Resumo -O objetivo deste trabalho foi avaliar o desempenho de bezerros mestiços, aleitados com soro de queijo em associação ao colostro. Foram utilizados 24 bezerros Holandês x Zebu, distribuídos em delineamento inteiramente casualizado, com três tratamentos e oito repetições. Os tratamentos consistiram de: leite integral, 50% de leite integral + 50% de soro de queijo, e 30% de colostro + 70% de soro de queijo. O desenvolvimento dos bezerros foi avaliado até os 60 dias de idade, por meio de pesagens semanais e mensurações corporais. Para a estimativa de consumo, foram feitas medições diárias de consumo da dieta sólida, pelo método oferta/ sobra. O desempenho econômico foi avaliado pelo cálculo de indicadores de custos e receitas, e de medidas de resultados econômicos. Não houve influência da dieta líquida sobre o consumo de matéria seca e sobre as médias de medidas corporais dos bezerros. Foram observadas diferenças significativas no ganho de peso dos animais na segunda e na quarta semanas de vida. A dieta com colostro apresentou o maior lucro adicional em comparação ao tratamento controle. A associação do soro de queijo ao colostro é a opção mais vantajosa economicamente, já que a substituição de 100% do leite por esses subprodutos não prejudicou o desempenho dos animais.Termos para indexação: avaliação econômica, bezerros mestiços, consumo de matéria seca, desenvolvimento ponderal, sucedâneo. Performance of calves fed cheese whey associated with colostrumAbstract -The objective of this work was to evaluate the performance of crossbred calves fed cheese whey, in association with colostrum. Twenty-four Holstein x Zebu calves, distributed in a completely randomized block design, with three treatments and eight replicates, were used. The treatments consisted of: whole milk; 50% whole milk + 50% cheese whey; and 30% colostrum + 70% cheese whey. The development of calves was evaluated until 60 days of age by weekly weighing and body measurements. To estimate consumption, daily measurements of solid diet consumption were done by the supply/spare method. Economic performance was evaluated by calculating indicators of costs and revenues, and measurements of economic outcomes. There was no influence of liquid diet on dry matter intake and on average body measurements of calves. Significant differences were found in animal weight gain in the second and in the fourth weeks of life. The diet containing colostrum showed the highest additional profit when compared to the control treatment. The association of cheese whey and colostrum is the most economically advantageous option in the liquid diet of crossbred calves, since the substitution of 100% of the milk by these byproducts did not harm the performance of animals.Index terms: economic evaluation, crossbred calves, dry matter intake, weight development, milk replacer. IntroduçãoA pecuária de leite é considerada atividade de baixa rentabilidade por apresentar altos custos de produção em relação aos preços de venda, baixa produtividade por animal e por área, e pequenos vol...

The objective of this study was to evaluate the effect of the inclusion of canola and coconut oils to diets of European quail (Coturnix coturnix) over performance and carcass yield. One hundred and ninety-two quail (eight-days old) were randomly allocated to four dietary treatments with six replicates of eight birds each. The treatments were arranged in a factorial 2×2 scheme with two sources of dietary oil containing two levels of canola and coconut oils (1 and 2%). For performance variables, the final weight was evaluated, and the carcass variables were feed intake, weight gain, and feed conversion. A significant difference was observed between treatments for feed intake, with the inclusion of 2% canola oil providing higher intake. There was also significant effect for carcass characteristics on weight at fasting, eviscerated carcass, liver and gizzard weights, as well as liver, heart, and gizzard yields. The inclusion of vegetable oil such as canola and coconut oils in diets for European quail at the levels of 1 and 2% can be performed with no negative effect on performance from 8 to 42 days of age.

No abstract