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| Registros recuperados: 389 | |
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| Vedovatto,Marcelo; Diogo,José Mauro da Silva; Beltrame,João Artêmio Marin; D'Oliveira,Marcella Cândia; Silva,Cássio José da; Mendes,Clayton Quirino; Cabral Filho,Sergio Lucio Salomon; Franco,Gumercindo Loriano. |
| ABSTRACT The objective was to evaluate the addition of antibiotic growth promoters to free-choice mineral supplement on ingestive behavior, mineral intake, and growth performance of grazing bulls. Sixty Nellore bulls [initial body weight (BW) of 219±17.8 kg and 15±2 months of age] were divided in 12 marandu grass paddocks. The treatments were: mineral supplement (control), mineral supplement + virginiamycin (VIRG), mineral supplement + lasalocid sodium (LASA) and mineral supplement + salinomycin sodium (SALI). Mineral supplements were formulated with target intake of 60 g d−1 and the growth promoters of 75 mg 100 kg−1 of BW. The experimental design was the completely randomized blocks. There was no treatment effect on ingestive behavior or mineral intake;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feed additive; Cattle; Ionophore; Lasalocid; Salinomycin; Virginiamycin. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100706 |
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| Netto,Arlindo Saran; Zanetti,Marcus Antonio; Del Claro,Gustavo Ribeiro; Vilela,Flávio Garcia; Melo,Mariza Pires de; Correa,Lísia Bertonha; Pugine,Silvana Marina Piccoli. |
| Twenty-eight Brangus cattle were used to determine the effect of copper and selenium supplementation on the carcass characteristics, fatty acid composition of the longissimus dorsi muscle and on the copper and selenium concentrations in the liver. The treatments were: no supplementation of copper or selenium; 2 mg Se/kg DM as sodium selenite; 40 mg Cu/kg DM as copper sulfate; and 2 mg Se/kg DM as sodium selenite and 40 mg Cu/kg DM as copper sulfate. The fat thickness, rib eye area and fatty acid composition of the longissimus dorsi muscle were not affected by treatments. There was no effect on carcass yield and cooling loss with the supplementation of copper, selenium or selenium × copper in the levels studied. For the ether extract concentration in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Concentrations; Fatty acids; Minerals. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000100010 |
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| Franzolin,Raul; Dehority,Burk A.. |
| In order to study the effect of pH on defaunation in the rumen, four rumen fistulated steers were fed a basal roughage diet for a 4-week adaptation period followed by 17 weeks of feeding with three diets and two feeding levels of high concentrate diet. Rumen outflow fluid rate was evaluated in both ration levels. Rumen protozoa population was monitored weekly and when animals became defaunated, protozoa were reinoculated with rumen contents from one of the faunated steers. At every two weeks, during all the experimental period, rumen pH was measured in all animals at 0, 4, 8 and 12 h after feeding. It was observed an individual animal influence on the establishment and maintenance of the rumen ciliate protozoa population. In all sampling times, mean rumen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Ciliate protozoa; Rumen microorganism; Ruminal fauna. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001000023 |
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| Arthur,J P.F.; Herd,R.M.. |
| Providing feed is a major input cost in beef production, hence improvements in the efficiency of feed utilisation will reduce the cost of production. Residual feed intake (RFI) is a measure of feed efficiency, and is defined as the difference between an animal's actual feed intake and its expected feed intake based on its size and growth. It is independent of the level of production, and the lower the value the more efficient the animal is. This paper examines the current state of knowledge on RFI. Available information indicates that postweaning RFI is moderately heritable, and that selection for low RFI will result in progeny that consume less feed for the same level of production as progeny of high RFI cattle. Under ad libitum feeding, RFI is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Feed efficiency; Growth; Residual feed intake. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008001300031 |
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| Barbosa,Eleonora Araújo; Egito,Andréa Alves do; Abreu,Urbano Gomes Pinto de; Juliano,Raquel Soares; Silva,Joseane Padilha da; Mariante,Arthur da Silva; Ramos,Alexandre Floriani. |
| The objective of this study was to use morphometric and ultrasound evaluations to estimate the growth curve of the Pantaneiro cattle breed, raised in its natural habitat, aiming at the re-insertion of this breed in production systems. One hundred and three females, aging from months to 11 years, and raised on native pastures, were evaluated. The animals belonged to the Conservation Nucleus of Embrapa Pantanal, located in the Pantanal of Mato Grosso do Sul (Brazil). Weight, thoracic perimeter (TP), body length (BL), rump height (RH), height at withers (HW), hip height (HH), depth (DP), distance between the ilia (DI) (cm) and rib-eye area (REA) were measured. To relate the measurements with the age of the animals, the univariate regression model was used,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal production; Biometric; Cattle; Conservation; Genetic resources; Ultrasound. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001100002 |
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| Detmann,Edenio; Cecon,Paulo Roberto; Andreotti,Marcelo de Oliveira; Resende,Flávio Dutra de; Sousa,Daniel de Paula; Ponciano,Niraldo José; Campos,José Maurício de Souza; Souza,Paulo Marcelo de; Vittori,Andrea. |
| The objective of this work was to evaluate the inter treatment discrimination according to feed conversion efficiency in several animal performance experiments. The variables investigated were: feed conversion ratio (FCR = intake: production ratio), feed efficiency index (FEI = production: intake ratio) and bio-nutritional index (BNI). The BNI was constructed from the first canonical variable obtained based on the multivariate analysis of variance of the intake and animal production (weight gain or milk production) variables. The results indicated that FCR and FEI reciprocated each other at experimental plot level but did not reciprocate at animal group or treatment level. This fact implicates distortions on the descriptive levels of probability of type I... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bio-nutritional index; Cattle; Feed conversion ratio; Feed efficiency index; Multivariate statistical analysis; Poultry. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982005000700030 |
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| Weber,Vanessa Aparecida de Moraes; Weber,Fabricio de Lima; Gomes,Rodrigo da Costa; Oliveira Junior,Adair da Silva; Menezes,Geazy Vilharva; Abreu,Urbano Gomes Pinto de; Belete,Nícolas Alessandro de Souza; Pistori,Hemerson. |
| Abstract The objective with this study was to analyze the body measurements of Girolando cattle, as well as measurements extracted from their images, to generate a model to understand which measures further explain the cattle body weight. Therefore, the experiment physically measured 34 Girolando cattle (two males and 32 females), for the following traits: heart girth (HGP), circumference of the abdomen, body length, occipito-ischial length, wither height, and hip height. In addition, images of the dorsum and the body lateral area of these animals allowed measurements of hip width (HWI), body length, tail distance to the neck, dorsum area (DAI), dorsum perimeter, wither height, hip height, body lateral area, perimeter of the lateral area, and rib height.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Computer vision; Livestock precision; Machine learning; Mass estimation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100800 |
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| Silveira,Isabella Dias Barbosa; Fischer,Vivian; Farinatti,Luis Henrique Ebling; Restle,João; Alves Filho,Dari Celestino; Menezes,Luís Fernando Glasenapp de. |
| The relation between temperament with performance and meat quality was determined in 79 Charolais × Nellore steers kept in feedlot. Temperament was evaluated according to exit velocity, scale composite score and flight distance four times in the finishing phase, along with body weight, intake and feed conversion measures. Cattle were classified as calm, intermediate and excited according to exit velocity measures at the beginning of the trial. Excited cattle presented larger values for composite score and flight distance. Irrespective of genotype, excited cattle presented lower average daily gain, dry matter intake and worse feed conversion. Temperament categories did not affect most of beef quality traits, except for calm Bos indicus steers, which... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Intake; Meat characteristics; Temperament; Weight gain. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600022 |
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| Ardicli,Sena; Soyudal,Bahadir; Samli,Hale; Dincel,Deniz; Balci,Faruk. |
| ABSTRACT The objectives of the study were to evaluate allelic frequencies and test the association between STAT1, OLR1, CSN1S1, CSN1S2 , and DGAT1 gene polymorphisms and milk production traits including lactation milk yield, 305 days milk yield, days before peak milk production, and peak milk yield. In addition, samples of milk were analysed for fat, protein, lactose, and total solid contents. A total of 168 purebred Holstein-Fresian cows were genotyped using polymerase chain reaction and restriction fragment length polymorphism methods. Statistical analysis was carried out using least square methods of the general linear model procedure. Significant differences were found between genotypes of the CSN1S2 locus in relation to milk protein content. In... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Dairy cow; Milk composition; Polymorphism. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100411 |
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| Oliveira,Ana Alix Mendes de Almeida; Vitti,Dorinha Miriam Silber Schmidt; Oliveira,Simone Raymundo de; Costa,Patrícia Barcellos; Neres,Marcela Abbado; Hermes,Paula Regina; Cavilhão,Cristiani; Konieczniak,Paula. |
| The objective of this study was to evaluate the use of the dietary cation-anion balance (DCAB) on the calcium metabolism in male Nellore steers with a mean age of 10 months. Three experimental diets were tested: a cationic diet, a diet consisting of Tifton hay only, and an anionic diet with +15.2, +23.9 and −10.0 mEq/100 g DM of DCAB values in the diet. The anionic diet was calculated as the addition of salts of ammonium chloride and magnesium sulfate. Based on the isotope dilution technique, the negative DCAB value used in this study (−10.0 mEq/100 g DM) does not affect calcium metabolism, especially endogenous losses and true absorption. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Feeds; Isotopes; Mineral metabolism. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001100601 |
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| Guerra, Guilherme Alves; Dorneles, Elaine Maria Seles; Souza, Fernando Nogueira; Cortez, Adriana; Batista, Camila Freitas; Coelho, Sandra Gesteira; Lage, Andrey Pereira; Della Libera, Alice Maria Melville Paiva; Heinemann, Marcos Bryan. |
| Neonates are able to respond to infectious agents by their innate and acquired immune responses, however, they are slow, produced in small-scale and have low antibody concentrations. Thus, maternal immunity transference is critical to calf initial survival, since it provides antibodies to the neonate bovine, cells of the immune system, as well as other essential elements to its survival, as nutrients, components of the complement system, growth factors, hormones, cytokines, oligosaccharides, gangliosides, reactive oxygen molecules, acute phase proteins, immunomodulatory factors, enzymes, ribonucleases, nucleotides, polyamines, peptides and proteins with antimicrobial activity, antioxidants and trypsin inhibitors. This review presents a discussion of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bovines; Cattle; Colostrum; Passive immunity bovinos; Criação de bezerros; Colostro; Imunidade passiva. |
| Ano: 2017 |
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/37632 |
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| Barbosa da Silva,Jenevaldo; Nunes de Santana Castro,Gustavo; Nunes dos Santos,Priscilla; Henrique da Fonseca,Adivaldo; Henrique da Silva Lima,Danillo; dos Anjos Bomjardim,Henrique; dos Santos Belo Reis,Alessandra; de Oliveira Soares,Susiane; Diomedes Barbosa,José. |
| The aim of this study was to determine the prevalence of Toxoplasma gondii in cattle from the Northern and Midwestern regions of Brazil. Serum samples were collected from 1789 animals and tested by indirect enzyme-linked immunosorbent assay (ELISA). The overall prevalence of T. gondii was 83.40% (1492/1789). The prevalence rates of T. gondii-seropositive animals observed in the states of Pará, Tocantins and, Mato Grosso were 87.45%, 87.79% and 73.06%, respectively. The detection of high prevalence rates of T. gondii in cattle deserves special attention because they are the main source of high biological value protein for humans. This finding indicates the need for further studies on the risk that these animals may pose to public health. |
| Tipo: Journal article |
Palavras-chave: Cattle; ELISA; IFAT; Toxoplasma gondii. |
| Ano: 2015 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2015000100008 |
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| Tedeschi,Luís Orlindo; Fox,Danny Gene; Sainz,Roberto Daniel; Barioni,Luís Gustavo; Medeiros,Sérgio Raposo de; Boin,Celso. |
| Mathematical models can be used to improve performance, reduce cost of production, and reduce nutrient excretion by accounting for more of the variation in predicting requirements and feed utilization in each unique production situation. Mathematical models can be classified into five or more categories based on their nature and behavior. Determining the appropriate level of aggregation of equations is a major problem in formulating models. The most critical step is to describe the purpose of the model and then to determine the appropriate mix of empirical and mechanistic representations of physiological functions, given development and evaluation dataset availability, inputs typically available and the benefits versus the risks of use associated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Feeding; Nutrient; Requirement; Supply. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000100015 |
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| Cardoso,Leandro Lunardini; Tarouco,Jaime Urdapilleta; MacNeil,Michael D.; Lobato,José Fernando Piva; Dambrós,Mara Célia; Freitas,Aline Kellermann de; Devincenzi,Thais; Feijó,Fernanda Dorneles; Cardoso,Fernando Flores. |
| ABSTRACT Two hundred seventeen grass-finished Braford steers were assessed by ultrasonic scanning and subsequently harvested with their pistol hindquarters fabricated into boneless wholesale cuts. The Longissimus thoracis muscle area and subcutaneous fat depths were measured. The objectives of this study were: 1) to develop prediction equations for weights of the pistol hindquarter and high-value commercial cuts, and 2) to estimate sample size needed for experiments comparing pistol hindquarter retail product weight using either physically or ultrasonically measured carcass traits. Carcass measurements explained 44 % to 94 % of the variation in weights of individual cuts, whereas, measurements that were made using ultrasound explained 42 % to 90 % of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Carcass; Models; Ultrasound. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000400401 |
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| Registros recuperados: 389 | |
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