Substituição da farinha de peixe pelo farelo de soja em dietas para juvenis co camarão branco, Litopenaeus vannamei, suplementadas com aminoácidos.

• Autor(a) principal: Silva, Natália Pereira
• Data de Publicação: 2019
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/50500
• topic: L. vannamei; cultivo de camarão; desempenho zooténico; ingrediente vegetal

In marine shrimp feeds, one of the main sources of protein is fishmeal. This work aimed to evaluate the zootechnical performance of juvenile shrimp L. vannamei. Initially, a basal diet containing 18.00% fishmeal (% of diet, as is basis) and 20.02% soybean meal was formulated. From the basal diet, three other diets were designed, reducing the dietary inclusion of fishmeal to 12, 6 and 0%. Diets were balanced to be isonitrogenous and isocaloric, with the supplementation of the crystalline amino acids DL-Methionyl-DL-Methionine, L-Lysine, L- Threonine, L-Tryptophan and L-Arginine. A total of 330 shrimp of 4.46 ± 0.73 g were transferred to 22 tanks of 61 L each at 75 shrimp/m2 (15 shrimp per tank). Shrimp were fed daily ad libitum at 08:20 am, 01:00 pm and 04:00 pm. After 93 days of rearing, water salinity, pH and temperature reached a mean (± SD) of 29 ± 4 g/L (n = 180), 7.2 ± 0.3 (n = 180) and 27,7 ± 0.6°C (n = 180). Final shrimp survival reached 87.0 ± 7.8% and was unaffected by dietary treatment. Shrimp fed the diet without fishmeal or with 100% substitution achieved a significantly lower final body weight (12.75 ± 0.68 g) compared to those fed other diets. However, no statistical difference was observed in the final body weight of shrimp when fishmeal was reduced by 67%. Gain in shrimp yield, apparent feed intake and feed conversion ratio reached a mean of 561 ± 65 g/m2, 19.7 ± 1.5 g/shrimp and 2.66 ± 0.35. It was not possible to detect statistical differences in parameters (P > 0.05). Results indicated it is possible to replace protein from fishmeal protein from soybean meal by 67% provided that the diets are adequately supplemented with crystalline amino acids, maintain a balance in other essential nutrients and in terms of palatability.