Zootecnia (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/28
Siglas das Coleções:
APP - Artigo Publicado em Periódico
ESO - Relatório de Estágio Supervisionado Obrigatório
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
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3 resultados
Resultados da Pesquisa
Item 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/8712824360632961The 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.Item Qualidade de ovos de poedeiras comercias alimentadas com dietas contendo aditivo simbiótico e armazenado sob refrigeração em diferentes tempos(2021-06-09) Ribeiro, Kalinina Machado; Rabello, Carlos Bôa Viagem; http://lattes.cnpq.br/4760288746238700; http://lattes.cnpq.br/5124661483020998The aim of this study was to evaluate the quality of eggs from commercial laying hens fed diets containing symbiotic additive and stored under refrigeration at different periods. One hundred and eighty eggs were collected soon after laying in a completely randomized experimental design in a 6x5 factorial scheme (diet x storage period 0, 7, 14, 21, 28), where 36 eggs were analyzed on the same day and the remaining 144 eggs were refrigerated. (±5.0°C). The variables analyzed were: egg weight (g), yolk color, albumen height (mm), albumen weight (g), yolk weight (g), shell weight (g), shell thickness (mm) , albumen pH and HU. Data were submitted to the Tukey test (p<0.05) and analyzed by the statistical process PROC MIX of the SAS 2018 statistical package. For the yolk color and albumen pH, a statistical effect was found (p<0.001) for the treatments and periods evaluated, with lower albumen pH in the reference treatment and on day 0, where in the other treatments and periods there was an increase in the pH of the albumen. Regarding the HU, the storage period significantly influenced (p<0.01) the values, where the effect of temperature became evident from the 7th day of storage, when the HU reduces, bringing changes in the internal quality of the eggs, but the eggs stored at refrigerated temperature, the quality remained even differing from day 0, where at 28 days of storage, they showed excellent quality pattern (AA). Thus, it is concluded that the longer the storage period, the lower the internal quality of the eggs, but when stored under refrigeration this effect can be minimized, in addition to zinc bacitracin and symbiotics, did not show relevant significant differences, and may the symbiotic being a replacement alternative for zinc bacitracin.Item Estágio Supervisionado Obrigatório realizado na granja Ovo Novo(2021-12-10) Andrade, Mariane Farias de; Rabello, Carlos Bôa Viagem; http://lattes.cnpq.br/4760288746238700; http://lattes.cnpq.br/4027425613630492