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| Registros recuperados: 780 | |
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| Barcellos, Vinicius Cunha; Mottin, Camila; Prado, Rodolpho Martin do; Schenkel, Tiago; Viana, Cibeli; Vital, Ana Carolina Pelaes; Bersot, Luciano dos Santos; Sañudo, Carlos; Prado, Ivanor Nunes do. |
| In order to evaluate how beef buyers in the State of Paraná, Brazil south value meat quality indicators, and attributes of credibility, 519 interviews were conducted in three cities with different sizes (Big – Curitiba, Medium – Campo Mourão and Small – Palotina). The interviews were applied after the meat was placed in the shopping cart and were composed of five questions, including question of spontaneous response: (i) factors that the buyer considers at the purchasing time; (ii) information which the buyer considers important to appear on the meat label; and three questions of stimulated response: (i) preference for meat preparation and exposure for sale, (ii) factors that the buyer considers when purchasing the meat, and (iii) preference for marbling... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal production; Beef cattle; Brazil; Meat quality; Price.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/46533 |
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| Branco, Antonio Ferriani; UEM; Moreli, Geraldo; EMATER-Paraná; Jobim, Clóves Cabreira; UEM; Cecato, Ulysses; UEM; Guimarães, Kátia Cylene; CEFET-Rio Verde; Teixeira, Silvana; UEM. |
| The aim of this study was to evaluate protein supplementation on the performance of steers grazing on Mombaça grass and receiving chopped sugar cane tops at a level of 0.80% of live weight (dry matter (DM) basis), during the dry season. Forage availability and quality of the experimental pasture were also evaluated. Thirty-two Nellore steers, weighing 300 kg (± 25.80) of initial live weight, eight per treatment, were used. The statistical design was completely randomized and each steer group was allocated to one of four paddocks (1.125 ha paddock-1). All steers received a protein supplement at 0.40% of live weight (DM basis) and the four treatments consisted of the following four crude protein (CP) concentrations in supplements: 12.5, 25.0, 37.5... |
| Tipo: Pesquisa de campo e laboratorial |
Palavras-chave: 5.04.03.00-1 protein supplementation; Beef cattle; Tropical pasture 5.04.03.02-8 protein supplementation; Beef cattle; Tropical pasture. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/8142 |
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| Andreotti, Carlos Cesar; Gusman, Jairo Andreas Pardo; Ramos, Tatiane Rogelio; Barcellos, Vinicius Cunha; Guerrero, Ana; Prado, Ivanor Nunes. |
| This work was carried out to evaluate the animal performance, carcass characteristics and meat quality of crossbred heifers slaughtered at three different body weights. The heifers were slaughtered with 330 (Light), 360 (Medium) and 400 (Heavy) kg body weight. The final weight, average daily gain and carcass weight were greater for HEA heifers, intermediate for MED heifers and lower for LIG heifers. However, carcass dressing and pH were similar for the three heifers groups. Dripping loss, dissection loss and the muscle, fat and bone percentages on the 6th rib did not alter by slaughter weight. Slaughter weight did not affect the colour, shear force and lipid oxidation of meat. In conclusion, heavy heifers finished in pasture and that were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ruminanates; Produção Animal instrumental analysis; Beef cattle; Meat; Animal production.. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/25847 |
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| Bresolin, Tiago; Everling, Dionéia Magda; Rorato, Paulo Roberto Nogara; Braz, Camila Urbano; Breda, Fernanda Cristina. |
| The aim of this study was to assess the occurrence of genotype-environment interaction, as well as its effects on the magnitude of genetic parameters and the classification of Nellore breeding bulls for the trait adjusted weight at 205 days (W205) on Southern Brazil. The components of (co)variance were estimated by Bayesian inference, using a linear-linear animal model in a bi-trait analysis. The proposed model for the analyses considers as random the direct additive genetic and maternal effects and residual effects, and as fixed effects the contemporary groups, sex, season of birth and weighing, and calving age as covariable (linear and quadratic effects). The a posteriori mean estimates of the direct heritabilities for W205 in the three States varied... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Variance components; Genetic correlation; Bayesian inference; Genetic parameters.. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/23602 |
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| Faria,D.P.; Costa,M. D. da; Raidan,F. S. S.; Ruas,J. R. M.; Júnior,V. R. R.; Toral,F. L. B.; Aspiazú,I.. |
| This study aimed to evaluate the influence of initial weight, initial age, average daily gain in initial weight, average daily gain in total weight and genetic group on the probability of pregnancy in primiparous females of the Nellore, 1/2 Simmental + 1/2 Nellore, and 3/4 Nellore + 1/4 Simmental genetic groups. Data were collected from the livestock file of the Farpal Farm, located in the municipality of Jaíba, Minas Gerais State, Brazil. The pregnancy diagnosis results (success = 1 and failure = 0) were used to determine the probability of pregnancy that was modeled using logistic regression by the Proc Logistic procedure available on SAS (Statistical..., 2004) software, from the regressor variables initial weight, average daily gain in initial weight,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Average daily gain; Beef cattle; Breeding season; Pregnancy rate. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000601795 |
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| Nobre,P.R.C.; Lopes,P.S.; Torres,R.A.; Silva,L.O.C.; Regazzi,A.J.; Torres Júnior,R.A.A.; Misztal,I.. |
| Growth curves of Nellore cattle were analyzed using body weights measured at ages ranging from 1 day (birth weight) to 733 days. Traits considered were birth weight, 10 to 110 days weight, 102 to 202 days weight, 193 to 293 days weight, 283 to 383 days weight, 376 to 476 days weight, 551 to 651 days weight, and 633 to 733 days weight. Two data samples were created: one with 79,849 records from herds that had missing traits and another with 74,601 from herds with no missing traits. Records preadjusted to a fixed age were analyzed by a multiple trait model (MTM), which included the effects of contemporary group, age of dam class, additive direct, additive maternal, and maternal permanent environment. Analyses were carried out by a Bayesian method for all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Multiple trait; Random regression. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352003000400015 |
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| Nobre,P.R.C.; Rosa,A.N.; Silva,L.O.C.. |
| Expected progeny differences (EPD) of Nellore cattle estimated by random regression model (RRM) and multiple trait model (MTM) were compared. Genetic evaluation data included 3,819,895 records of up nine sequential weights of 963,227 animals measured at ages ranging from one day (birth weight) to 733 days. Traits considered were weights at birth, ten to 110-day old, 102 to 202-day old, 193 to 293-day old, 283 to 383-day old, 376 to 476-day old, 551 to 651-day old, and 633 to 733-day old. Seven data samples were created. Because the parameters estimates biologically were better, two of them were chosen: one with 84,426 records and another with 72,040. Records preadjusted to a fixed age were analyzed by a MTM, which included the effects of contemporary... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Multiple trait; Random regression. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352009000400026 |
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| Rocha,J.C.M.C.; Tonhati,H.; Alencar,M.M.; Lôbo,R.B.. |
| Variance components were estimated for gestation length fitting the additive direct effect of calf, maternal genetic effect and sire effect as random effects. The statistical models also included the fixed effects of contemporary group, that included the date of breeding (AI), date of birth, and sex of calf, and the covariate age of dam at calving (linear and quadratic). Two different models were used, model 1 considering GL as a trait of the calf, and model 2 considering GL as a trait of the dam. The means of gestation length for the purebred animals were 294.55 days (males) and 293.34 days (females), while for the crossbred animals they were 292.49 days (males) and 292.55 days (females). Variance components for the purebred animals, fitting model 1, were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Gestation length; Heritability; Repeatability. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000600013 |
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| Moreira,C.N.; Souza,S.N.; Barini,A.C.; Araújo,E.G.; Fioravanti,M.C.S.. |
| This study aimed to determine the power of the serum aspartate aminotransferase (AST) and gamma-glutamyltransferasase (GGT) activities and of the albumin and cholesterol dosages for detecting hepatic histopathological injuries. A total of 220 healthy male Nelore cattle that had been extensively bred were evaluated. Blood and liver samples were collected on the day of slaughter for biochemical and histopathological tests. The results showed that the sensitivity to AST, GGT, albumin, and cholesterol tests were respectively 22.4%, 22.4%, 36%, and 37.2%. The specificity of AST, GGT, albumin, and cholesterol tests was respectively 78.8%, 90.4%, 75.6%, and 68.3%. In short, the detection of minor liver injuries through biochemical tests is limited; however, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Albumin; AST; Cholesterol; Clinical biochemistry; GGT. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000600001 |
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| Schoenau,W.; Porciuncula,P.M.; Zamberlan,G.; Mesquita,F.S.; Vieira,V.; Oliveira,J.F.C.; Gonçalves,P.B.D.. |
| The association between single-strand conformation polymorphism (SSCP) in the gene of insulin-like growth factor-I receptor (IGF-IR) and age at first calving (AFC), calving interval (CI), lactation length (LL), and milk yield (MY) was studied using 106 graded Holstein females. The polimerase chain reaction (PCR) with specific initiating oligonucleotides, resulted an amplified fragment of 335pb. The population genotypes frequencies were 82.1% and 17.9%, for AA and AB genotypes, respectively. The frequency of A allele was 0.91 and 0.09 of B allele. No association between the identified polymorphism and AFC, CI, and MY was observed. The LL was positively associated (P<0.05) with the absence of B allele. Animals carrying the AA genotype presented a longer... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Reproductive efficiency; Post-calving; Candidate gene. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000600011 |
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| Meirelles,Ciro; Kozicki,Luiz Ernandes; Weiss,Romildo Romualdo; Segui,Marcio Saporski; Souza,Antonio; Santos,Ivo Walter dos; Breda,Jose Carlos dos Santos. |
| This study aimed to compare the pregnancy rate using the conventional artificial insemination (AI) or deep intracornual artificial insemination (DIAI), with low number of spermatozoa (4.0 million sperm) in 270 Nelore cows. The animals were divided in two groups (G: G1 (135 cows) conventional AI was performed (=semen deposition in the uterine body) and in G2 (135 cows) to DIAI, in ipsilateral horn where the dominant follicle in the ovary had previously been detected, by ultrasound examinations. For both the methods, a single artificial insemination was carried out after visual estrus observation, checked three times a day (morning, afternoon and evening). The pregnancy diagnosis after 45 days was conducted by ultrasound. Results showed a better pregnancy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Deep intracornual artificial insemination; Beef cattle; Artificial insemination; Nelore cows. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000300006 |
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| Primavesi,Odo; Freitas,Alfredo Ribeiro de; Primavesi,Ana Cândida; Oliveira,Haydée Torres de. |
| The Canchims creek watershed in São Carlos, SP, Brazil, was chosen to evaluate water quality affected by dairy and beef cattle production systems based on tropical pasture. The water samples were collected monthly, during three years, at six sampling points: spring in a tropical forest, spring in an intensive dairy production system, two dam springs, and stream water upward and at the delta. Results showed differences (P<0.01) among sampling points for the mean parameters. True color, hardness, turbidity, electric conductivity, alkalinity, pH, chemical oxygen demand and consumed oxygen explained well differences among sampling points. According to current legislation standards, water quality fitted with most of the established parameters for class 2,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cattle; Beef cattle; Intensive management; Pasture; Water quality; Watershed. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200013 |
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| Toro,Paula; Catrileo,Adrián; Aguilar,Claudio; Vera,Raúl. |
| A mathematical model was developed to analyze beef production systems in Southern Chile. The study considered the identification of the main components of systems under different beef steer management strategies, using pasture with or without supplementation and back grounding cattle on pasture followed by a winter period of confined feeding with pasture silage and concentrates. Validation of model outputs using 200 kg LW Hereford steers against real experimental data showed no significant differences (P ≥ 0.01) between simulated and observed final weights. In order to analyze the interaction between the stocking rate (SR) and supplementation, three SR of 2, 2.5 and 3 steers ha-1 with and without pasture silage supplementation at the rate of 5 kg... |
| Tipo: Journal article |
Palavras-chave: Beef cattle; Supplementation; Grazing systems; Simulation models. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000200010 |
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| Guimarães,Adriano de Souza; Souza,José Camisão de; Andrade,Ivo Francisco de; Freitas,Rilke Tadeu Fonseca de; Cirillo,Marcelo Ângelo. |
| The objective was to characterize cattle slaughtered from the region of Lavras - MG. In the public abattoir 720 bovines were identified and slaughtered from September 20th through November 20th of 2004. Variables such as: genetic origin, live weight, body condition, age, and sex were studied. At arrival, animals were weighed and classified according to their genetic origin. Before slaughter, their body condition (BC) was determined on a 1 - 9 scale. Reproductive status was observed during scratch and evisceration: castrated male, MC; intact male, MI; pregnant female, FG; and Non-pregnant female, FNG. Age was determined by the count of the permanent incisive teeth (p.i.t.). Most animals slaughtered during the survey were male, with predominance of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Slaughter; Animal traits. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542008000100036 |
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| Registros recuperados: 780 | |
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