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| Pazdiora,Raul Dirceu; Resende,Flávio Dutra de; Faria,Marcelo Henrique de; Siqueira,Gustavo Rezende; Almeida,Geraldo Benedito de Souza; Sampaio,Ricardo Linhares; Pacheco,Paulo Santana; Prietto,Murilo Sergio Rodrigues. |
| The objective of this study was to evaluate animal performance and carcass characteristics of 64 Nellore young bulls at 22 months of age finished in a feedlot and slaughtered at five body weights (350; 455; 485; 555 and 580 kg) fed diets containing coated or uncoated urea. The experimental design adopted was completely randomized, set in a 4 × 2 factorial arrangement, and for the variables assessed in the control animals, it was 5 × 2. No effect of interaction between slaughter weights and diets were observed, so the variables were analyzed separately, compared by polynomial contrasts and by the F test, respectively. The time animals remained in the feedlot to reach slaughter weights was 66, 88, 145 and 194 days. Average daily gain (ADG) showed quadratic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body composition; Fat thickness; Feed efficiency; Feedlot; Gain yield; High grain rations. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000400007 |
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| Carvalho,Thiago Dutra de; Siqueira,Fabiane; Torres Júnior,Roberto Augusto de Almeida; Medeiros,Sérgio Raposo de; Feijó,Gelson Luís Dias; Souza Junior,Maury Dorta de; Blecha,Isabella Maiumi Zaidan; Soares,Cleber Oliveira. |
| The objective of the present study was to estimate the allelic and genotypic frequencies of the polymorphisms E2FB (AY138588.1: c.305C> T), located in the leptin gene (LEP), and TG5 (X05380.1:g.-422C>T), located in the thyroglobulin gene (TG), and evaluate the association of these polymorphisms in crossbred cattle of seven distinct genetic groups with the following traits: slaughter weight (SW), hot carcass weight (HCW), hot carcass yield (HCY), carcass fat thickness (CFT), ribeye area (REA), marbling (MARM) and shear force (SF). The animals were genotyped using the PCR-RFLP (Polymorphism Chain Reaction-Restriction Fragment Length Polymorphism) technique, using 201 products obtained from F1 Caracu × Nellore, Angus × Nellore and Valdostana × Nellore... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fat thickness; Marker-assisted selection; Meat tenderness; Shear force; SNP. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001000004 |
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| Teira,Gustavo Adolfo; Tinois,Eduardo; Lotufo,Roberto de Alencar; Felício,Pedro Eduardo de. |
| For several decades, beef carcass evaluation for grading or research purposes has relied upon subjective visual scores, and manually taken measurements, but in recent times there has been a growing interest in new technologies capable of improving accuracy of estimates. Equations to predict weight and yield of beef pistol subprimal cuts were developed in this work using digital image analysis (VIA) of the 12th rib steak. Equations to predict total pistol subprimal cuts weight (CUTS) had coefficients of determination (CD) of 0.84, or 0.87 to 0.88, when the independent variables were the VIA parameters and the half carcass weight (HC) or the total pistol weight (TP), respectively. The predicted values for the total seven subprimal cuts, as a percentage of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef industry; Beef carcass; Image analysis; Rib eye area; Fat thickness. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200028 |
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| Messana,Juliana Duarte; Canesin,Roberta Carrilho; Fiorentini,Giovani; Reis,Ricardo Andrade; Arcuri,Pedro Braga; Berchielli,Telma Teresinha. |
| The objective of this study was to evaluate nutrient intake, performance, estimated methane production and carcass characteristics of steers fed diets containing three different levels of soybean grain: 0, 120 and 230 g/kg on the dry matter (DM). The study was conducted on eighteen castrated Nellore males with an average initial body weight (BW) of 370±12 kg in a completely randomized design, with three treatments and six repetitions. Intake of dry matter (DMI, kg/day) and crude protein tended to decrease linearly, and the intake of ether extract increased linearly in response to the soybean grain levels in the diet. Levels of soybean grain in the diet did not affect DMI (g/kg of BW), final average weight, average daily weight gain, feed efficiency and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carcass yield; Fat thickness; Greenhouse gases; Lipids; Loin eye area; Weight gain. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001200662 |
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| Kill,João Luis; Haddade,Ismail Ramalho; Santos Júnior,Iron Cardoso dos; Haese,Douglas; Chambela Neto,Alberto; Paulino,Pedro Veiga Rodrigues; Possatti,Carolina D'ávila. |
| The effect of four levels of inclusion (0; 450; 900 and 1,350g T-1) of Ractopamine hydrochloride was assessed concerning weight gain, feed conversion, dry matter intake, carcass traits and quality of castrated male cattle meat in confinement. Forty Nellore steers were used, with an average age of 26 months and initial average weight of 423.4±2.7kg, in a randomized block experimental design with four treatments and ten replications. The diet was fixed with the ratio of forage to concentrate dry matter of 75.3:24.7. A Linear positive effect observed was the inclusion of Ractopamine on daily weight gain and linear negative effect on feed conversion, highlighting the improvements with the increasing inclusion of Ractopamine hydrochloride. In relation to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additive; Confinement; Fat thickness; Tenderness.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001001830 |
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| Suguisawa,Liliane; Mattos,Wilson Roberto Soares; Oliveira,Henrique Nunes de; Silveira,Antônio Carlos; Arrigoni,Mário de Beni; Haddad,Cláudio Maluf; Chardulo,Luis Artur Loyola; Martins,Cyntia Ludovico. |
| Considerable resources have been allocated to support research in the development of non-invasive and non-destructive techniques for carcass composition and quality evaluation. Ultrasonography is a reliable and relatively low-cost technique that can be used. In the present study, real-time ultrasonography was used to predict ribeye area (REA) and subcutaneous fat thickness (FT) in live animals as compared to carcass measurements. Animals used were 115 yearling bull calves (initial body weight, 329 kg), kept under feedlot conditions, of four genetic groups (30, ½ Angus x Nellore; 30, ½ Canchim x Nellore; 30, ½ Simmental x Nellore, and 25 Nellore), and two finishing frame sizes (small and large). Four ultrasonographic measurements were taken every 28 days... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Ribeye area; Fat thickness; Growth; Cross breeds. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400026 |
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