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Your search keyword '"Silveira, Robson Mateus Freitas"' showing total 226 results
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226 results on '"Silveira, Robson Mateus Freitas"'

2. Do forage production and ingestive behavior of locally adapted sheep differ from an irrigated silvopastoral system to an irrigated monoculture in the semi-arid region?

Author

Alves, Genilson Cesar, Neto, Clemente Fernandes dos Santos, Silveira, Robson Mateus Freitas, Macedo, Vitor Hugo Maués, Vasconcelos, Elayne Cristina Gadelha, Pompeu, Roberto Cláudio Fernandes Franco, Costa, Hélio Henrique Araújo, Eufrásio, Ederson Gomes, McManus, Concepta, and Landim, Aline Vieira

Published
2024
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8. Carcass traits and morphometry, typification of the Longissimus dorsi muscle and non-carcass components of hair lambs: can biscuit bran completely replace corn? A machine learning approach

Author

Silveira, Robson Mateus Freitas, da Silva César, Luiz Fernando, de Sousa, Luiz Carlos Oliveira, Costa, Hélio Henrique Araújo, Vasconcelos, Elayne Cristina Gadelha, McManus, Concepta, Sarti, Danilo Augusto, Alves, Anderson Antonio Carvalho, and Landim, Aline Vieira

Published
2024
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19. Machine learning applied to understand perceptions, habits and preferences of lamb meat consumers in the Brazilian semi-arid region

Author

Silveira, Robson Mateus Freitas, Lima, Débora Fonteles, Camelo, Beatriz Veloso, McManus, Concepta, da Silva, Valdson José, Ferreira, Josiel, Costa, Hélio Henrique Araújo, dos Santos Dias, Carlos Tadeu, Contreras-Castillo, Carmen Josefina, Paveloski, Alessandro, De Vecchi, Laura Bertolaso, Sales, Arthur Pereira, Sarries, Gabriel Adrian, and Landim, Aline Vieira

Published
2023
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23. Genetic parameters for production, quality, and colors from eggs in Brazilian lineages of chickens

Author

Bogdanski, Fátima Auler, Silveira, Robson Mateus Freitas, Rovadoscki, Gregori Alberto, Franzo, Vamilton, Gervásio, Izally Carvalho, Escobar, Daysi Ylder Orzuza, Dauria, Brayan Dias, Meira, Ariana Nascimento, Mourão, Luciana Mangeti Barreto, Coutinho, Luiz Lehmann, Pizzolante, Carla Cachoni, de Moraes, José Evandro, and Mourão, Gerson Barreto

Published
2023
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29. Alternative additives associated in the feeding of laying hens: performance, biometrics, bone traits, and economic evaluation—an unsupervised machine learning approach

Author

Angelim, Angélica Maria, Leite, Silvana Cavalcante Bastos, de Farias, Maria Rogervânia Silva, Lourenço, Carla Lourena Cardoso Macedo, Evangelista, Angefferson Bento, Cordeiro, Carla Nágila, de Abreu, Cláudia Goulart, Freitas, Ednardo Rodrigues, and Silveira, Robson Mateus Freitas

Published
2023
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39. Tunnel-Ventilated Sheds with Negative Pressure Reduce Thermal Stress and Improve the Meat Quality of Broilers.

Author

Sakamoto, Karina Suemi, Silveira, Robson Mateus Freitas, Benincasa, Natália Cristina, Contreras Castillo, Carmen Josefina, Lobos, Cristian Marcelo Villegas, and Silva, Iran José Oliveira da

Subjects
*CHICKEN as food, *POSITIVE pressure ventilation, *TUNNEL ventilation, *POULTRY as food, *THERMAL stresses, *MEAT quality, *PECTORALIS muscle, *ERECTOR spinae muscles
Abstract

Simple Summary: Positive and negative pressure ventilation systems are widely used in poultry farming to control the internal environment of poultry houses, especially in tropical regions, in which hot and humid climates can pose challenges to the thermal regulation of animals. Knowing that thermal stress impacts the quality of animal meat, this study aimed to evaluate the thermal performance and quality of poultry meat in these two types of shed. The main results found here were that the negative pressure system presents lower temperatures and air enthalpy, and the animals reared in this system have better quality meat. We recommend the negative ventilation system for broiler producers in tropical regions due to its ability to provide better thermal indicators and chicken meat quality. This study aimed to evaluate the thermal performance and meat quality in broilers reared in positive pressure tunnel ventilation (PP) and negative pressure tunnel ventilation (NP) in production houses. 320 Cobb broilers (40 broilers per house) were used. Pectoralis major muscles from 40 broilers (10 broilers per house) were randomly selected and analysed for L* (lightness), a* (redness), b* (yellowness), pH, drip loss (DL), cooking loss (CL) and shear force (SF). Air temperature and humidity of the transportation and slaughterhouse waiting room were recorded in the last week of rearing. Subsequently, the enthalpy comfort index (ECI) was calculated. Air temperature and ECI were higher (p < 0.05) in positive pressure sheds, whereas relative humidity was higher (p < 0.001) in negative pressure sheds. There was no statistically significant difference between the enthalpy comfort index during transport and lairage (p > 0.005). Meat quality defects (high L*, DL, CL, SF) were found in PP and NP. It was observed that b* was higher in PP, although pH and CL were higher in NP. Differences in pH, b* and CL indicate that broilers from PP had a higher level of heat stress. In conclusion, differences in pH, b*value and cooking loss in breast broilers indicate that birds in PP had a higher level of heat stress. Additional studies investigating pre-slaughter handling methods to minimise injuries and heat stress are recommended in order to improve animal welfare and meat quality. [ABSTRACT FROM AUTHOR]

Published
2024
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49. Genealogical structure and genetic variability: A step towards conservation of white Morada Nova sheep in semi-arid region

Author

Sales, Daniel Caetano, de Sousa, José Ernandes Rufino, de Assunção, Marcos Aurelio Victor, Félix, Natanael Silva, do Nascimento, Bianca Ferreira, dos Santos, Wanderson Lucas Alves, de Araujo Noronha, Antonia Gessica Beatriz, Silveira, Robson Mateus Freitas, McManus, Concepta, and Façanha, Débora Andréa Evangelista

Published
2024
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50. Assessment of FecGE genotypes on reproductive traits in Brazilian Morada Nova and Santa Inês sheep.

Author

Pereira, Aysllan Harlley Rodrigues, Silveira, Robson Mateus Freitas, Carrara, Eula Regina, de Moraes Silva, Kleibe, Lobo, Raimundo Nonato Braga, de Faria, Danielle Assis, Caetano, Alexandre Rodrigues, Paiva, Samuel Rezende, and Landim, Aline Vieira

Abstract

The aim of this study was to evaluate the effect of the polymorphic FecGE allele on reproductive traits in Santa Inês and Morada Nova ewes. The traits evaluated were as follows: total progeny weights at birth (PWB) and weaning (PWW) and progeny survival rates at birth (PSRB) and weaning (PSRW). A total of 389 animals, belonging to two Santa Inês herds and one Morada Nova herd, were genotyped. There was a difference between the averages for all the traits studied regarding type of parturition, herd/breed, genotype/herd, and genotype/type of parturition. For each additional progeny, if the female was FecGE/E, the PWB decreased by 1.02 kg and the PWW by 3.16 kg, also with a 0.04% reduction in PSRB and no change in PSRW. If the female was FecGE/+, the reduction in PWB was 0.24 kg, with an increase in PSRW by 0.11%, but no change in PWW and PSRB. In general, these results demonstrate that FecG+/+ females have a better ability to increase their number of progenies without reducing PWB and PWW (also similar to FecGE/+). Thus, it is suggested that further studies on the association between the traits of interest and candidate genes in sheep should be carried out so that the regions which have the greatest effect on the expression of these traits are actually identified. It was not possible to verify the effect of the FecGE allele on the PWB, PWW, PSRB, and PSRW in these Morada Nova and Santa Inês herds. [ABSTRACT FROM AUTHOR]

Published
2023
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