All Stories

  1. Effects of Fat Supplementation on Growth Performance and Blood Biochemical Parameters in Dairy Calves During Pre- and Post-Weaning Phases

    Article • Dairy, December 2025, MDPI AG

    Ricardo Vieira

  2. Advances in Lignocellulose-Degrading Enzyme Discovery from Anaerobic Rumen Fungi

    Article • Microorganisms, December 2025, MDPI AG

    Ricardo Vieira

  3. Effects of propionic acid inclusion and ensiling time on in situ ruminal starch degradability of high-moisture flint corn grain silage

    Article • Journal of Dairy Science, September 2025, American Dairy Science Association

    Ricardo Vieira

  4. Impact of Feed Composition on Rumen Microbial Dynamics and Phenotypic Traits in Beef Cattle

    Article • Microorganisms, January 2025, MDPI AG

    Ricardo Vieira

  5. Modeling complex systems in animal science: A pedagogical framework for new researchers

    Article • Revista Brasileira de Zootecnia, January 2025, Revista Brasileira de Zootecnia

    Ricardo Vieira

  6. The role of artificial intelligence in Latin American ruminant production systems

    Article • Animal Frontiers, December 2024, Oxford University Press (OUP)

    Ricardo Vieira

  7. Modeling microbial growth based on time-dependent kinetic mechanisms of digestion and passage in the ruminoreticulum

    Article • Animal Feed Science and Technology, December 2024, Elsevier

    Ricardo Vieira

  8. Carbon Mineralization in Soil Aggregate Classes Under Leguminous Tree Planting in North Fluminense, Brazil

    Article • Floresta e Ambiente, January 2024, FapUNIFESP (SciELO)

    Ricardo Vieira

  9. Parâmetros de fermentação in vitro de palha de braquiária processada ou não processada e subprodutos do processamento de batata e mandioca

    Article • Semina Ciências Agrárias, December 2023, Universidade Estadual de Londrina

    Ricardo Vieira

  10. Standardization of processing parameters and color of gels aiming to replace citric pectin by mesocarp flour or pectin of passion fruit

    Article • Acta Scientiarum Technology, September 2023, Universidade Estadual de Maringa

    Ricardo Vieira

  11. O25 Particle sizes in feces of lactating ewes fed on diets made of fine, medium, and coarse hay

    Article • Animal - science proceedings, July 2023, Elsevier

    Ricardo Vieira

  12. Forages and Pastures Symposium: revisiting mechanisms, methods, and models for altering forage cell wall utilization for ruminants

    Article • Journal of Animal Science, January 2023, Oxford University Press (OUP)

    Ricardo Vieira

  13. 199 Revisiting Mechanisms, Methods, and Models for Altering Cell Wall Utilization for Ruminants

    Article • Journal of Animal Science, September 2022, Oxford University Press (OUP)

    Ricardo Vieira

  14. 53. Nonlinearities in intake and fecal output of major nutrients as functions of fiber intake rate in steers fed on corn silage-based diets

    Article • Animal - science proceedings, September 2022, Elsevier

    Ricardo Vieira

  15. 89. Nonlinear parameter estimation: theory and application with SAS and R

    Article • Animal - science proceedings, September 2022, Elsevier

    Ricardo Vieira

  16. Polymorphism in the BIEC2-808543 locus and its association with growth curve in Brasileiro de Hipismo horse breed

    Article • Revista Brasileira de Zootecnia, January 2021, Revista Brasileira de Zootecnia

    Ricardo Vieira

  17. A two-location trial for selecting corn silage hybrids for the humid tropic: forage and grain yields and in vitro fermentation characteristics

    Article • Revista Brasileira de Zootecnia, January 2021, Revista Brasileira de Zootecnia

    Ricardo Vieira

  18. Effects of source and concentration of neutral detergent fiber from roughage in beef cattle diets on feed intake, ingestive behavior, and ruminal kinetics

    Article • Journal of Animal Science, May 2020, Oxford University Press (OUP)

    Ricardo Vieira

  19. Effects of source and concentration of neutral detergent fiber from roughage in beef cattle diets: Comparison of methods to measure the effectiveness of fiber

    Article • Journal of Animal Science, May 2020, Oxford University Press (OUP)

    Ricardo Vieira

  20. Comparing the effectiveness of different roughage sources in Brazilian cattle feed

    Article • Journal of Animal Science, May 2020, Oxford University Press (OUP)

    Ricardo Vieira

  21. The transit of external markers throughout the ruminant digestive tract: 1. The fitting quality of models to marker profiles in feces using an information-theoretic approach

    Article • Animal Feed Science and Technology, March 2020, Elsevier

    Ricardo Vieira

  22. The transit of external markers throughout the ruminant digestive tract: 2. The estimation of fiber digestibility, ruminoreticular fill, and related biases

    Article • Animal Feed Science and Technology, March 2020, Elsevier

    Ricardo Vieira

  23. The geometry of the lactation curve based on Wood's equation: a two-step prediction

    Article • Revista Brasileira de Zootecnia, January 2020, Revista Brasileira de Zootecnia

    Ricardo Vieira

  24. UENF MSV2210 and UENF MS2208: Silage and green maize hybrids for Rio de Janeiro State, Brazil

    Article • Crop Breeding and Applied Biotechnology, January 2020, FapUNIFESP (SciELO)

    Ricardo Vieira

  25. Synthesis and role of melanin for toleratingin vitrorumen digestion inDuddingtonia flagrans, a nematode-trapping fungus

    Article • Mycology&#58 An International Journal on Fungal Biology, June 2019, Tsinghua University Press

    Prof. Fabio Lopes Olivares, Ricardo Vieira

  26. Ingestive behavior of dairy goats fed diets containing increasing levels of neutral detergent fiber and particle size using multivariate analysis

    Article • Acta Scientiarum Animal Sciences, June 2019, Universidade Estadual de Maringa

    Ricardo Vieira

  27. Genetic improvement of silage maize: predicting genetic gain using selection indexes and best linear unbiased prediction

    Article • Revista Ciência Agronômica, January 2019, GN1 Genesis Network

    Ricardo Vieira

  28. On the specificity of different methods for neutral detergent fiber and related problems

    Article • Animal Feed Science and Technology, June 2018, Elsevier

    Ricardo Vieira

  29. First record of the nematode Libyostrongylus dentatus Hoberg, Lloyd & Omar, 1995 (Trichostrongylidae) in ostriches (Struthio camelus Linnaeus, 1758) (Struthionidae) outside the Americas

    Article • Parasites & Vectors, April 2018, Springer Science + Business Media

    Ricardo Vieira

  30. Modeling the respiration rate of Golden papayas stored under different atmosphere conditions at room temperature

    Article • Postharvest Biology and Technology, February 2018, Elsevier

    Ricardo Vieira

  31. The ontogenetic allometry of body morphology and chemical composition in dairy goat wethers

    Article • animal, August 2017, Cambridge University Press

    Ricardo Vieira

  32. Degradability and kinetics of fibrous particles in cattle fed diets based on corn silage and concentrates with or without addition of lipids

    Article • Revista Brasileira de Zootecnia, December 2016, FapUNIFESP (SciELO)

    Ricardo Vieira

  33. Accessing marker effects and heritability estimates from genome prediction by Bayesian regularized neural networks

    Article • Livestock Science, September 2016, Elsevier

    Ricardo Vieira

  34. Performance and metabolite profile of dairy cows fed tropical grasses and concentrates containing crude protein with low or high degradability

    Article • Revista Brasileira de Zootecnia, September 2016, FapUNIFESP (SciELO)

    Ricardo Vieira

  35. Kinetics of digestion of low-quality forage grazed by beef cattle fed supplements containing increasing levels of rumen undegradable protein

    Article • Revista Brasileira de Zootecnia, January 2016, FapUNIFESP (SciELO)

    Ricardo Vieira

  36. Serine proteases activity is important for the interaction of nematophagous fungus Duddingtonia flagrans with infective larvae of trichostrongylides and free-living nematodes Panagrellus spp.

    Article • Fungal Biology, August 2015, Elsevier

    Ricardo Vieira

  37. Long-term growth of body, body parts and composition of gain of dairy goat wethers

    Article • The Journal of Agricultural Science, July 2015, Cambridge University Press

    Ricardo Vieira

  38. Corrigendum to “Application of a nonlinear optimization tool to balance diets with constant metabolizability” [Livest. Sci. 158 (1–3) (2013) 106–117]

    Article • Livestock Science, March 2015, Elsevier

    Ricardo Vieira

  39. Fitting mathematical models to lactation curves from holstein cows in the southwestern region of the state of Parana, Brazil

    Article • Anais da Academia Brasileira de Ciências, March 2015, FapUNIFESP (SciELO)

    Ricardo Vieira

  40. Intake and performance simulation of goats fed exclusively tifton 85, mulberry or leucaena

    Article • Bioscience Journal, January 2015, EDUFU - Editora da Universidade Federal de Uberlandia

    Ricardo Vieira

  41. Traditional and biphasic nonlinear models to describe the growth of goat kids of specialized dairy breeds

    Article • Small Ruminant Research, January 2015, Elsevier

    Ricardo Vieira

  42. Using the Small Ruminant Nutrition System to develop and evaluate an alternative approach to estimating the dry matter intake of goats when accounting for ruminal fiber stratification

    Article • Journal of Dairy Science, November 2014, American Dairy Science Association

    Ricardo Vieira

  43. Assessment of the heterogeneous ruminal fiber pool and development of a mathematical approach for predicting the mean retention time of feeds in goats1

    Article • Journal of Animal Science, March 2014, Oxford University Press (OUP)

    Ricardo Vieira

  44. <italic>Clitoria ternatea</italic> L. as a Potential High Quality Forage Legume

    Article • Asian-Australasian Journal of Animal Sciences, February 2014, Asian Australasian Association of Animal Production Societies

    Ricardo Vieira

  45. Population dynamics of Libyostrongylus dentatus and L. douglassii of ostriches raised in the Northern Rio de Janeiro State, Brazil

    Article • Veterinary Parasitology, February 2014, Elsevier

    Ricardo Vieira

  46. Variação das massas de gordura e proteína corporal e dos órgãos viscerais de cabras Alpinas nos 60 dias de lactação

    Article • Revista Brasileira de Saúde e Produção Animal, December 2013, FapUNIFESP (SciELO)

    Ricardo Vieira

  47. Application of a nonlinear optimization tool to balance diets with constant metabolizability

    Article • Livestock Science, December 2013, Elsevier

    Ricardo Vieira

  48. A new approach about the digestion of fibers by ruminants

    Article • Revista Brasileira de Saúde e Produção Animal, June 2013, FapUNIFESP (SciELO)

    Ricardo Vieira

  49. Heterogeneity of the digestible insoluble fiber of selected forages in situ

    Article • Animal Feed Science and Technology, February 2012, Elsevier

    Ricardo Vieira

  50. Estimates of kinetic degradability parameters and passage of materials originated from intercropping of brachiaria grass and corn and soybean crops

    Article • Revista Brasileira de Zootecnia, December 2011, FapUNIFESP (SciELO)

    Ricardo Vieira

  51. A model for evaluating beef cattle rations considering effects of ruminal fiber mass

    Article • Revista Brasileira de Zootecnia, November 2011, FapUNIFESP (SciELO)

    Ricardo Vieira

  52. Development and evaluation of empirical equations to predict ruminal fractional passage rate of forages in goats

    Article • The Journal of Agricultural Science, July 2011, Cambridge University Press

    Ricardo Vieira

  53. Body composition and net requirements of protein and energy for weight gain of Nellore and crossbreed steers finished under grazing

    Article • Revista Brasileira de Zootecnia, April 2011, FapUNIFESP (SciELO)

    Ricardo Vieira

  54. Desempenho de novilhos mantidos em pastagens de capim-elefante e capim-mombaça

    Article • Revista Brasileira de Zootecnia, February 2011, FapUNIFESP (SciELO)

    Ricardo Vieira

  55. Vícios na estimação da excreção fecal utilizando indicadores internos e óxido crômico em ensaios de digestão com ruminantes

    Article • Revista Brasileira de Zootecnia, October 2009, FapUNIFESP (SciELO)

    Ricardo Vieira

  56. Energetic efficiency of protein and body fat retention in crossbred Bos indicus and Bos Taurus × Bos indicus raised under tropical conditions

    Article • Revista Brasileira de Zootecnia, August 2009, FapUNIFESP (SciELO)

    Ricardo Vieira

  57. Dairy goat husbandry amongst the household agriculture: herd and economic indexes from a case study in Rio de Janeiro, Brazil

    Article • Revista Brasileira de Zootecnia, January 2009, FapUNIFESP (SciELO)

    Ricardo Vieira

  58. A generalized compartmental model to estimate the fibre mass in the ruminoreticulum: 1. Estimating parameters of digestion

    Article • Journal of Theoretical Biology, December 2008, Elsevier

    Ricardo Vieira

  59. A generalized compartmental model to estimate the fibre mass in the ruminoreticulum: 2. Integrating digestion and passage

    Article • Journal of Theoretical Biology, December 2008, Elsevier

    Ricardo Vieira

  60. Characteristics of the dairy goat primary sector at the Rio de Janeiro State, Brazil

    Article • Revista Brasileira de Zootecnia, April 2008, FapUNIFESP (SciELO)

    Ricardo Vieira

  61. Avaliação de sistemas de produção de caprinos leiteiros na Região Sudeste do Brasil

    Article • Revista Brasileira de Zootecnia, February 2008, FapUNIFESP (SciELO)

    Ricardo Vieira

  62. Avaliação nutricional da grama-estrela cv. Africana para vacas leiteiras em condições de pastejo

    Article • Revista Brasileira de Zootecnia, February 2008, FapUNIFESP (SciELO)

    Ricardo Vieira

  63. Desempenho ponderal de novilhas mestiças Holandês × Zebu submetidas a duas estratégias de suplementação mineral

    Article • Revista Brasileira de Zootecnia, February 2008, FapUNIFESP (SciELO)

    Ricardo Vieira

  64. Avaliação do perfil nictemeral de excreção de indicadores internos e de óxido crômico em ensaios de digestão com ruminantes

    Article • Revista Brasileira de Zootecnia, December 2007, FapUNIFESP (SciELO)

    Ricardo Vieira

  65. Exigência de energia de mantença e composição corporal e do ganho de vacas de corte adultas de três grupos genéticos confinadas

    Article • Revista Brasileira de Zootecnia, December 2007, FapUNIFESP (SciELO)

    Ricardo Vieira

  66. Exigência de lisina para codornas japonesas (Coturnix japonica) na fase de cria

    Article • Ciência e Agrotecnologia, August 2007, FapUNIFESP (SciELO)

    Ricardo Vieira

  67. Evaluation of acid detergent insoluble protein as an estimator of rumen non-degradable protein in tropical grass forages

    Article • Arquivo Brasileiro de Medicina Veterinária e Zootecnia, August 2006, FapUNIFESP (SciELO)

    Ricardo Vieira

  68. Composição corporal e exigências de energia de mantença em bovinos Nelore, puros mestiços, em confinamento

    Article • Revista Brasileira de Zootecnia, June 2006, FapUNIFESP (SciELO)

    Ricardo Vieira

  69. Avaliação de marcadores e modelos matemáticos para o estudo das cinéticas de trânsito e de degradação ruminal em novilhos mantidos em pastagem de capim-braquiária (Brachiaria decumbens Stapf.)

    Article • Revista Brasileira de Zootecnia, June 2006, FapUNIFESP (SciELO)

    Ricardo Vieira

  70. Composição do ganho e exigências de energia e proteína para ganho de peso em bovinos Nelore puros e mestiços

    Article • Revista Brasileira de Zootecnia, June 2006, FapUNIFESP (SciELO)

    Ricardo Vieira

  71. Eficiência de utilização da energia metabolizável em bovinos Nelore puros e cruzados submetidos a quatro níveis de concentrado na ração

    Article • Revista Brasileira de Zootecnia, June 2006, FapUNIFESP (SciELO)

    Ricardo Vieira

  72. Exigências nutricionais em macronutrientes minerais (Ca, P, Mg, Na e K) para novilhos de diferentes grupos genéticos

    Article • Revista Brasileira de Zootecnia, April 2006, FapUNIFESP (SciELO)

    Ricardo Vieira

  73. Avaliação de modelos matemáticos para o estudo da cinética de passagem de partículas e de fluidos por bovinos em pastagem recebendo suplementos contendo diferentes níveis de proteína não-degradável no rúmen

    Article • Revista Brasileira de Zootecnia, December 2005, FapUNIFESP (SciELO)

    Ricardo Vieira

  74. Consumo e desempenho de novilhas em pastagem recebendo suplementos com diferentes níveis de proteína não-degradável no rúmen

    Article • Revista Brasileira de Zootecnia, December 2005, FapUNIFESP (SciELO)

    Ricardo Vieira

  75. Parâmetros cinéticos da degradação in vitro de alimentos incubados com inóculo microbiano de diferentes espécies de ruminantes

    Article • Arquivo Brasileiro de Medicina Veterinária e Zootecnia, August 2005, FapUNIFESP (SciELO)

    Ricardo Vieira

  76. Estimation of the total efficiency of metabolizable energy utilization for maintenance and growth by cattle in tropical conditions

    Article • Revista Brasileira de Zootecnia, June 2005, FapUNIFESP (SciELO)

    Ricardo Vieira

  77. Kinetics of accumulative gas production from horse colon digesta

    Article • Pferdeheilkunde Equine Medicine, January 2005, Hippiatrika GmbH

    Ricardo Vieira

  78. Cinética de Degradação de Alguns Volumosos Usados na Alimentação de Cabras Leiteiras por Intermédio da Técnica de Produção de Gases sob Diferentes Níveis de pH

    Article • Revista Brasileira de Zootecnia, December 2001, FapUNIFESP (SciELO)

    Ricardo Vieira

  79. Padrão Nictemeral do pH Ruminal e Comportamento Alimentar de Cabras Leiteiras Alimentadas com Dietas Contendo Diferentes Relações Volumoso: Concentrado

    Article • Revista Brasileira de Zootecnia, December 2001, FapUNIFESP (SciELO)

    Ricardo Vieira

  80. Degrabilidade Ruminal da Matéria Seca e da Fibra em Detergente Neutro de Alguns Volumosos Utilizados na Alimentação de Cabras Leiteiras, Submetidas a Dietas com Diferentes Relações Volumoso: Concentrado

    Article • Revista Brasileira de Zootecnia, December 2001, FapUNIFESP (SciELO)

    Ricardo Vieira

  81. Fracionamento dos carboidratos e cinética de degradação in vitro da fibra em detergente neutro da extrusa de bovinos a pasto

    Article • Revista Brasileira de Zootecnia, June 2000, FapUNIFESP (SciELO)

    Ricardo Vieira

  82. Fracionamento e cinética de degradação in vitro dos compostos nitrogenados da extrusa de bovinos a pasto

    Article • Revista Brasileira de Zootecnia, June 2000, FapUNIFESP (SciELO)

    Ricardo Vieira

  83. Simulação da dinâmica de nutrientes no trato gastrintestinal: aplicação e validação de um modelo matemático para bovinos a pasto

    Article • Revista Brasileira de Zootecnia, June 2000, FapUNIFESP (SciELO)

    Ricardo Vieira

  84. Kinetic parameters of ruminal degradation estimated with a non-automated system to measure gas production

    Article • Livestock Production Science, March 1999, Elsevier

    Ricardo Vieira

  85. The influence of elephant-grass (Pennisetum purpureum Schum., Mineiro variety) growth on the nutrient kinetics in the rumen

    Article • Animal Feed Science and Technology, July 1997, Elsevier

    Ricardo Vieira

  86. Application of non-linear models in the description of in situ degradation profiles of the elephant grass (Pennisetum purpureum Schum., Mineiro variety)

    Article • Animal Feed Science and Technology, May 1997, Elsevier

    Ricardo Vieira