Banca de DEFESA: CARLOS HENRIQUE DA PAIXÃO LEMOS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : CARLOS HENRIQUE DA PAIXÃO LEMOS
DATE: 25/03/2024
TIME: 09:00
LOCAL: videoconferência
TITLE:

EFEITOS DA SUPLEMENTAÇÃO DIETÉTICA DE ZINCO E SELÊNIO QUELATADO NO DESEMPENHO E METABOLISMO DE JUVENIS DE TILÁPIA DO NILO (Oreochromis niloticus)

KEY WORDS:

Aspartate aminotransferase, biomass, erythrogram, weight gain, metabolism, oreochromis niloticus

PAGES: 81
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Produção Animal
SUMMARY:

The objectives of this study were: 1. To evaluate in the effects on growth and health in the Nile tilapia supplemented with gradual levels of amino acids (ZN-AA) and subjected to transport stress and 2. zinc-supplementation- L-SELENNINE (ZNSEMET) and subjected to low and high storage density in the first experiment, nile tilapia individuals (21.78 ± 0.17 g; n = 12 fish per tank; storage density of 1.045 kg-3) They were fed 0, 25, 50, 75 or 100 mg zn-aa kg-1 (equivalent to 77.49, 102.69, 127.89, 153.09 or 178.29 mg zn kg-1) in extruded diets (280 g kg-1 of digestible protein; isoprotheic and isocaloric) for 60 days. At the end of the experimental period, after assessment of performance measures, the fish were carried by car by 3 hours in plastic packaging, and later blood collection was performed. Linear regression showed that the best performance value (final weight, final biomass, weight gain, specific growth rate and food consumption) was found in 100 mg zn-a kg diet-1 (p <, p <, 05). Increased ZN-AA in the diet has linearly increased plasma levels of triglycerides, hemoglobin, medium corpuscular hemoglobin and leukocyte values and reduced plasma levels of total protein, cholesterol (total and LDL) and aspartate aminotransferase (p <0.05) . According to quadratic regression, the highest values of plasma glucose and Alanine aminotransferase were found in the control group (p <0.05). In the second experiment, four extruded diets were formulated, where gradual levels of Znset were added to the basal diet at 0, 0.5, 1.0 and 2.0 mg kg-1 for fish grown fish (RAS) fish Lower (BDE) (15 fish-1 or 4.35 kg m-3) and high (ADE) (45 fish-1 or 13.05 kg m-3). The sample design was fully randomized, with eight treatments (four levels of znsemet x two of) and four repetitions. The fish were fed to the apparent satiety three times a day and kept in 250 L tanks for 65 days. Zootechnical, biochemical and hematological parameters and body composition were evaluated. The best results for growth performance occurred in BDE and 1.0 or 2.0 mg znsemet kg diet-1 (p <0.05) treatments. The final biomass was higher in ade treatments (p <0.05). Food conversion rate and body composition (gross protein, ethereal extract, gray and gross energy) did not differ between treatments. In the interaction between BDE and 1.0 mg znsemet kg diet-1, there was an increase in total protein and cholesterol levels and reduction of aspartate aminotransferase (AST) activity in plasma (p <0.05). The highest values for albumin, glucose, triglycerides and cholesterol in plasma, erythrocytes, hemoglobin, hematocrit and medium corpuscular volume and the lowest values for medium corpuscular hemoglobin concentration were observed in BDE -kept fish (p <0.05). It is concluded that, under the conditions of this study, 100 mg zn-aa kg diet-1 is recommended for Nile tilapia, as it can improve its growth, metabolism, physiology and immunity. And for Nile tilapia cultivated in ras, an ADE should be avoided and, with a BDE, the addition to the 1.0 mg znsemet kg - 1 diet is recommended, as it improved growth performance, did not change the erythrogram, increased the Metabolism and reduced the AST activity of fish plasma.

COMMITTEE MEMBERS:
Presidente - 1913950 - CARLOS EDUARDO COPATTI
Interna - 1836947 - GEOVANA DOTTA TAMASHIRO
Externo à Instituição - LUIS GUSTAVO TAVARES BRAGA - UESC-BA
Externa à Instituição - RENILDE CORDEIRO DE SOUZA - IFBaiano
Externo à Instituição - FELIPE BARBOSA RIBEIRO