The present study aimed at evaluating the productive performance of Leporinus macrocephalus fed with different levels of inclusion of poultry viscera meal replacing fish meal. The experiment was conducted in a stove located in the Universidade Estadual do Oeste do Paraná during 45 days. We used 200 fish with average initial length of 4.7 ± 0.37 cm and average initial weight of 1.407 ± 0.03 g, distributed in 20 net-cages. The experimental design was randomized with five treatments and five replicates with five levels of replacement of fish meal by poultry viscera meal (0, 25, 50, 75, 100%). The parameters evaluated were the productive performance and the chemical composition of animals. The inclusion of poultry viscera meal in the substitution of fish meal in the feeding of Leporinus macrocephalus can be used without impairing the performance of the animals
ResumoNo experimento objetivou-se avaliar o desempenho produtivo e a composição bromatológica de alevinos de tilápias-do-nilo, alimentados com dietas contendo diferentes fontes lipídicas vegetais. Foram utilizadas 320 tilápias com peso e comprimento total médio de 2,55±0,57 g e 5,59±0,43 cm, respectivamente, por um período de 60 dias, em um delineamento em blocos casualizados com oito tratamentos e quatro repetições. Os tratamentos consistiram no fornecimento de dietas enriquecidas com oito diferentes tipos de óleos vegetais: girassol, canola, gergelim, linhaça, amendoim, castanha-do-pará, soja e macadâmia com inclusão de 4% na ração. O arraçoamento foi realizado quatro vezes ao dia, até a saciedade aparente. Os parâmetros zootécnicos avaliados foram ganho de peso, conversão alimentar aparente, consumo de ração e sobrevivência. Não foram observadas diferenças significativas (P>0,05) entre as variáveis de desempenho produtivo. Foram observadas distinções (P<0,05) nos teores de umidade, proteína bruta e lipídios totais na composição centesimal após os 30 e 60 dias de experimento. O teor de cinzas somente apresentou diferença significativa (P<0,05) aos 60 dias. As fontes lipídicas utilizadas são eficientes na dieta oferecida para tilápias-do-nilo, não influenciando no desempenho produtivo. Palavras-chave: lipídios, nutrição de peixes, Oreochromis niloticus. AbstractIn the experiment aimed to evaluate the productive performance and the chemical composition of Nile tilapia fingerlings fed with diets containing different lipid sources vegetables. Were used 320 tilapias with weight and total length of 2.55±0.57g and 5.59±0,43cm, respectively, for a period of 60 days, in a randomized blocs design with eight treatments and four replicates. Treatments consisted in providing diets enriched with eight different types of vegetable oils: sunflower, canola, sesame, linseed, peanut, Brazil nuts, soy and macadamia with inclusion of 4% in the diet. The feeding was carried out four times a day until the apparent satiation. The productive performance parameters evaluated were weight gain, feed conversion, feed intake and survivor. There were no significant differences (P>0.05) between the variables of productive performance. Distinctions were observed (P<0.05) in moisture, crude protein and total lipids to the chemical composition after 30 and 60 days of experiment. The ash content only significant difference (P<0.05) at 60 days. The lipids sources used are efficient in the diets offered to Nile tilapia, without influence on growth performance. Keywords: lipids, nutrition of fish, Oreochromis niloticus. IntroduçãoA tilápia do Nilo Oreochromis niloticus, originária dos países africanos, apresenta ausência de espinhos musculares em "Y" e rendimento de 35 a 40% de filé em exemplares de peso comercial de 450g, tem ótima aceitação no mercado consumidor principalmente pelas características organolépticas de seu filé, e é bastante apreciada nos pesque-pagues .Segundo Marengoni (2006), na última década a tilápia foi o peixe de maior expres...
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