Zootecnia (Sede)

Agora exibindo 1 - 7 de 7

Relatório de Estágio Supervisionado Obrigatório
(2024-09-23) Aquino, Nelina Aurora Lourenço de; Rabello, Carlos Bôa Viagem; http://lattes.cnpq.br/4760288746238700; http://lattes.cnpq.br/9869450957619196
Relatório de Estágio Supervisionado Obrigatório
(2024-08-02) Santos, Leanndra de Pádua Ferreira; Rabello, Carlos Bôa Viagem; http://lattes.cnpq.br/4760288746238700; http://lattes.cnpq.br/8712824360632961
Relatório de Estágio Supervisionado Obrigatório
(2024-03-04) Paz, Vinícius Guilherme Araujo da; Souza, Lilian Francisco Arantes de; http://lattes.cnpq.br/6015344715032401; http://lattes.cnpq.br/7180414475765717
Relatório de Estágio Supervisionado Obrigatório
(2024-03-05) Wilarins, Eric Alexandre Araujo; Rabello, Carlos Bôa Viagem; http://lattes.cnpq.br/4760288746238700; http://lattes.cnpq.br/4863920854475665
Características ósseas para estimar a ingestão de manganês complexado a aminoácidos para aves de postura fase de cria
(2024-02-28) Lima, Stephany Debora Vila Bela de; Souza, Lilian Francisco Arantes de; Wanderley, Jamille Sheila da Silva; http://lattes.cnpq.br/4706720624276029; http://lattes.cnpq.br/6015344715032401; http://lattes.cnpq.br/8296739801125452
Inorganic mineral sources have lower bioavailability and are commonly supplemented in excess in bird feed to meet requirements, while organic sources are more bioavailable and are included in smaller quantities in the diet. The present study aimed to estimate the ideal intake of manganese complexed with amino acids in the diet of laying hens during the rearing phase using bone variables. 720 Dekalb White chicks aged 1 to 6 weeks were used and distributed in a completely randomized design (DIC) in 6 treatments with 6 replications of 20 birds each. The treatments consisted of isonutritive and isoenergetic diets with levels of complexed manganese inclusion at 25, 37, 49, 61, 73 and 85 mg/kg. At the end of the experimental period, both tibias were collected from 1 bird per experimental plot. To evaluate bone variables, the following were measured and used: bone strength, densitometry (proximal, medial and distal), mineral matter and Seedor index of the tibias. The bone variables obtained were subjected to multivariate data analysis, with multivariate analysis of variance being performed, then the data were subjected to principal component analysis (PCA) and correlation matrix, and based on the results, the variables were subjected to linear and non-linear regression models to estimate the ideal intake of manganese complexed with amino acids for the breeding phase. According to the results of ANOVA and MANOVA and according to PCA, distal densitometry is the most relevant bone variable to make the estimate. The ideal intake of manganese complexed with amino acids was calculated using the models: MnCAA = Rmax.x/(km+x) and MnCAA = - r+ln((-y-Rmin-amp/y-Rmin)/s), and From the inversion of the models, an estimated consumption of 1,767 mg/bird/day of MnCAA was generated for the maximum response of medial tibial densitometry.
Efeito do peso corporal de poedeiras na fase de pós-pico sobre o desempenho, qualidade dos ovos e indicadores de bem-estar
(2024-02-28) Santos, Leanndra de Pádua Ferreira; Souza, Lilian Francisco Arantes de; Silva, Webert Aurino da; http://lattes.cnpq.br/7409325762363597; http://lattes.cnpq.br/6015344715032401; http://lattes.cnpq.br/8712824360632961
The objective of this work was to evaluate the effect of body scores of laying hens in the post-peak phase on performance, egg quality and welfare indicators. We used 90 Dekalb White layers aged 60 to 72 weeks distributed in a completely randomized design in 3 treatments composed of different body weights of the birds (light, medium and heavy) with 6 replications of 5 birds each. Bird performance was evaluated through egg production (%), feed consumption (g), feed conversion (g/g) and egg mass (g). Egg quality was assessed using egg weight (g), yolk color, albumen height (mm), Haugh Unit, shell strength, yolk height and diameter (mm) and yolk index by an automatic analyzer. of eggs. Animal welfare was assessed using indicators from the Welfare Quality protocol for laying hens (keel injuries, skin injuries, crest injuries, foot pad injuries). The data obtained on the performance and quality variables of the eggs were subjected to analysis of variance, and when found to be significant, the Tukey test was performed at 5% significance. Well-being indicators were subjected to the chi-square test at 5% significance. Feed consumption for heavy birds was higher, followed by medium birds and lower for light birds. Heavier eggs were observed in medium and heavy birds compared to light ones. Medium birds had greater egg mass compared to heavy ones, not differing from light ones. Heavy birds showed worse conversion per egg mass compared to light and medium birds, which did not differ from each other. Medium and heavy birds produced heavier eggs when compared to light ones, despite having lighter eggs, birds with lower body weight produced eggs with heavier yolks. The albumen height was more pronounced in light and medium birds, the yolk index was higher in light birds while the yolk color was more pigmented in medium birds. Shell strength was worse in heavy birds. There was no significant effect of body weight on well-being indicators related to the skin, ridge and footpad. However, heavy birds had a higher frequency of keel fractures compared to light and medium birds. With this, it is concluded that the control of body weight and uniformity in batches of laying hens is necessary, especially in relation to the increase in weight of birds in relation to the standard, since the greatest losses to performance, egg quality and well-being of birds were observed in heavy birds.
Estágio Supervisionado Obrigatório
(2024-03-04) Carvalho, Edneide Mayara de Lima; Porto Neto, Fernando de Figueiredo; http://lattes.cnpq.br/1475750525654086; http://lattes.cnpq.br/8070590961801150

Zootecnia (Sede)

Navegar

Filtros

Configurações

Ordenar por

Resultados por página

Resultados da Pesquisa