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Search Results: 1 - 10 of 614848 matches for " Márvio Lob?o Teixeira de Abreu "
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Digestible lysine requirements for barrows with high genetic potential for lean Exigência de lisina digestível para suínos machos castrados, dos 30 aos 60 kg, de alto potencial genético para deposi o de carne magra na carca a
Alexandre Luiz Siqueira de Oliveira,Juarez Lopes Donzele,Márvio Lobo Teixeira de Abreu,Francisco Carlos Oliveira Silva
Revista Brasileira de Saúde e Produ??o Animal , 2009,
Abstract: Fifty barrows with high genetic potential for lean gain in the carcass and initial body weight of 29.9 1.57 kg were used to evaluate the effect of feeding different lysine levels on performance and carcass protein deposition rate. A randomized block experimental design, with five treatments, five replicates and two animals per replicate was used. Treatments corresponded to five digestible lysine levels (0.70, 0.80, 0.90, 1.00, and 1.10%) with variable proportions of corn and soybean meal. Animals were kept in the experiment until they reached the final body weight of 60.5 1.74 kg. Linear (P<0.01) increasing effect was observed for the daily weight gain (DWG), but the linear response plateau model was that better fitted to the DWG data, that stabilized in a plateau starting from the level of 1.02% of digestible lysine. Significant linear effects were observed for the feed conversion, daily lysine intake and daily protein deposition by increasing dietary lysine levels but no diet effect was found for the daily feed intake. Digestible lysine level of 1.02%, corresponding to a digestible lysine intake of 19.50g/day, provides the best results of performance and protein deposition in barrows with high genetic potential for lean meat deposition in the carcass in the phase from 30 to 60 kg. Foram utilizados 50 suínos machos castrados de alto potencial genético para deposi o de carne magra na carca a e peso inicial de 29,9 1,57 kg, para avaliar diferentes níveis de lisina sobre o desempenho e as características de carca a. Foi usado delineamento de blocos ao acaso, com cinco tratamentos, cinco repeti es e dois animais por repeti o. Os tratamentos consistiram de cinco níveis de lisina digestível (0,70; 0,80; 0,90; 1,00 e 1,10%), obtidos variando-se a propor o de milho e farelo de soja nas ra es. Os animais permaneceram no experimento até atingirem o peso final de 60,5 1,74 kg. Os níveis de lisina influenciaram de forma linear (P<0,01) crescente o ganho de peso diário (GPD), mas o modelo “Linear Response Plateau” (LRP) foi o que melhor se ajustou aos dados do GPD, estimando em 1,02% o nível a partir do qual ocorreu um plat . A convers o alimentar, o consumo de lisina diário e a deposi o de proteína diária aumentaram de forma linear em raz o dos níveis de lisina da ra o, que, no entanto, n o influenciaram o consumo de ra o diário. Concluiu-se que o nível de 1,02% de lisina digestível, correspondente a um consumo de 19,50 g/dia de lisina digestível (0,29%/Mcal de ED), proporciona os melhores resultados de desempenho e deposi o protéica em suínos mac
Crude protein reduction and digestible methionine+cystine and threonine to digestible lysine ratios in diets for Nile tilapia fingerlings
Quadros, Moisés;Lanna, Eduardo Arruda Teixeira;Donzele, Juarez Lopes;Abreu, Márvio Lobo Teixeira de;Ribeiro, Felipe Barbosa;Takishita, Sylvia Sanae;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000800002
Abstract: the objective of the present study was to investigate crude protein reduction and the methionine+cystine and threonine to lysine ratios in diets for reversed nile tilapia fingerlings (oreochromis niloticus), thai strain. four hundred and twenty nile tilapia fingerlings with an average initial weight of 1.83 ± 0.02 g were placed in a completely randomized design, with five treatments, seven replications per treatment and 12 fish per experimental unit, for 37-days. two crude protein (cp) levels were evaluated (32 and 28%). the diet with 32% cp had methionine+cystine:lysine and threonine:lysine ratios of 63 and 74%, respectively. three diets with 28% cp had methionine+cystine:lysine and threonine:lysine ratios of 63 and 74%, 60 and 74% and 60 and 69%, respectively. the diet with 28% cp and had methionine+cystine:lysine ratio of 63% and threonine:lysine of 74% and was supplemented with 0.3% glutamic acid. the fish were kept in thirty-five 130 l aquariums supplied with single-pass flow-through water, individual aeration and fed ad libitum six times per day. fish fed the diet with 32% cp had lower protein efficiency ratios and nitrogen efficiency ratios. the diet cp level was 28% and the methionine+cystine and threonine to lysine ratios were 60 and 69%, respectively.
Redu??o de proteína bruta com suplementa??o de aminoácidos, com base no conceito de proteína ideal, em ra??es para alevinos de tilápia-do-nilo
Bomfim, Marcos Antonio Delmondes;Lanna, Eduardo Arruda Teixeira;Donzele, Juarez Lopes;Abreu, Márvio Lobo Teixeira de;Ribeiro, Felipe Barbosa;Quadros, Moisés;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008001000001
Abstract: the effect of decreasing dietary crude protein (cp) with supplementation of amino acids, based on the ideal protein concept on nile tilapia (oreochromis niloticus) fingerlings performance was evaluated. a total of 396 fingerlings from thai strain, with 0.80 ± 0.17 g of bw, was allotted to a randomized block design, with six levels of cp (32, 31, 30, 29, 28 and 27% of cp) in the diets, six replications with 11 fish each. the diets were formulated to be isocaloric and digestible isolysine, remaining constant the amino acids to lysine minimum ratio. the fish were kept in 36 aquariums of 130 l, equipped with water supply, controlled temperature and individual aeration, and ad libitum fed six times a day for 40 days. the reduction of cp content of the diet did not affect weight gain, specific growth rate, feed intake, digestible lysine intake, body protein content, fat and protein deposition rates and nitrogen retention efficiency of fishes. the fish fed diets with 27% of cp lower feed: gain ratio, lysine efficiency for gain, nitrogen intake and body water and higher protein efficiency for gain and body fat content. the level of crude protein of the diet for nile tilapia fingerlings can be reduced by four percentage points (from 32 to 28%), without negative effect on the performance of the animals, since the diets are supplemented with essential limiting amino acids.
AVALIA O COMPARATIVA DA METODOLOGIA DE DETERMINA O DA áREA DE OLHO DE LOMBO EM SUíNOS (Sus domesticus)
MAURíCIO DE PAULA FERREIRA TEIXEIRA,JULIANA FORTES VILARINHO BRAGA,MANOEL HENRIQUE KLEIN JúNIOR,MáRVIO LOBO TEIXEIRA ABREU
Ciência Animal Brasileira , 2011,
Abstract: In studies involving the carcass characteristics conducted at the Department of Animal Science of the Federal University of Piauí, the linear measurements of rib eye area (REA) and subcutaneous fat area (SFA) have been carried out by the plastic grid method, in which readings are made by counting in cm2. In order to test this widelyused approach, this study aimed at conducting a comparison among three other more or less precise procedures in order to verify the traditional method accuracy. To estimate the effect of both genetic patterns and the four determination methods (Feedback, AutoCAD, Planimeter, and Weighing) on REA and SFA, analysis of variance (ANOVA) was used in 2 x 4 factorial arrangement. There was no difference among the four methodologies and the feedback method shows easier implementation, more practicality and reliability to be used in researches.
Níveis de treonina digestível em ra??es para suínos machos castrados de alto potencial genético na fase dos 95 aos 125 kg
Santos, Fabrício de Almeida;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Silva, Francisco Carlos de Oliveira;Abreu, Márvio Lobo Teixeira de;Saraiva, Alysson;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000300011
Abstract: the objective of this study was to evaluate the effect of digestible threonine levels on performance and carcass composition of barrows of high genetic potential for meat deposition. eighty barrows with initial weight of 95.87 ± 1.26 kg were distributed in a randomized block design, with five treatments (0.470; 0.497; 0.528; 0.557; 0.587%, corresponding to digestible threonine:digestible lysine ratio of 58.0; 61.0; 65.0; 69.0 and 73.0%, respectively) with eight replications and two animals in each experimental unit. the experimental feeds and water were supplied ad libitum until the end of the experimental period, when the animals reached 125.26 ± 2.59 kg. the digestible threonine levels in the diets did not influence daily feed intake and weight gain, but had a quadratic effect on feed conversion, which improved up to the estimated level of 0.526% threonine in the diet. the daily digestible threonine intake increased linearly according to the levels of this amino acid in the diet. the digestible threonine levels did not influence carcass weight, lean meat gain, back fat thickness at p2 and daily lean meat deposition. the 0.526% digestible threonine level, corresponding to a ratio of 65% digestible lysine and 18.49 g/day digestible threonine intake, lead to the best feed conversion results for high genetic potential barrows, in the phase from 95 to 125 kg.
Available phosphorus levels in diets for swine from 15 to 30 kg genetically selected for meat deposition
Saraiva, Alysson;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Abreu, Márvio Lobo Teixeira de;Silva, Francisco Carlos de Oliveira;Santos, Fabrício de Almeida;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000200013
Abstract: with the objective to evaluate available phosphorus levels in diets for swine genetically selected for meat deposition, sixty commercial hybrid pigs were used, being 30 castrate males and 30 females, with initial weight of 15.00 ± 0.41 kg, distributed in a completely randomized experimental design, with six treatments, five replications and two animals (1 male and 1 female) per experimental unit. the treatments were composed of a basal diet and other five diets obtained through basal diet supplementation with dicalcium phosphate to obtain six ap levels (0.114; 0.221; 0.328; 0.435; 0.542 and 0.649%). the available phosphorus levels promoted a linear increase in the daily feed intake. daily weight gain and feed conversion showed a quadratic behavior according to ap levels, with the maximum response at 0.509 and 0.477% of ap in the diet, respectively. bone strength and bone calcium and phosphorus contents also presented a quadratic behavior according to ap levels, with maximum response at 0.529; 0.619 and 0.596% of ap levels in the diet, respectively. there was no effect of the ap levels in the diets on the bone ash content. the best weight gain and feed conversion observe for castrated male and female pigs from 15 to 30 kg, genetically selected for meat deposition, is provided by 0.509 and 0.477% of available phosphorus levels, respectively, corresponding to daily intakes of 6.39 and 5.93 grams of available phosphorus.
Níveis de triptofano digestível em ra??es para suínos machos castrados de alto potencial genético para deposi??o de carne na carca?a dos 60 aos 95 kg
Haese, Douglas;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Abreu, Márvio Lobo Teixeira de;Silva, Francisco Carlos de Oliveira;Saraiva, Alysson;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000800016
Abstract: seventy commercial hybrid barrows with high genetic potential for lean deposition in the carcass averaging initial and final body weight of 60.0 ± 1.34 kg and 95.0 ± 0.97 kg, respectively, were used to evaluate the effects of dietary digestible tryptophan levels on performance and carcass characteristics. the experiment was analyzed as a randomized experimental block design with five treatments (0.128, 0.136, 0.144, 0.152, and 0.160%) of digestible tryptophan, that is correspondent to the digestible tryptophan:lysine ratios of 16, 17, 18, 19 and 20%, with seven replicates and two animals per experimental unit. no treatment effect on feed intake, weight gain, feed:gain ratio, backfat thickness and lean yield was observed. the digestible tryptophan intake linearly increased as dietary digestible tryptophan levels increased. the 0.128% digestible tryptophan level, that is correspondent to a 16% digestible tryptophan:lysine ratio, met the requirements of barrows with high genetic potential for lean deposition in the carcass from 60 to 95 kg.
Níveis de lisina digestível em ra??es, utilizando-se o conceito de proteína ideal, para suínos machos castrados de alto potencial genético, dos 30 aos 60 kg
Abreu, Márvio Lobo Teixeira de;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Oliveira, Alexandre Luiz Siqueira de;Haese, Douglas;Pereira, Adriana Aparecida;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000100008
Abstract: the effect of increasing dietary digestible lysine levels, based on the ideal protein concept, on performance and carcass characteristics of forty barrows with high genetic potential for lean gain averaging initial and final body weights of 30.02 ± 1.38 kg and 60.44 ± 1.81 kg, respectively, was evaluated in this experiment. the animals were assigned to a randomized blocks design, with four treatments, five replicates and two animals per experimental unit. the treatments consisted of a basal diet (18.08% of cp and 3,250 kcal of me/kg) supplemented with increasing levels of hcl-l-lysine (0.80, 0.90, 1.00, and 1.10% of digestible lysine). the diets were supplemented with constant synthetic amino acids:lysine ratios based on the true digestibility. no treatment effects on feed intake, daily weight gain and plasma urea concentration were observed. feed:gain ratio and digestible lysine intake increased linearly as the dietary digestible lysine levels increased. no significant treatment effects on percentages of water, protein and fat and carcass fat deposition were observed. it was observed increasing linear effect of treatments on carcass protein deposition. the 1.10% digestible lysine level, that corresponds to a digestible lysine intake of 21.94 g/day (3.43 g of lys/mcal of me), resulted in the best performance and carcass characteristics of barrows with high genetic potential from 30 to 60 kg.
Treonina digestível em ra??es para matrizes suínas em lacta??o
Oliveira, Vladimir Augusto Fortes de;Donzele, Juarez Lopes;Abreu, Márvio Lobo Teixeira de;Oliveira, Rita Flávia Miranda de;Silva, Bruno Alexander Nunes;Saraiva, Alysson;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008001200010
Abstract: sixty pluriparous sows (average of four farrowing) from commercial line, with initial weight of 262.7 ± 22.50 kg, were used to evaluate the effect of digestible threonine levels on productive and reproductive performance during 16.02 ± 1.17 days of lactation. the animals were distributed to a completely randomized design, with 4 diets and 15 replications, considering the sow the experimental unit. the diets were formulated with four levels of digestible threonine (0.608, 0.646, 0.684 or 0.722%), the corresponding to 64, 68, 72 and 76% respectively, with digestible lysine ratio). digestible threonine levels did not influence feed consumption, which were 4.7 kg/anim.day. the individual daily digestible threonine consumption ranged from a linear fashion among the threonine levels. there was no effect of dietary digestible threonine levels on productive and reproductive performance of lactating sows. the level of 0.608%, corresponding to digestible threonine: digestible lysine ratio of 64%, meets the digestible requirements of threonine of sows in the lactating period.
Níveis de fósforo disponível em ra??es para suínos de alto potencial genético para deposi??o de carne dos 30 aos 60 kg
Saraiva, Alysson;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Abreu, Márvio Lobo Teixeira de;Silva, Francisco Carlos de Oliveira;Haese, Douglas;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000700017
Abstract: with the objective of evaluating levels of available phosphorus (ap) in diets for swine with high genetic potential for meat deposition,sixty female commercial hybrid swine were used, with initial weight of 30 ± 0.618 kg, distributed in a completely randomized experimental design, with five treatments, six replications and two animals per experimental unit. the treatments consisted of a basal diet without phosphorus supplementation and another four diets obtained by supplementing the basal diet with dicalcium phosphate to obtain five available phosphorus levels (0.115, 0.195, 0.275, 0.355 and 0.435%). no effect of the available phosphorus levels was observed on the feed daily intake. the available phosphorus levels influenced linearly the daily weight gain (dwg) and the feed conversion (fc), and the daily weight gain increased up to the level of 0.349% available phosphorus, and remained on a plateau. the feed conversion decreased to 0.345% of available phosphorous and remained on a plateau. the bone strength, phosphorus levels and ash percentage in the bones linearly increased as available phosphorous levels increased in the rations. there was no effect of the available phosphorous levels of the diets on the amount of calcium in the bones. the available phosphorous levels that showed the best results for daily weight gain and feed conversion in female swine with high genetic potential for meat deposition, from 30 to 60 kg, are, respectively, 0.349 e 0.345%, corresponding to the estimated daily intakes of 7.45 and 7.36 g.
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