23 documents found, page 1 of 3
Post-hatch fasting and infectious bronchitis vaccination affect growth, gastroi...
Fernandez-Alarcon,Miguel Frederico; Souza,Fernando Augusto de; Campos,Daniel Mendes Borges; Hada,Fabricio Hirota; Nogueira,Wedson Carlos LimaABSTRACT The influence of fasting and vaccination against infectious bronchitis (IB) on growth, gastrointestinal development, and morphometric parameters of the small intestine of newborn broiler breeders was investigated. Weight gain (WG), feed conversion ratio (FCR), gastrointestinal visceral growth, residual yolk sac, and morphometric parameters of the small intestine were measured in chicks aged up to 21 d....
Effects of glutamine on performance and intestinal mucosa morphometry of broile...
Luquetti,Brenda Carla; Alarcon,Miguel Frederico Fernandez; Lunedo,Raquel; Campos,Daniel Mendes Borges; Furlan,Renato Luís; Macari,MarcosABSTRACT This study aimed to assess the effects of glutamine as feed additive on performance and intestinal mucosa morphometry of broiler chickens vaccinated against coccidiosis. A total of 400 day-old male chicks were randomly assigned to four treatments (NVNG – no vaccination, no glutamine supplementation; NVG – no vaccination, glutamine supplementation (10 g kg−1); VNG – vaccination, no glutamine supplementa...
Energy and oil levels in broiler starter diets
Maiorka,Alex; Dahlke,Fabiano; Santin,Elizabeth; Bruno,Luis Daniel Giusti; Macari,MarcosThe feed intake and performance of the broilers fed with different levels of dietary energy in the starter diet to 21 days of age were evaluated. In Experiment 1 it was evaluated the performance of birds fed to 2,900 and 3,200kcal ME kg-1 diets, and the results show that ME intake was highest for birds 3,200kcal ME kg-1 on the 7th day of age. Feed intake (FI), weight gain (WG), and feed conversion (FC) were not...
Dietas de baixa proteína no desempenho de frangos criados em diferentes tempera...
Faria Filho,Daniel Emygdio de; Rosa,Paulo Sérgio; Figueiredo,Denise Fontana; Dahlke,Fabiano; Macari,Marcos; Furlan,Renato LuisO objetivo deste trabalho foi avaliar o desempenho de frangos, entre 42 e 49 dias, alimentados com dietas de baixa proteína e criados em diferentes temperaturas. Foram utilizados 360 frangos, machos, Cobb-500, distribuídos em um delineamento inteiramente ao acaso em esquema fatorial 3x3 (temperatura ambiente de 20, 25 e 32ºC e dietas com teores de proteína bruta de 18,0, 16,5 e 15,0%), com quatro repetições de ...
Hepatic mRNA expression and plasma levels of insulin-like growth factor-I (IGF-...
Giachetto,Poliana Fernanda; Riedel,Eduardo Correa; Gabriel,Jane Eyre; Ferro,Maria Inês Tiraboschi; Di Mauro,Sônia Marli Zingaretti; Macari,MarcosThe hepatic expression and plasma concentrations of IGF-I were investigated in three broiler chicken strains selected for different growth rates (HP-Hubbard-Pettersen, a fast growing strain; NN-Naked-neck, a strain with an intermediate growth rate and a heterozygous genotype, and C-Caipira, a slow growing crossbred strain). The chickens were studied at 1, 21 and 42 days of age and had free access to food throug...
Índice de previsão de produção de leite para vacas Jersey
Laloni,Luiz A.; Nääs,Irenilza A.; Macari,Marcos; Pereira,Danilo F.; Pinheiro,Maria Das G.No Brasil, o uso de vários modelos de criação intensiva e semi-extensiva desfavorece a adoção generalizada de métodos de manejo do gado bovino, principalmente do gado leiteiro. Mesmo assim, a produção leiteira pode ser melhorada a partir do uso de tecnologias que possam garantir o manejo adequado do rebanho. O objetivo deste trabalho foi desenvolver um índice de previsão de produção de leite para vacas Jersey e...
Use of scanning electron microscopy for the evaluation of intestinal epithelium...
Gomide Junior,Marcio Heber; Sterzo,Elton Vinícius; Macari,Marcos; Boleli,Isabel CristinaThis work reports the use of scanning electron microscopy to evaluate intestinal epithelium loss in broilers. Intestinal mucosa of male and female chicks submitted to prolonged period post-hatching of water and feed deprivation was evaluated. Two segments of the duodenum, jejunum and ileum were taken per bird, and routinely processed by scanning electron microscopy. Six distinct degrees of epithelium loss were ...
Polymorphism analysis of the hsp70 stress gene in Broiler chickens (Gallus gall...
Mazzi,Carmen Maria; Ferro,Jesus Aparecido; Ferro,Maria Inês Tiraboschi; Savino,Vicente José Maria; Coelho,Antonio Augusto Domingos; Macari,MarcosThe promoter region and the beginning of the coding region of the hsp70 stress gene were analysed in broiler chickens of a commercial breed (Hubbard-Pettersen), a breed selected for weight gain (PP1) and a non-selected breed (naked-neck Label Rouge). The naked neck gene (Naked neck, Na), which reduces feathering in birds and is thus related to heat resistance, was present in both PP1 and Label Rouge breeds. Gen...
Performance and hormonal profile in broiler chickens fed with different energy ...
Giachetto,Poliana Fernanda; Guerreiro,Erika Nomura; Ferro,Jesus Aparecido; Ferro,Maria Inês Tiraboschi; Furlan,Renato Luis; Macari,MarcosThe aim of this work was to investigate the influence of diet energy level on performance and hormonal profiles of broilers during post restriction period. It was a split-plot experiment, and the main treatments were in a 2x2 factorial scheme. Birds were fed restricted to 30% of the ad libitum intake, from 7 to 14 days of age. After the restriction period, birds were fed ad libitum with diets containing low (2,...
Efeito do uso de probiótico sobre o desempenho e atividade de enzimas digestiva...
Lima,Andréa Cristina Frizzas de; Pizauro Júnior,João Martins; Macari,Marcos; Malheiros,Euclides BragaO presente estudo foi realizado com o objetivo de pesquisar o desempenho e quantificar a atividade das enzimas digestivas: amilase, lipase e tripsina, dos frangos de corte submetidos a diferentes níveis de energia, na dieta, e a diferentes doses de probiótico na ração. Foram utilizados 360 pintos da linhagem Hubbard, alimentados com dietas contendo 2.900 e 3.200 kcal EM/kg, associadas com a adição de 0, 200 e 4...