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| Registros recuperados: 14 | |
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| Maiorka,A; Silva,AVF; Santin,E; Dahlke,F; Bruno,LDG; Boleli,IC; Macari,M; Trautenmuller,H. |
| ABSTRACT The aim of this study was to evaluate the possible effects of glutamine and broiler breeder age on the development of intestinal mucosa in broiler chicks during first week of age. For this purpose, 32 one-day-old broiler chicks were distributed according to a completely randomized experimental design in a 2 x 2 factorial arrangement. Treatments consisted of two broiler breeder ages (30 and 60 weeks) and two dietary glutamine supplementation levels (0% and 1%). The morphological development of intestinal mucosa, particularly villus height and crypt depth, was evaluated. The results showed that the supplementation with 1% of glutamine influenced the development of villus height in the duodenum (p=0.009), jejunum (p = 0.006), and ileum (p = 0.001),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler breeder age; Glutamine; Intestinal mucosa; Morphology. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000100017 |
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| Rosa,PS; Faria Filho,DE; Dahlke,F; Vieira,BS; Macari,M; Furlan,RL. |
| In order to evaluate the effect of energy intake and broiler genotype on performance, carcass yield, and fat deposition, 600 one-day-old male chicks from two different genetic groups (AgRoss 308 - commercial line and PCLC - Embrapa non-improved line) were fed diets with different metabolizable energy level (2950, 3200 and 3450 kcal/kg). A completely randomized experimental design in a 2X3 factorial arrangement with four replications of 25 birds per treatment was applied. In order to ensure different energy intake among treatments within each strain, feed intake was daily adjusted by pair-feeding schemes. AgRoss 308 broilers had better performance and carcass yield, and presented lower abdominal fat deposition rate. In both genetic groups, the highest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometric growth; Broiler chickens; Carcass composition; Energy intake; Genetic strains. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000200007 |
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| Maiorka,A; Dahlke,F; Penz,AM; Kessler,AM. |
| We studied the effects of two different systems of expressing amino acid requirements (total - TAA or digestible - DAA), two energy levels (2,900 or 3,200 kcal of ME/kg) and two physical forms (mash or pellet) on the performance of male broilers from 21 to 42 d of age. Diets formulated on DAA basis improved feed conversion (p<0.001) and the conversion of consumed ME into body weight gain (p<0.001). Birds fed 3,200 kcal ME/kg presented better feed conversion (p<0.001), higher abdominal fat deposition (p<0.001) and worse conversion of consumed ME into body weight gain (p<0.001) as compared to birds fed 2,900 kcal ME/kg. Birds fed pelleted feed had higher feed intake (p<0.001), higher weight gain (p<0.001), better feed conversion... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestible aminoacid; Energy; Ideal protein; Pellet. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000100008 |
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| Opalinski,M; Maiorka,A; Dahlke,F; Cunha,F; Vargas,FSC; Cardozo,E. |
| The objective of this experiment was to evaluate the effect of a probiotic (Bacillus subtilis, strain DSM 17299) in broiler diets on feed intake, weight gain, and feed conversion ratio. The experiment included 1,200 male Ross broilers from 1 to 42 days of age. Birds were randomly allocated to 4 treatments, with 10 replicates of 30 birds. The following treatments were applied: T1 - Negative Control (basal diet, with no added growth promoter; T2 - Negative Control + Bacillus subtilis (8 x 10(5) CFUs/g feed); T3 - Negative Control + Bacillus subtilis (3 x 10(5) CFUs/ g de feed) and T4 - Positive Control (avilamycin + anticoccidial from 1 to 35 days of age). At 21, 35, and 42 days of age, there was an increase of antibiotic-free diet intake as compared to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broilers; Performance; Probiotic. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000200004 |
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| Gonzales,E; Stringhini,JH; Dahlke,F; Cunha,WCP; Xavier,SAG. |
| The study was designed to evaluate the productive consequences of fasting neonatal chicks obtained from strains genetically divergent for growing. Four hundred eight chicks from three strains, 160 from breeders selected for high growth rate and excellent feed conversion ratio (Cobb 500), 160 from breeders not selected for fast growth (JA57), and 160 from a white egg layer strain (Hy-Line W98) were allotted in a 3 (strain) x 2 (fasting period - 8 and 36h after hatching) factorial arrangement with 5 replicates of 16 chicks each. Immediately after hatching, all chicks had similar (P>0.05) relative yolk sac weights (14.13%, 14.50%, and 15.49% for Hy-Line, Cobb, and JA57, respectively). The yolk sac retractions were proportionally higher for Cobb and JA57... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chicks; Fasting; Neonatal; Performance; Yolk sac. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000400010 |
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| Dahlke,F; Ribeiro,AML; Kessler,AM; Lima,AR. |
| Este experimento foi realizado com o objetivo de investigar os efeitos de diferentes granulometrias, expressa em Diâmetro Geométrico Médio (DGM) do milho (0,336mm, 0,585mm, 0,856 mm e 1,12 mm) de dietas fornecidas na forma farelada (FAR) e peletizada (PEL), no desempenho e no rendimento de carcaça e de cortes de frangos de corte de 21 a 42 dias de idade. Dietas FAR, produzidas com DGM de 0,336 mm resultaram em um menor consumo (p<0,001), ganho de peso (p<0,001) e pior conversão alimentar (p<0,001) do que as PEL de mesmo DGM. Os demais DGM não mostraram diferenças entre ração FAR e PEL. Quando avaliada somente a granulometria, observou-se que o aumento no DGM melhorou o ganho de peso linearmente e de forma quadrática o consumo e a conversão... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diâmetro geométrico médio; Milho; Desempenho; Rendimento de carcaça. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000300006 |
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| Santin,E; Maiorka,A; Gama,NMSQ; Dahlke,F; Krabbe,EL; Paulillo,AC. |
| Esse experimento foi realizado com o objetivo de avaliar a ação de produto de exclusão competitiva (EC) sobre os efeitos da ocratoxina A (OA). As aves alimentadas com 2 ppm de OA na dieta reduziram significativamente o consumo de ração e ganho de peso, além de apresentarem pior conversão alimentar quando comparadas às aves não expostas à OA na dieta. O emprego da EC no primeiro dia de vida não minimizou esses efeitos, bem como não afetou os parâmetros zootécnicos estudados. Aves alimentadas com OA apresentaram diminuição nos títulos vacinais contra o vírus da doença de Newcastle, evidenciando-se assim a interferência dessa micotoxina na resposta imune humoral de frangos de corte. De outra forma, a EC não interferiu na resposta imune humoral de frangos de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Frangos de corte; Exclusão competitiva; Mucosa intestinal; Ocratoxina. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000200008 |
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| Dahlke,F; Ribeiro,AML; Kessler,AM; Lima,AR; Maiorka,A. |
| The objective of this experiment was to investigate the effects of different particle sizes, expressed as Geometric Mean Diameter (GMD) of corn (0.336mm, 0.585mm, 0.856mm and 1.12mm) of mash and pelleted broiler chicken diets on the weight of the gizzard, duodenum and jejunum+ileum; on the pH of the gizzard and small intestine and on the characteristics of the duodenal mucous layer (number and height of villi and crypt depth) in 42-day-old broilers. The physical form and the particle size of the diet had no significant effect on gizzard and intestine pH (p > 0.05). A greater gizzard weight was seen in the birds receiving pelleted diet and particle size of 0.336mm (p < 0.008). However, for the particle sizes of 0.856 and 1.12 mm, a greater weight was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crypt depth; Geometric mean diameter; Intestine weight; Intestine pH; Villus height. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000100008 |
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| Maiorka,A; Dahlke,F; Santin,E; Kessler,AM; Penz Jr.,AM. |
| This study was conducted to evaluate the performance and carcass and breast yields of broilers fed two different energy levels (3,200 or 2,900 kcal ME/kg) and two ways of expressing amino acid requirements (total - TAA or digestible - DAA) between 21 and 42 days of age. The results showed that broilers fed the diet containing 3,200 kcal ME/kg had higher weight gain (P=0.015), better feed conversion (P=0.001), and higher abdominal fat deposition (P=0.001) as compared to those fed the diet containing 2,900 kcal ME/kg. Diets formulated on DAA basis promoted higher weight gain (P=0.043), better feed conversion (P=0.010) and better conversion of ME intake into weight gain (P=0.007) as compared to those formulated on TAA basis. The results of this study suggest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acid; Broilers; Energy. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000200003 |
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| Rosa,PS; Faria Filho,DE; Dahlke,F; Vieira,BS; Macari,M; Furlan,RL. |
| In order to evaluate the effects of broiler genotype and of heat exposure on performance, carcass characteristics, and protein and fat accretion, six hundred one-day-old male broilers were randomly assigned in a 2 x 3 factorial arrangement, according to the following factors: genetic group (selected and non-selected broilers) and pair-feeding scheme (Ad32 - reared under heat stress and fed ad libitum; Ad23 - reared at thermoneutrality and fed ad libitum; Pf23 - reared at thermoneutrality and pair fed with Ad32), with a total of six treatments with four replicates of 25 birds each. Independent of pair-feeding scheme, selected broilers showed better feed conversion, higher carcass yield, and lower abdominal fat deposition rate. However, as compared to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometric coefficient; Carcass yield; Genetic improvement; Heat stress. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000300007 |
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| Junqueira,OM; Araújo,LF; Araújo,CSS; Faria,DE; Laurentiz,AC; Dahlke,F. |
| Um experimento foi conduzido para estudar a adição do ovo em pó na dieta de frangos de corte no período de 1 a 28 dias, sendo dividido em duas fases (1 a 7 e 8 a 28 dias). No período de 1 a 7 dias, as aves receberam dietas contendo 0%, 5%, 10%, 15% e 20% de ovo em pó e de 8 a 28 dias de idade as aves foram distribuídas em um arranjo fatorial 2x5 (2 níveis de ovo em pó - 0% e 5% - e os 5 níveis da fase anterior). No período de 1 a 7 dias as aves do tratamento controle apresentaram melhor ganho de peso e as aves alimentadas com dietas contendo 20% de ovo em pó apresentaram menor ganho de peso e pior conversão alimentar. As aves deste mesmo tratamento apresentaram também menor peso e comprimento do intestino. Na segunda fase (8 a 28 dias) não houve interação... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Desempenho; Frangos de corte; Ovo em pó. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000100007 |
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| Sans,ECO; Federici,JF; Dahlke,F; Molento,CFM. |
| Scientific information on the welfare of broilers reared in alternative systems is scarce. The objective of this study was to assess the welfare of free-range broilers using the Welfare Quality® protocol. Free-range broilers reared in ten farms were observed, and measures were made in broilers of five of these farms. The collected data were transformed into scores (0-100), with higher scores indicating better welfare, except for emotional states. Prevalence percentages were calculated for the remaining data. Median (min-max) scores were 81 (63-98) for lameness, 93 (83-99) for hock burn on the farm, 100 (95-100) for plumage cleanliness, 35 (8-70) for podermatitis on the farm, 56 (26-88) for density, 53 (20-53) for dust, 34 (14-67) for litter quality, 93... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feelings; Free range; Protocol; Scores. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300011 |
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| Ribeiro,AML; Dahlke,F; Kessler,AM. |
| The supplementation of vegetal diets with L-methionine (100% molar), methionine hydroxyl analogue (HMB) (88% molar) or DL-methionine (99% molar) was compared as to the performance of broilers allocated in cages and submitted to cyclic heat stress (CHS). The trial was carried out from 21 to 42 days of age. Two levels of synthetic methionine were supplemented for each methionine source (0.1 or 0.3 %), and the control treatment was not supplemented with synthetic methionine (negative control). Statistical analyses included the negative control treatment or were performed in a 3 x 2 factorial design (sources x levels). Addition of synthetic methionine to the basal level containing 0.63 % of total sulphur amino acids significantly improved feed conversion (FC)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Methionine source; Poultry; Sulphur amino acids; Temperature. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000300004 |
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| Muramatsu,K; Maiorka,A; Dahlke,F; Lopes,AS; Pasche,M. |
| The present study evaluated the effect of feed particle size, thermal processing different levels of fat inclusion and of moisture addition on the amount of gelatinized starch in a corn-soybean broiler diet. The different processing factors were combined in a 2 x 4 x 4 x 2 factorial arrangement in a three randomized block design consisting of three production series: two particle sizes (coarse: 1041 microns and medium: 743 microns), four fat inclusion levels at the mixer (15, 25, 35, and 45 g/kg of feed), four moisture addition levels in the conditioner (0, 7, 14, and 21g/kg of feed), and two thermal processing treatments (conditioning-pelleting or conditioning-expanding-pelleting) which resulted in 64 different processed feeds. For the determination of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conditioning; Expander; Gelatinization; Moisture; Starch; Fat. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000400005 |
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| Registros recuperados: 14 | |
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