Consulta: creatorFacets:"Maiorka,A"
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Effect of Broiler Breeder Age and Glutamine Supplementation on the Development of the Intestinal Mucosa of 7-Day-Old Chicks
Provedor de dados: 89
Autores: 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

Evaluation of yeast cell wall on the performance of broiles fed diets with or without mycotoxins
Provedor de dados: 89
Autores: Santin,E; Paulillo,AC; Nakagui,LSO; Alessi,AC; Maiorka,A.
This experiment aimed at evaluating the effects of the interactions between aflatoxin (500 or 250 ppb) and ochratoxin (500 or 250 ppb), and the possible benefits of adding yeast cell wall to prevent the effects of these mycotoxins in broiler chickens. Relative organ weight gain and live performance were evaluated at 21 and 42 days of age. Results indicated that at the levels of mycotoxins included in the experimental diets, ochratoxin reduced feed intake and body weight gain, and aflatoxin only affect feed intake of 21-day-old birds. No interaction was observed between aflatoxin and ochratoxin at the levels used in experimental study. Yeast cell wall did not significantly reduced the deleterious effects of ochratoxins. No significant differences were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Ochratoxin; Yeast cell wall; Broilers; Performance.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000400004

Utilização de Prebióticos, Probióticos ou Simbióticos em Dietas para Frangos
Provedor de dados: 89
Autores: Maiorka,A; Santin,E; Sugeta,SM; Almeida,JG; Macari,M.
Foi investigado o efeito da substituição de antibióticos por prebiótico, probiótico e simbiótico em dietas para frangos de corte de 1 a 45 dias de idade. Foram utilizados 750 pintos de 1 dia de idade, distribuídos em cinco tratamentos, sendo: T1-sem aditivos, T2-antibiótico (Olaquindox&lt;FONT FACE=Symbol&gt;â&lt;/FONT&gt; e Nitrovin&lt;FONT FACE=Symbol&gt;â&lt;/FONT&gt; ), T3-prebiótico (0,2% de parede celular de S. cerevisiae), T4-probiótico (300 ppm de B. subtilis) e T5-simbiótico (T3 + T4). O desempenho dos frangos de 1-45 dias de idade foi influenciado pelos diferentes tratamentos, sendo o melhor ganho de peso observado em aves que receberam o simbiótico, seguido daquelas com antibiótico, prebiótico e probiótico. O pior ganho de peso foi observado nas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibióticos; Frangos; Prebióticos; Probióticos; Simbióticos.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000100008

Diets formulated on total or digestible amino acid basis with different energy levels and physical form on broiler performance
Provedor de dados: 89
Autores: 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&lt;0.001) and the conversion of consumed ME into body weight gain (p&lt;0.001). Birds fed 3,200 kcal ME/kg presented better feed conversion (p&lt;0.001), higher abdominal fat deposition (p&lt;0.001) and worse conversion of consumed ME into body weight gain (p&lt;0.001) as compared to birds fed 2,900 kcal ME/kg. Birds fed pelleted feed had higher feed intake (p&lt;0.001), higher weight gain (p&lt;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

Effect of broiler breeder age on pancreas enzymes activity and digestive tract weight of embryos and chicks
Provedor de dados: 89
Autores: Maiorka,A; Santin,E; Silva,AVF; Routman,KS; Pizauro Jr.,JM; Macari,M.
A study was carried out to evaluate the effect of broiler breeder age on the development of the digestive tract of embryos and chicks. Fertilized eggs Cobb from 30 and 60 week-old broiler breeder was utilized in this experiment. The results showed that eggs from older (60 weeks of age) broiler breeders were heavier (p = 0.001) than those from younger (30 weeks of age) broiler breeder. In addition, older broiler breeder had larger (p = 0.001) embryos showing a higher yolk sac (p = 0.001) and higher gastrointestinal tract relative weight (p = 0.007) than those from younger broiler breeder. The activities of pancreatic lipase and trypsin enzymes were also higher in embryos from older broiler breeder than those from younger broiler breeder (p = 0.001 and p =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler breeder age; Embryo; Enzymatic activity; Gastrointestinal tract.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000100003

On the use of a probiotic (Bacillus subtilis - strain DSM 17299) as growth promoter in broiler diets
Provedor de dados: 89
Autores: 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

Electrolytic Balance in Broiler Chicks During the First Week of Age
Provedor de dados: 89
Autores: Borges,SA; Maiorka,A; Laurentiz,AC; Fischer da Silva,AV; Santin,E; Ariki,J.
Two experiments were carried out using 712 day-old chicks to evaluate the electrolytic balance (Na+K-Cl) in pre-starter (1-7 days) broiler diets. The feed, based on corn and soybean meal with 21.5 % protein and 2,900 kcal ME/kg, was offered ad libitum. In experiment I, K level was fixed, and Na and Cl levels were changed, using four 4 treatments and eight replicates of 16 birds. In experiment II, increasing levels of Na and K were used, with a total of four treatments and five repetitions of 10 birds. In both experiments, the dietary electrolytic balance was 40; 140; 240 and 340 mEq/kg. Electrolytic balance caused a quadratic effect on weight gain and feed:gain ratio, and a linear increase in feed intake when the electrolytic balance was increased by the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broilers; Chlorine; Electrolytes; Potassium; Sodium.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000200008

Different sodium levels and electrolyte balances in pre-starter diets for broilers
Provedor de dados: 89
Autores: Maiorka,A; Magro,N; Bartels,HAS; Kessler,AM; Penz Jr,AM.
An experiment with 400 one-day-old male chicks (Ross) was conducted to evaluate the effects of different Na levels (0.10, 0.22, 0.34 and 0.46%) and different cation/anion balances (Na+K-Cl) (100, 150, 200, 250 and 300 meq/kg) in pre-starter diets on broiler performance. The corn and soybean-based diets had 22% crude protein and 2,900 kcal/kg metabolizable energy and were fed ad libitum. Performance data showed a positive quadratic effect of increasing Na levels on feed and water consumption, weight gain and feed conversion. Na+K-Cl also had a quadratic influence on feed intake and weight gain. None of the effects tested affected the amount of water measured in excreta. Derivatives of obtained regression equations pointed to optimal Na levels of 0.45% for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Chlorine; Electrolyte balance; Performance; Potassium; Sodium; Water.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000300002

Effect of Selenium Supplementation in Broiler Diets on Breast Meat Deposition
Provedor de dados: 89
Autores: Vieira,VI; Durau,JF; Schramm,VG; Bassi,LS; Oliveira,SG; Maiorka,A.
ABSTRACT The objective of the study was to evaluate the deposition of selenium in the breast muscle of broilers fed different selenium sources during different periods. Two experiments were carried out with broilers fed 45% sodium selenite (SS) or 2% hydroxy-selenomethionine (HSM) to determine the selenium deposition rate in the muscle tissue. In Experiment 1, 48 broilers were distributed in a completely randomized design with six treatments with eight replicates each, consisting of diets containing 0 Se (0), 200 or 400 µgSS/kg (200 SS, 400 SS), or 100, 200, or 300 µgHSM/kg (100 HSM, 200 HSM, 300 HSM) for 10 days. The highest Se breast content was obtained with 300 HSM diet, followed by 200 SS diet compared to the other treatments. Experiment 2 had a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breast muscle; Hydroxy-selenomethionine; Mineral deposition; Sodium selenite.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100312

Desenvolvimento do Trato Gastrointestinal de Embriões Oriundos de Matrizes Pesadas de 30 e 60 Semanas de Idade
Provedor de dados: 89
Autores: Maiorka,A; Santin,E; Fischer da Silva,AV; Bruno,LDG; Boleli,IC; Macari,M.
O objetivo deste trabalho foi investigar o efeito da idade das matrizes pesadas sobre o desenvolvimento do trato gastrointestinal (TGI) dos embriões no terço final do período de incubação, bem como a utilização das reservas do saco vitelino nas 24 h pós-eclosão, em pintos alimentados ou em jejum. Foram utilizados ovos férteis da linhagem Cobb 500, oriundos de matrizes pesadas com 30 e 60 semanas de idade. O desenvolvimento do TGI (proventrículo+moela, segmentos do intestino delgado e saco vitelino) foi estudado entre o 17º e 21º dias de incubação (Experimento 1). Nas 24 h pós-eclosão foi pesquisado o efeito da presença ou não de alimento no lúmen intestinal sobre a utilização das reservas do saco vitelino (Experimento 2). Os achados deste trabalho...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Matrizes pesadas; Embrião; Incubação; Trato grastrointestinal; Saco vitelino.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2000000200003

Efeito da Proteína Bruta e de Diferentes Balanços Eletrolíticos das Dietas Sobre o Desempenho de Frangos no Período Inicial
Provedor de dados: 89
Autores: Borges,SA; Laurentiz,AC; Araújo,LF; Araújo,CSS; Maiorka,A; Ariki,J.
Foram realizados dois experimentos utilizando-se 520 pintos machos de um dia para avaliar o efeito da proteína bruta (PB) e do balanço eletrolítico (Na + K- Cl) sobre o desempenho de frangos de corte no período inicial. O Experimento I (1 a 7 dias de idade das aves) foi realizado em baterias, utilizando-se 160 pintos machos "Cobb", no Experimento II (1 a 21 dias) foram utilizados 360 pintos machos "Aviam Farms" que foram alojados em um galpão experimental dividido em box. Nos dois experimentos as aves foram aquecidas com lâmpadas infravermelhas e receberam água e ração à vontade. O delineamento foi inteiramente casualizado, em um esquema fatorial 2 x 2 (PB x balanço eletrolítico - BE), com 5 repetições e 8 aves por unidade experimental no Experimento I e...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Balanço eletrolítico; Frangos de corte; Período inicial.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000200009

Efeitos de Produto de Exclusão Competitiva na Prevenção dos Efeitos Tóxicos da Ocratoxina A em Frangos
Provedor de dados: 89
Autores: 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

Effect of Broiler Breeder Age on the Intestinal Mucosa Development of the Embryos at 20 Days of Incubation
Provedor de dados: 89
Autores: Maiorka,A; Silva,AVF; Santin,E; Bruno,LDG; Boleli,IC; Macari,M.
ABSTRACT This study investigated the effect of broiler breeder age on the morphological development of the small intestine broiler embryos (villus height, crypt depth, microvillus height, and villus density) at 20 day of incubation. Eggs obtained from 30- and 60-wk-old broiler breeders were used. The results showed that embryos from older broiler breeders presented longer villi in the duodenum, jejunum, and ileum compared with younger broiler breeders. In addition, embryos from older broiler breeders presented deeper crypts in the jejunum and ileum, longer microvilli in jejunal enterocytes, and lower villus density (microvillus number/mm2) in the duodenum and ileum than younger breeders. These results suggest that breeder age influences the gut mucosa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler breeder age; Embryo; Microvillus; Small intestine; Villus.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000600079

Water intake behavior of broiler chickens exposed to heat stress and drinking from bell or and nipple drinkers
Provedor de dados: 89
Autores: Bruno,LDG; Maiorka,A; Macari,M; Furlan,RL; Givisiez,PEN.
The aspects involved in broiler water intake are not well known, despite the importance of water in animal nutrition and physiology. Water intake behavior should be taken into account when deciding on different types of drinkers. Bell and nipple drinkers are the most commonly used in commercial broiler production. Broilers were housed in cages equipped with two different drinker types and raised at two different environmental temperatures (25 and 34 ºC) to evaluate water intake behavior and volume. Broiler water intake behavior was influenced by drinker type. Birds visited bell drinkers less often, but presented higher total water intake per visit to the drinker as compared to those drinking from nipple drinkers. The results of this study suggest that both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior; Broilers; Ingestion pattern; Water.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200009

Ornithine decarboxylase expression in the small intestine of broilers submitted to feed restriction and glutamine supplementation
Provedor de dados: 89
Autores: Fischer da Silva,AV; Borges,SA; Maiorka,A; Givisiez,PEN; Rocha,C; Macari,M.
Six hundred and forty one-day-old Cobb male broilers were used to evaluate ornithine decarboxylase (ODC) expression in the mucosa of the small intestine. Birds were submitted to early feed restriction from 7 to 14 days of age. The provided feed was supplemented with glutamine. A completely randomized design with a 2 x 2 factorial arrangement was used (with or without glutamine, with or without feed restriction). Restricted-fed birds were fed at 30% the amount of the ad libitum fed group from 7 to 14 days of age. Glutamine was added at the level of 1% in the diet supplied from 1 to 28 days of age. Protein concentration in the small intestine mucosa was determined, and ODC expression at 7, 14, 21, and 28 days of age was evaluated by dot blotting. ODC was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed nutrition; Glutamine; Intestinal mucosa; Mucosa growth; Ornitine decarboxylase.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000200006

Effects of corn particle size and physical form of the diet on the gastrointestinal structures of broiler chickens
Provedor de dados: 89
Autores: 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 &gt; 0.05). A greater gizzard weight was seen in the birds receiving pelleted diet and particle size of 0.336mm (p &lt; 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

Effect of energy levels of diets formulated on total or digestible amino acid basis on broiler performance
Provedor de dados: 89
Autores: 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

Impact of particle size, thermal processing, fat inclusion, and moisture addition on starch gelatinization of broiler feeds
Provedor de dados: 89
Autores: 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

Digestibility of dry extruded food in adult dogs and puppies
Provedor de dados: 45
Autores: Zanatta,C.P; Félix,A.P; Brito,C.B.M; Murakami,F; Sabchuk,T.T; Oliveira,S.G; Maiorka,A.
Os diversos alimentos completos para cães existentes no mercado objetivam atender as necessidades nutricionais do animal quanto ao estádio fisiológico, conforme as alterações que possam ocorrer no aproveitamento dos nutrientes. Com a finalidade de comparar os coeficientes de digestibilidade aparente (CDA) e as características das fezes de um alimento seco extrusado de cães adultos e filhotes, foram utilizados 12 cães da raça Beagle, sendo seis adultos, cinco anos, e seis filhotes, cinco-seis meses, mantidos em gaiolas metabólicas e distribuídos em delineamento inteiramente ao acaso. Os animais foram alimentados duas vezes ao dia com um alimento completo seco extrusado para filhotes, por um período de adaptação de cinco dias seguidos por cinco dias de...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Beagle; Adult dog; Puppy; Digestibility.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000300038