Desempenho e atividade de lipase em tilápias do Nilo

EnglishThe objective was to evaluate the effects of temperature on performance and activity of lipase in the Nile tilapia, Thai lineage. The experimental design was completely randomized with four treatments (20, 24, 28 and 32oC), six replicates and ten fishes per experimental unit. The diet was the same for all treatments. At 55 days of experiment were evaluated apparent feed intake, weight gain, apparent feed conversion, lipase activity and specific lipase activity. The apparent feed intake and weight gain increased linearly with temperature increase. For apparent feed conversion, quadratic effect was observed as a function of temperature, showing a conversion improvement of 1.79 to 1.00 with the increase of the temperature until 29,15oC. Linear effect in lipase and specific lipase activities was observed too as a result of temperature, comprising high lipase activity at 32oC. Water temperature influences the performance and amylase activity in Nile tilapia. portuguesObjetivou-se avaliar os efeitos da temperatu- ra no desempenho e na atividade de lipase de tilapias do Nilo, linhagem Tailandesa. O delineamento experimental foi inteiramente casualizado, com quatro tratamentos (20, 24, 28 e 32oC), seis repeticoes e 10 peixes por unidade experimental (aquario). Utilizou-se a mesma dieta para todos os tratamentos. Aos 55 dias do experimento foi avaliado o consumo de racao aparente, o ganho de peso, a conversao alimentar aparente, a atividade de lipase e a atividade especifica de lipase. O consumo de racao aparente e o ganho de peso aumentaram linearmente (p