnico
Fecha
2021-02-12Autor
Descovi, Sharine Nunes
Institución
Resumen
In the current scenario, the use of prophylactics based on natural products has been
growing due to their biodegradable potential and lower risk of toxicity to animals and
the environment. Studies prove that essential oils have positive effects on
development, through improvements in physiological, metabolic, antioxidant,
immunological levels and even in the zootechnical performance of some species of
fish when added to the diet. The aim of this study was to evaluate the effect of adding
the essential oil of Nectandra grandiflora (OENG) to the diet of young jundiás and its
relationship to the growth and pro and antioxidant parameters of this species during
hypoxia and reoxygenation. 225 young jundiás (0.92 ± 20 g; 4.42 ± 50 cm) received a
diet supplemented with OENG in the proportions: 0; 0.5; 1.0; 1.5 and 2.0 mL/kg of feed
for 60 days and subsequently submitted to hypoxia for 8 hours and reoxygenation for
2 hours. Water quality parameters were monitored and maintained at levels acceptable
for the species until the time of hypoxia (dissolved oxygen: 2 mg/L). Samples of liver,
muscle and gills were collected, as well as measures of weight and length of the
animals for further metabolic and performance analysis, respectively. Regarding the
zootechnical performance, the tested OENG levels did not significantly alter the growth
of the fish. Regarding stress due to hypoxia and reoxygenation, the tested OENG
levels did not show an antioxidant effect compared to the parameters evaluated.