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| Registros recuperados: 1.268 | |
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| Gumus,R; Ercan,N; Imik,H. |
| ABSTRACT Mycotoxins, which are produced by some fungi under improper storage conditions before or after harvesting in plant products, cause acute or chronic toxicities. Ochratoxin A (OA) which is also one of the harmful mycotoxins pose a threat to animal and human health. This study was carried out in order to determine OA levels in mixed feed and feedstuffs materials used in livestock enterprises throughout Sivas province. The 59 mixed feeds and 30 feedstuffs materials collected from different enterprises was analysed. Ochratoxin A concentrations were quantified using immunoassay (ELISA). In result, OA was found to be positive in 64 (71.91%) of the 89 samples analysed, whereas OA was not found in 25 samples (28.09%). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feedstuffs; Laying hen feed; Mixed feed; Ochratoxin A; Sivas.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100085 |
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| Brasil,RJM; Lima,CAR; Machado,NJB; Curvello,FA; Quaresma,DV; Vieites,FM; Sousa,FDR. |
| ABSTRACT Three experiments were conducted to estimate the digestible lysine requirements of slow-growing broilers on their performance, carcass traits, and breast meat quality. Different broilers were evaluated in each experiment. In Experiment 1, broilers were evaluated from 29-49 days of age (grower phase I), in Experiment 2, from 50 to 69 days old (grower phase II), and in Experiment 3, from 70-84 days old (finisher phase). A completely randomized design with five treatments of four replicates each was applied in all experiments. The following dietary digestible lysine values were investigated: 0.871, 1.011, 1.151, 1.291 and 1.431% in Experiment 1; 0.803, 0.943, 1.083, 1.223 and 1.363% in Experiment 2; and 0.766, 0.906, 1.046, 1.186 and 1.326% in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acid; Meat quality; Lysine requirements; Slow-growing broilers. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300555 |
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| Vieira,MM; Kessler,AM; Ribeiro,AML; Silva,ICM; Kunrath,MA. |
| In this study, Hisex Brown layers in lay were evaluated between 40 and 44 weeks of age to evaluate the inclusion of bacterial phytase (Ph) and sodium butyrate (SB) to diets containing different calcium levels (CaL). Performance, average egg weight and eggshell percentage, in addition to nutrient metabolizability and Ca and P balance were evaluated for 28 days. Birds were distributed according to a completely randomized experimental design with a 3x2x2 factorial arrangement, with three calcium levels (2.8, 3.3, 3.8%); the addition or not of phytase (500PhU/kg) and the addition or not of sodium butyrate (20mEq/kg), composing 12 treatments with eight replicates of one bird each. There was no additive effect of phytase or SB on the evaluated responses. Feed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacterial phytase; Brown layers; Ca and P; Metabolizability; Organic acids. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200011 |
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| Filik,G; Coşkun,I; Tekin,OK; Filik,AG. |
| ABSTRACT The present study was conducted to evaluate whether dietary hot pepper waste powder (HPWP) would affect the performance and small intestine histology parameters in Japanese quail chicks. A total of 160, one-day-old Japanese quail chicks were divided into 4 treatment groups of similar mean weight, comprising 4 subgroups of 10 chicks each. Chicks were fed on their basal diet supplemented by 0, 100, 200 or 400 mg/kg of dietary HPWP for each kg of starter (0 to 10 days), grower (11 to 24 days) and finisher (25 to 42 days) diets for 7 weeks. At the end of 42 days of age, 10 birds per subgroup were slaughtered and intestinal samples were taken to evaluate histomorphological analyses. The results showed that dietary HPWP supplementation did not affect... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hot pepper waste powder; Quails; Growth performance; Small intestine; Gut health. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000400304 |
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| Szeleszczuk,Ł; Pisklak,DM; Wawer,I. |
| ABSTRACT The water content of the chicken eggshell has a major influence on gas (CO2 and O2) permeability. Inappropriate water loss during the incubation period increases embryo mortality and decreases chick quality. So far only the procedures that enable to determine the total water content in the eggshell have been described and developed. Our analysis of the 1H MAS NMR spectra of the chicken eggshell samples revealed three signals, differing significantly in the chemical shift and relaxation times (T1) parameters. In this work we have assigned those signals and described the changes in their intensities that occur during the incubation period. Using 1H MAS NMR it is possible to distinguish two types of water reservoirs in the chicken eggshell. This... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water; Chicken eggshell; NMR; Incubation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000600027 |
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| Bavaresco,C; Krabbe,E; Gopinger,E; Sandi,AJ; Martinez,FN; Wernik,B; Roll,VFB. |
| ABSTRACT This study aimed to evaluate the effect of using 500 FTU/kg of hybrid phytase (created from three bacteria - Natuphos E), with or without xylanase and glucanase (560 TXU/kg; 250 TGU/kg) - Natugrain TS, in corn and soybean meal-based diets, with nutritional reductions in metabolizable energy (ME), Ca, and available phosphorus (AP), on performance parameters and production costs in broiler chickens. The 1875chickens were housed in boxes and distributed among 5 treatments with 15 replicates of 25 chickens each. The experiment included a positive control (the diet of which met the nutritional requirements of the birds), two negative controls (with ME reductions of 70 and 100 kcal/kg, and fixed reductions in Ca [0.16%] and AP [0.15%]), and two... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calcium; Cost; Energy; Enzyme; Phosphorus. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100319 |
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| Vetrivel,SC; Chandrakumarmangalam,S. |
| Poultry farming in India, in spite of several constraints, has progressed considerably during the last decade. The present study has been undertaken to examine various aspects related to the growth and development of poultry production in the country. Poultry production in India was confined to backyards till recently. Local breed of birds were reared for the supply of eggs and meat. The increasing demand for poultry products necessitates augmenting the supply by importing improved breeds of poultry. In 1961, the proportion of hybrid populations in the total population of poultry was about 2 percent. Within a couple of decades, these birds have dominated the market sidelining the indigenous birds. The technological advances have revolutionized the role and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eggs; Supply; Production; Technology; Growth; Population. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400001 |
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| Cruz,VC; Fernandez,IB. |
| The present study aimed at evaluating the effect of the dietary inclusion of organic trace minerals selenium and zinc on the performance and internal and external egg quality of Japanese quails submitted to heat stress. Data on egg production, feed conversion (kg feed intake/kg eggs and dozen eggs), egg weight, egg specific gravity, eggshell thickness and weight, Haugh unit, yolk index, albumen index and mortality (%) of 144 quails were evaluated for 112 days, divided in eight cycles of 14 days. Birds were distributed according to a randomized block experimental design into four treatments (control; 0.3ppm Se; 60ppm Zn and 0.3ppm Se + 60ppm Zn) with six replicates each. There were no differences (p> 0.05) in egg production (%), egg mass (g/hen/day),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coturnix; Japanese quails; Performance; Quail eggs. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200002 |
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| Reginatto,MF; Ribeiro,AM; Penz Jr,AM; Kessler,AM; Krabbe,EL. |
| Dois experimentos (EXP) avaliaram os efeitos da redução de proteína bruta (PB) em dietas com alta (A) (3.200kcal EM/kg) e baixa (B) (2.900kcal EM/kg) energia, sobre o desempenho e composição de carcaças de frangos de corte machos. Os níveis de PB foram reduzidos para obter as relações energia: proteína (E:PB) 139, 146, 153 e 160 (kcal/%) para as dietas iniciais (EXP 1), e 160, 167, 174 e 181(kcal/%) para as dietas de crescimento (EXP 2), em ambos os níveis de energia, mantendo constantes os níveis de MET+CIS e LIS. Todas as aves receberam uma mesma dieta antes (EXP 2) ou após (EXP 1) o fornecimento das dietas experimentais. O fornecimento das dietas A proporcionou melhor desempenho, no entanto resultou em maior deposição de gordura nas carcaças. No EXP 1,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Relação energia:proteína; Frangos de corte; Composição de carcaças; Desempenho. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2000000300005 |
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| Wawrzyniak,A; Kapica,M; Stępień-Pyśniak,D; Szewerniak,R; Olejarska,A; Jarosz,Ł. |
| ABSTRACT Many kinds of feed additives can be used in chicken diets to stimulate intestinal morphological maturation and, consequently, intestinal function. The purpose of this study was to evaluate the effect of zeolite on broiler performance, gut morphology and gut digestive enzyme activity. The one-day old broiler chickens Ross 308 were assigned randomly into 3 groups with 30 birds per treatment. The 3 dietary treatments were: basal diet only (control group), basal diet + 2% zeolite, basal diet + 3% zeolite. Morphological and morphometric intestinal assessments were conducted using a light microscope. There was observed increase in villus height, villus perimeter, villus section area and crypt depth throughout duodenum and mid jejunum of the broilers fed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestive enzyme; Histology; Small intestine; Zeolite. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400737 |
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| Gopinger,E; Krabbe,EL; Avila,VS De; Surek,D; Lopes,LS. |
| ABSTRACT The objective of this study was to evaluate different strategies for the oxidative stabilization of rice bran (RB) in the diet of broiler chickens using natural antioxidant additives, synthetic antioxidant additives and heat treatment on performance, breast meat quality and liver fat content and the nutrient digestibility coefficients. Furthermore, the study aimed to evaluate the effects of heat treatment and antioxidants, antioxidant additive treatments, without antioxidants, natural, and synthetic, and to three heat treatments, without heat, dry-heat and moist-heat, after the rice bran was stored for 90 days and then incorporated into the experimental diets. 1080 broilers were arranged in a 3 x 3-factorial randomized design with 10 replicates... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative feedstuff; Meat quality; Poultry; Oxidation; Digestibility. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000400321 |
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| Moraes,VMB; Malheiros,RD; Furlan,RL; Bruno,LDG; Malheiros,EB; Macari,M. |
| The objective of the present study was to assess the development of broiler chicks during the first week post-hatching when reared at three different environmental temperatures. A total of 480 day-old chicks were placed in three environmentally controlled rooms (20, 25 and 35°C) from 1 to 7 days of age. Body weight gain, feed and water intake, as well as liver, gizzard, heart, yolk sac and bursa of Fabricius weights were measured daily. Tibia and femur bones were weighed and their length and width (medial diameter) were also obtained. The chicks reared at 20º C had lower weight gain and ingested less food than chicks reared at 25°C and less water than chicks kept at 35°C. Relative weights of the liver, heart, and gizzard were affected by environmental... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body weight; Bone growth; Chicks; Environmental temperature; Viscera. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000100003 |
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| de,Freitas ES; Back,A. |
| ABSTRACTAvian encephalomyelitis is caused by an Hepatovirus and primarily affects chickens. Chickens of all ages are susceptible to the virus, but the nervous symptoms are manifested only in young chicks, between one to five weeks of age. During the last thirty years, avian encephalomyelitis appeared to be well controlled by breeder vaccination. However, the increase of the number of cases is causing concern in the poultry industry. In the present study, we performed a retrospective analysis of the cases presenting histological lesions compatible with avian encephalomyelitis in broilers. The evaluated cases affected broilers from one to 35 days old from the southern region of Brazil. Only cases with compatible microscopic lesions and associated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reemerging; Disease; Young chickens; Virus. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000300399 |
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| Pereira,REP; Martins,MRFB; Mendes,AA; Almeida,PAZ ICL; Komiyama,CM; Milbradt,EL; Fernandes,BC da S. |
| The Brazilian Ministry of Agriculture (MAPA) regulations establish 12 hours as the maximum pre-slaughter fasting period for broilers; however, many processing plants have considered this time is not sufficient, and consequently return the birds to the farms, with consequent economic losses and welfare problems. Therefore, it is necessary to investigate the possible effects of longer pre-slaughter fasting times. The objective of the present study was to evaluate the effect of pre-slaughter fasting times longer than those established by MAPA on broiler welfare, breast meat quality, and intestinal integrity. Forty 42-d-old broilers were submitted to different pre-slaughter fasting times: group I: 6 hours, group II 9h, group III 12h, and group IV 15h. Bird... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler industry; Stress; Intestinal morphology; Intestinal morphometrics. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200007 |
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| Ajakaiye,JJ; Pérez-Bello,A; Cuesta-Mazorra,M; García-Díaz,JR; Mollineda-Trujillo,Á. |
| A 30-day experiment involving 720 White Leghorn (L33) layer chickens of 39 weeks of age and average live weight of 1.8 ± 0.04 kg was carried out in a completely randomized design to evaluate the effects of vitamins C and E on erythrocyte parameters of layers during natural summer conditions. Birds were allotted to 4 treatments containing 0, 150 mg vitamin C, 150 mg vitamin E, and 150 mg vitamin C plus 150 mg vitamin E/kg feed. Each treatment was replicated four times. The exposure of layers to 31±3 °C and 33±0 °C ambient temperature and 84.6% and 81.5% relative humidity, inside and outside the experimental pen, during the study period caused an increase in temperature humidity index 15.5 above the threshold value of 70 established for this species. Total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Erythrocyte index; Heat stress; Hematocrit; Hemoglobin. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000300010 |
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| Oliveira,ES; Cardozo,MV; Borzi,MM; Borges,CA; Guastalli,EAL; Ávila,FA. |
| ABSTRACT Avian pathogenic Escherichiacoli (APEC) virulence mechanism has been continuously studied and it is believed to be multifactorial and because of this, this work aimed to characterize potentially APEC strains isolated from free-range hens. Isolates were submitted to PCR for the detection of virulence genes, which were of high prevalence. In vivo inoculation of day-old chicks revealed that 49 of these strains were of high and intermediate pathogenicity. In addition, isolates were submitted to antimicrobials susceptibility test with the majority of the strains presenting multiresistance. Phylogenetic analysis showed a greater presence of potentially APEC isolates in-group B2. In addition, high heterogeneity was detected among the isolates byXbaI... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: APEC; Backyard chickens; Colibacillosis; Pathogenicity; Virulence factors. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100326 |
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| Registros recuperados: 1.268 | |
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