Crossbred Cattle
Mostrando 1-12 de 86 artigos, teses e dissertações.
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1. Experimental infection by Anaplasma marginale in buffaloes and cattle: clinical, hematological, molecular and pathological aspects
RESUMO: O estudo teve como objetivo avaliar e comparar os aspectos clínicos, laboratoriais e patológicos de búfalos e bovinos infectados experimentalmente com estirpe AmRio 2 de Anaplasma marginale. Para isso, foram utilizados quatro bubalinos Murrah e quatro bovinos mestiços, sendo dois animais de cada espécie, esplenectomizados. Estirpe AmRio 2 de A.
Pesq. Vet. Bras.. Publicado em: 04/11/2019
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2. Overprice on purchase of replacement cattle and genetic group as variables of economic result in feedlot operations
ABSTRACT The objective of this study was to analyze the economic result of feedlot operation for three genetic groups of cattle (Nellore, Nellore crossing with other Zebuine breeds, and Dairy crossbred) as a function of the overprice on the purchase price of cattle to be feedlot-finished. The study involved data of 57,589 animals divided into 709 lots origin
R. Bras. Zootec.. Publicado em: 26/08/2019
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3. Concentrations of acute-phase proteins and immunoglobulins in serum and synovial fluid in clinically healthy heifers and steers
RESUMO: O objetivo do estudo foi determinar o padrão de concentração de proteínas de fase aguda e de imunoglobulinas intra-articulares (APPs) em bovinos mestiços saudáveis. As amostras de fluido sinovial (SF) foram coletadas da articulação radiocárpica de 25 novilhas e 25 novilhos. As concentrações de APPs foram mensuradas por SDS-PAGE. Os resulta
Pesq. Vet. Bras.. Publicado em: 18/07/2019
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4. PRODUCTIVE PERFORMANCE OF PRE-WEANED CALVES REARED IN THE PANTANAL
Resumo A desmama precoce (DP) vem sendo adotada nas fazendas de cria do Pantanal como alternativa para o aumento dos índices de concepção das vacas. A principal receita dessas propriedades são os bezerros (as), sendo o seu valor dependente dos seus respectivos pesos. Assim é necessário que os bezerros submetidos à DP, apresentem pesos semelhantes ou a
Ciênc. anim. bras.. Publicado em: 04/02/2019
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5. Characterization of ruminal acidosis and initial phase of laminitis inducted by oligofructose in crossbred calves
RESUMO: Uma das formas de se estudar a laminite bovina é sua indução experimental por meio do fornecimento de grande quantidade de carboidrato de alta fermentação. O protocolo mais eficaz até o momento foi o uso de oligofrutose. Objetivou-se avaliar aspectos clínicos e histológicos dos dígitos de bovinos na indução experimental de acidose ruminal
Pesq. Vet. Bras.. Publicado em: 2019-02
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6. Random regression models with B-splines to estimate genetic parameters for body weight of young bulls in performance tests
ABSTRACT The objective of this study was to estimate genetic parameters for body weight of beef cattle in performance tests. Different random regression models with quadratic B-splines and heterogeneous residual variance were fitted to estimate covariance functions for body weights of Nellore and crossbred Charolais × Nellore bulls. The criteria −2 residu
R. Bras. Zootec.. Publicado em: 30/07/2018
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7. População de protozoários ruminais em novilhos zebuínos alimentados com ou sem volumoso
ABSTRACT This study aimed to quantify and identify the profile of the rumen protozoa population of beef steers fed with or without roughage. Nellore crossbred steers raised in extensive system on lignified tropical pastures with mineral supplementation and steers confined for 60 days only receiving pelletized concentrate and whole corn kernels were evaluated
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2017-10
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8. Parametrization of the Davis Growth Model using data of crossbred Zebu cattle
ABSTRACT: The system of differential equations proposed by Oltjen et al. [1986, named Davis Growth Model (DGM)] to represent cattle growth has been parameterized with data from Bos taurus (British) and Bos indicus (Nellore) breeds. The DGM has been successfully used for simulation and decision support in the United States. However, the effect of about 30 yea
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-02
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9. Using an observer rating method to assess the effects of rotational stocking method on beef cattle temperament over time
ABSTRACT The objectives of this study were to propose behavioral-based definitions for the adjectives used in an observer rating method, and to use this approach to characterize temperament over time in cattle kept under rotational stocking method. We also analyzed the feasibility of the rating method under commercial cattle farming conditions. We evaluated
R. Bras. Zootec.. Publicado em: 2016-09
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10. Genomic selection in multi-breed dairy cattle populations
ABSTRACT Genomic selection has been a valuable tool for increasing the rate of genetic improvement in purebred dairy cattle populations. However, there also are many large populations of crossbred dairy cattle in the world, and multi-breed genomic evaluations may be a valuable tool for improving rates of genetic gain in those populations. Multi-breed models
R. Bras. Zootec.. Publicado em: 2016-04
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11. Kinetics of transit and degradation of the fiber from guinea grass silages enriched with waste from soybean pre-cleaning
The objective was to study the kinetics of transit and degradation of the fiber from guinea grass and the waste from soybean pre-cleaning (WSPC), ensiled with different proportions of mass (0, 100, 150, and 200 g WSPC/kg total mass). Four crossbred (Gyr × Holstein), fistulated cattle with an average body mass of 400±50 kg were organized in a 4 × 4 Latin s
R. Bras. Zootec.. Publicado em: 2015-06
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12. Rumen degradation and passage kinetics of silage made from different corn hybrids
The objective of the present study was to evaluate the parameters related to the digestion of the fiber from silages of four corn hybrids (BX1280, SHS4070, 2B433, and DKB390) developed for silage production. Four rumen-cannulated castrated Holstein × Zebu crossbred cattle with approximate initial weight of 400 kg were distributed in a Latin square design. T
R. Bras. Zootec.. Publicado em: 2014-10