Morphometric measurements and carcass characteristics of Black Australorp, Naked Neck, and Rhode Island Red crossbreds under alternative production systems / Medições morfométricas e características de carcaça de Black Australorp, Naked Neck e Rhode Island Red crossbreds sob sistemas de produção alternativos

The present trial explained the effect of alternative production systems on growth, morphometric and carcass traits of four different chicken genotypes. The second generation of two genotypes RNN (Rhode Island Red × Naked Neck) and BNN (Black Australorp × Naked Neck) obtained by two self-crosses (RNN × RNN = RR and BNN × BNN = BB) and two reciprocal crosses (RNN × BNN = RB and BNN × RNN = BR) were evaluated in three alternative production systems (conventional cages, enriched cages, and aviary). At the 6th week of age after sexing, a total of 600 birds, comprising 150 from each crossbred with a total of 300 pullets and 300 cockerels were divided into conventional cages, enriched cages, and aviary systems having 200 birds in each.Birds were organized into 3×4 factorial arrangements under Completely Randomized Design (3 production systems × 4 genotypes × 2 sexes × 25 birds = 600 birds). Regarding genotypes, RB and BR males showed higher (p < 0.01) carcass yield, drumstick weight, breast weight, and thigh weight than BB and RR genotypes. Females of BR genotype showed higher (p < 0.01) breast weight, thigh weight and drumstick weight. As far as production systems are concerned, higher (p < 0.01) liver weight, heart weight, breast weight, intestinal weight, drumstick weight, and thigh weight were observed in the males reared in enriched cages compared with conventional cages and aviary system. Females reared in enriched cages showed higher (p < 0.01) heart weight, breast weight, intestinal weight, drumstick weight, and thigh weight when compared with those reared in conventional cages and aviary. It is concluded that chickens (both sexes) of BR and RB genotypes had better morphological measurements and carcass traits than those of RR and BB genotype chickens. Among alternative production systems, chickens reared in enriched cages had better traits than those of reared in conventional cages and aviary during the growing phase.

O presente estudo explicou o efeito de sistemas alternativos de produção sobre o crescimento, características morfométricas e carcaças de quatro genótipos de frango diferentes. A segunda geração de dois genótipos RNN (Rhode Island Red × Naked Neck) e BNN (Black Australorp × Naked Neck) obtida por duas autocruzes (RNN × RNN = RR e B ANN × BNN = BB) e duas cruzes recíprocas (RNN × BNN = RB e BNN × RNN = BR) foi avaliada em três sistemas de produção alternativos (gaiolas convencionais, gaiolas enriquecidas e aviário). Na 6ª semana de idade após o sexo, um total de 600 aves, compostas por 150 de cada raça cruzada com um total de 300 pullets e 300 galos, foi dividido em gaiolas convencionais, gaiolas enriquecidas e sistemas aviários com 200 aves em cada. As aves foram organizadas em 3×4 arranjos fatoriais sob projeto completamente randomizado (3 sistemas de produção × 4 genótipos × 2 sexos × 25 aves = 600 aves). Em relação aos genótipos, os machos RB e BR apresentaram maior rendimento de carcaça (p < 0,01), peso da baqueta, peso mamário e peso da coxa do que os genótipos BB e RR. As fêmeas do genótipo BR apresentaram maior (p < 0,01) peso mamário, peso da coxa e peso da baqueta. No que diz respeito aos sistemas de produção, maior (p < 0,01) peso hepático, peso cardíaco, peso mamário, peso intestinal, peso da baqueta e peso da coxa foram observados nos machos criados em gaiolas enriquecidas em comparação com gaiolas convencionais e sistema aviário. As fêmeas criadas em gaiolas enriquecidas apresentaram maior (p < 0,01) peso cardíaco, peso mamário, peso intestinal, peso da baqueta e peso da coxa quando comparadas com as criadas em gaiolas convencionais e aviárias. Conclui-se que as galinhas (ambos os sexos) dos genótipos BR e RB apresentaram melhores medidas morfológicas e traços de carcaça do que os de frangos genótipos RR e BB. Entre os sistemas de produção alternativos, [...].

Morphometric measurements and carcass characteristics of Black Australorp, Naked Neck, and Rhode Island Red crossbreds under alternative production systems

Abstract The present trial explained the effect of alternative production systems on growth, morphometric and carcass traits of four different chicken genotypes. The second generation of two genotypes RNN (Rhode Island Red × Naked Neck) and BNN (Black Australorp × Naked Neck) obtained by two self-crosses (RNN × RNN = RR and BNN × BNN = BB) and two reciprocal crosses (RNN × BNN = RB and BNN × RNN = BR) were evaluated in three alternative production systems (conventional cages, enriched cages, and aviary). At the 6th week of age after sexing, a total of 600 birds, comprising 150 from each crossbred with a total of 300 pullets and 300 cockerels were divided into conventional cages, enriched cages, and aviary systems having 200 birds in each.Birds were organized into 3×4 factorial arrangements under Completely Randomized Design (3 production systems × 4 genotypes × 2 sexes × 25 birds = 600 birds). Regarding genotypes, RB and BR males showed higher (p 0.01) carcass yield, drumstick weight, breast weight, and thigh weight than BB and RR genotypes. Females of BR genotype showed higher (p 0.01) breast weight, thigh weight and drumstick weight. As far as production systems are concerned, higher (p 0.01) liver weight, heart weight, breast weight, intestinal weight, drumstick weight, and thigh weight were observed in the males reared in enriched cages compared with conventional cages and aviary system. Females reared in enriched cages showed higher (p 0.01) heart weight, breast weight, intestinal weight, drumstick weight, and thigh weight when compared with those reared in conventional cages and aviary. It is concluded that chickens (both sexes) of BR and RB genotypes had better morphological measurements and carcass traits than those of RR and BB genotype chickens. Among alternative production systems, chickens reared in enriched cages had better traits than those of reared in conventional cages and aviary during the growing phase.

Resumo O presente estudo explicou o efeito de sistemas alternativos de produção sobre o crescimento, características morfométricas e carcaças de quatro genótipos de frango diferentes. A segunda geração de dois genótipos RNN (Rhode Island Red × Naked Neck) e BNN (Black Australorp × Naked Neck) obtida por duas autocruzes (RNN × RNN = RR e B ANN × BNN = BB) e duas cruzes recíprocas (RNN × BNN = RB e BNN × RNN = BR) foi avaliada em três sistemas de produção alternativos (gaiolas convencionais, gaiolas enriquecidas e aviário). Na 6ª semana de idade após o sexo, um total de 600 aves, compostas por 150 de cada raça cruzada com um total de 300 pullets e 300 galos, foi dividido em gaiolas convencionais, gaiolas enriquecidas e sistemas aviários com 200 aves em cada. As aves foram organizadas em 3×4 arranjos fatoriais sob projeto completamente randomizado (3 sistemas de produção × 4 genótipos × 2 sexos × 25 aves = 600 aves). Em relação aos genótipos, os machos RB e BR apresentaram maior rendimento de carcaça (p 0,01), peso da baqueta, peso mamário e peso da coxa do que os genótipos BB e RR. As fêmeas do genótipo BR apresentaram maior (p 0,01) peso mamário, peso da coxa e peso da baqueta. No que diz respeito aos sistemas de produção, maior (p 0,01) peso hepático, peso cardíaco, peso mamário, peso intestinal, peso da baqueta e peso da coxa foram observados nos machos criados em gaiolas enriquecidas em comparação com gaiolas convencionais e sistema aviário. As fêmeas criadas em gaiolas enriquecidas apresentaram maior (p 0,01) peso cardíaco, peso mamário, peso intestinal, peso da baqueta e peso da coxa quando comparadas com as criadas em gaiolas convencionais e aviárias. Conclui-se que as galinhas (ambos os sexos) dos genótipos BR e RB apresentaram melhores medidas morfológicas e traços de carcaça do que os de frangos genótipos RR e BB. Entre os sistemas de produção alternativos, as galinhas criadas em gaiolas enriquecidas tinham características melhores do que as criadas em gaiolas convencionais e aviárias durante a fase de cultivo.

Morphometric measurements and carcass characteristics of Black Australorp, Naked Neck, and Rhode Island Red crossbreds under alternative production systems / Medições morfométricas e características de carcaça de Black Australorp, Naked Neck e Rhode Island Red crossbreds sob sistemas de produção alternativos

Abstract The present trial explained the effect of alternative production systems on growth, morphometric and carcass traits of four different chicken genotypes. The second generation of two genotypes RNN (Rhode Island Red × Naked Neck) and BNN (Black Australorp × Naked Neck) obtained by two self-crosses (RNN × RNN = RR and BNN × BNN = BB) and two reciprocal crosses (RNN × BNN = RB and BNN × RNN = BR) were evaluated in three alternative production systems (conventional cages, enriched cages, and aviary). At the 6th week of age after sexing, a total of 600 birds, comprising 150 from each crossbred with a total of 300 pullets and 300 cockerels were divided into conventional cages, enriched cages, and aviary systems having 200 birds in each.Birds were organized into 3×4 factorial arrangements under Completely Randomized Design (3 production systems × 4 genotypes × 2 sexes × 25 birds = 600 birds). Regarding genotypes, RB and BR males showed higher (p < 0.01) carcass yield, drumstick weight, breast weight, and thigh weight than BB and RR genotypes. Females of BR genotype showed higher (p < 0.01) breast weight, thigh weight and drumstick weight. As far as production systems are concerned, higher (p < 0.01) liver weight, heart weight, breast weight, intestinal weight, drumstick weight, and thigh weight were observed in the males reared in enriched cages compared with conventional cages and aviary system. Females reared in enriched cages showed higher (p < 0.01) heart weight, breast weight, intestinal weight, drumstick weight, and thigh weight when compared with those reared in conventional cages and aviary. It is concluded that chickens (both sexes) of BR and RB genotypes had better morphological measurements and carcass traits than those of RR and BB genotype chickens. Among alternative production systems, chickens reared in enriched cages had better traits than those of reared in conventional cages and aviary during the growing phase.

Resumo O presente estudo explicou o efeito de sistemas alternativos de produção sobre o crescimento, características morfométricas e carcaças de quatro genótipos de frango diferentes. A segunda geração de dois genótipos RNN (Rhode Island Red × Naked Neck) e BNN (Black Australorp × Naked Neck) obtida por duas autocruzes (RNN × RNN = RR e B ANN × BNN = BB) e duas cruzes recíprocas (RNN × BNN = RB e BNN × RNN = BR) foi avaliada em três sistemas de produção alternativos (gaiolas convencionais, gaiolas enriquecidas e aviário). Na 6ª semana de idade após o sexo, um total de 600 aves, compostas por 150 de cada raça cruzada com um total de 300 pullets e 300 galos, foi dividido em gaiolas convencionais, gaiolas enriquecidas e sistemas aviários com 200 aves em cada. As aves foram organizadas em 3×4 arranjos fatoriais sob projeto completamente randomizado (3 sistemas de produção × 4 genótipos × 2 sexos × 25 aves = 600 aves). Em relação aos genótipos, os machos RB e BR apresentaram maior rendimento de carcaça (p < 0,01), peso da baqueta, peso mamário e peso da coxa do que os genótipos BB e RR. As fêmeas do genótipo BR apresentaram maior (p < 0,01) peso mamário, peso da coxa e peso da baqueta. No que diz respeito aos sistemas de produção, maior (p < 0,01) peso hepático, peso cardíaco, peso mamário, peso intestinal, peso da baqueta e peso da coxa foram observados nos machos criados em gaiolas enriquecidas em comparação com gaiolas convencionais e sistema aviário. As fêmeas criadas em gaiolas enriquecidas apresentaram maior (p < 0,01) peso cardíaco, peso mamário, peso intestinal, peso da baqueta e peso da coxa quando comparadas com as criadas em gaiolas convencionais e aviárias. Conclui-se que as galinhas (ambos os sexos) dos genótipos BR e RB apresentaram melhores medidas morfológicas e traços de carcaça do que os de frangos genótipos RR e BB. Entre os sistemas de produção alternativos, as galinhas criadas em gaiolas enriquecidas tinham características melhores do que as criadas em gaiolas convencionais e aviárias durante a fase de cultivo.

Morphometric measurements and carcass characteristics of Black Australorp, Naked Neck, and Rhode Island Red crossbreds under alternative production systems / Medições morfométricas e características de carcaça de Black Australorp, Naked Neck e Rhode Island Red crossbreds sob sistemas de produção alternativos

The present trial explained the effect of alternative production systems on growth, morphometric and carcass traits of four different chicken genotypes. The second generation of two genotypes RNN (Rhode Island Red × Naked Neck) and BNN (Black Australorp × Naked Neck) obtained by two self-crosses (RNN × RNN = RR and BNN × BNN = BB) and two reciprocal crosses (RNN × BNN = RB and BNN × RNN = BR) were evaluated in three alternative production systems (conventional cages, enriched cages, and aviary). At the 6th week of age after sexing, a total of 600 birds, comprising 150 from each crossbred with a total of 300 pullets and 300 cockerels were divided into conventional cages, enriched cages, and aviary systems having 200 birds in each.Birds were organized into 3×4 factorial arrangements under Completely Randomized Design (3 production systems × 4 genotypes × 2 sexes × 25 birds = 600 birds). Regarding genotypes, RB and BR males showed higher (p < 0.01) carcass yield, drumstick weight, breast weight, and thigh weight than BB and RR genotypes. Females of BR genotype showed higher (p < 0.01) breast weight, thigh weight and drumstick weight. As far as production systems are concerned, higher (p < 0.01) liver weight, heart weight, breast weight, intestinal weight, drumstick weight, and thigh weight were observed in the males reared in enriched cages compared with conventional cages and aviary system. Females reared in enriched cages showed higher (p < 0.01) heart weight, breast weight, intestinal weight, drumstick weight, and thigh weight when compared with those reared in conventional cages and aviary. It is concluded that chickens (both sexes) of BR and RB genotypes had better morphological measurements and carcass traits than those of RR and BB genotype chickens. Among alternative production systems, chickens reared in enriched cages had better traits than those of reared in conventional cages and aviary during the growing phase.(AU)

O presente estudo explicou o efeito de sistemas alternativos de produção sobre o crescimento, características morfométricas e carcaças de quatro genótipos de frango diferentes. A segunda geração de dois genótipos RNN (Rhode Island Red × Naked Neck) e BNN (Black Australorp × Naked Neck) obtida por duas autocruzes (RNN × RNN = RR e B ANN × BNN = BB) e duas cruzes recíprocas (RNN × BNN = RB e BNN × RNN = BR) foi avaliada em três sistemas de produção alternativos (gaiolas convencionais, gaiolas enriquecidas e aviário). Na 6ª semana de idade após o sexo, um total de 600 aves, compostas por 150 de cada raça cruzada com um total de 300 pullets e 300 galos, foi dividido em gaiolas convencionais, gaiolas enriquecidas e sistemas aviários com 200 aves em cada. As aves foram organizadas em 3×4 arranjos fatoriais sob projeto completamente randomizado (3 sistemas de produção × 4 genótipos × 2 sexos × 25 aves = 600 aves). Em relação aos genótipos, os machos RB e BR apresentaram maior rendimento de carcaça (p < 0,01), peso da baqueta, peso mamário e peso da coxa do que os genótipos BB e RR. As fêmeas do genótipo BR apresentaram maior (p < 0,01) peso mamário, peso da coxa e peso da baqueta. No que diz respeito aos sistemas de produção, maior (p < 0,01) peso hepático, peso cardíaco, peso mamário, peso intestinal, peso da baqueta e peso da coxa foram observados nos machos criados em gaiolas enriquecidas em comparação com gaiolas convencionais e sistema aviário. As fêmeas criadas em gaiolas enriquecidas apresentaram maior (p < 0,01) peso cardíaco, peso mamário, peso intestinal, peso da baqueta e peso da coxa quando comparadas com as criadas em gaiolas convencionais e aviárias. Conclui-se que as galinhas (ambos os sexos) dos genótipos BR e RB apresentaram melhores medidas morfológicas e traços de carcaça do que os de frangos genótipos RR e BB. Entre os sistemas de produção alternativos, [...].(AU)

Effects of Moringa oleifera leaf meal on performance and carcass yield of broilers

This study evaluated the effects of including Moringa oleifera (moringa) leaf meal on performance, carcass yield and characteristics, and relative organ weights of broilers from 10 to 42 days of age. We distributed 420 male Cobb 500 chicks in a completely randomized design with five treatments and six replicates with 14 birds each. Treatments consisted of five experimental diets in which the moringa leaf meal was included at 0, 1.5, 3.0, 4.5, and 6.0% in the diets. The following performance variables were evaluated: weight gain, feed intake, and feed conversion; weights and yields of carcass, carcass traits, organs, and abdominal fat; and feet color. Significant differences between the treatment means were analyzed by Dunnett's test. The meal inclusion levels did not affect performance, carcass characteristics and yield, or organs weight. However, feet pigmentation increased linearly, and abdominal fat was greater only at the 1.5% level when compared with the control group. Moringa leaf meal can be included in the diet of broilers from 10 to 42 days of age, up to the level of 6%, without compromising performance or carcass yield of these birds.(AU)

Response of Broiler Chicks to Dietary L-Leucine Supplementation in the Starter Period

ABSTRACT This experiment was conducted to investigate the effects of leucine (Leu) supplementation on performance and carcass traits of broilers along with the re-evaluation of standardized ileal digestible (SID) Leu requirement of broiler chicks on days 0-14. Birds were fed seven experimental diets with SID Leu levels of 16.3 (basal), 17.3, 18.3, 19.3, 20.3, 21.3, and 22.3 g/kg. Some 280 male broiler chicks were randomly assigned to the seven dietary treatments in a completely randomized design with five replicates. Dietary SID Leu levels had significant effects on body weight gain(BWG), feed conversion ratio(FCR), carcass, and breast percentages. BWG increased (p 0.05) when the broilers fed diets with 18.3 to 21.3 g/kg SID Leu compared to the basal diet. FCR decreased (p 0.05) by dietary SID Leu levels of 18.3 to 21.3 g/kg in comparison with the basal diet. Carcass yield increased (p 0.05) by SID Leu levels of 19.3 to 21.3 g/kg. Breast percentage increased (p 0.01) when the broilers received diets with 18.3 to 22.3 g/kg SID Leu and the highest value obtained by the SID Leu level of 21.3 g/kg. Abdominal fat decreased linearly by Leu supplementation (p 0.01). Regression analysis indicated the SID Leu requirement of 18.67, 18.88, and 19.85 g/kg for BWG, FCR, and breast meat yield, respectively. It can be concluded that broiler performance characteristics, especially breast yield, improve by Leu supplementation. Based on the results, the Leu requirement of modern broilers has increased dramatically due to genetic selection for a higher growth rate.

Dietary supplementation of chromium for finishing pigs / Suplementação de cromo na dieta de suínos em terminação

Increasing fat deposition and feed conversion ratio over the days in finishing phase directly influence pork quality and productive profitability. Nonetheless, the slaughter of heavier pigs can result in benefits for the slaughterhouse due to dilution of production and processing costs, as well as economic benefits for the pig producer resulting from the dilution of production costs. Therefore, dietary supplementation of chromium for finishing pigs of high lean-genotypes is a strategy to increase lean tissue accretion and minimize fat deposition, reflecting positively on growth performance. This review discussed recent studies results and mechanisms of action of this modifier of performance and carcass a traits in finishing pigs. Chromium increases the insulin action, facilitating insulin binding to the receptors on cell membrane. As a result, insulin-sensitive cells uptake more glucose, which will be later converted into energy. This additional energy is use to increase protein synthesis, thereby increasing the amount of lean tissue and reducing fat content in the carcass, without altering protein intake by pigs. Chromium also reduces lipid oxidation rate maintaining meat quality for longer period. In conclusion, dietary Cr supplementation for finishing pigs have shown that 0.2 mg/kg of organic Cr sources for pigs from ~60 kg until the slaughter can improve growth performance, lean gain and reduce fat content in carcass. However, the development of nanotechnology has allowed the use of inorganic Cr source at 0.2 mg/kg of inclusion, leading to improve the growth performance and carcass traits of finishing pigs.(AU)

O aumento na deposição de gordura e da conversão alimentar durante a fase de terminação são fatores que implicam diretamente na qualidade da carne e também na rentabilidade da cadeia produtiva. Apesar disso, o abate tardio dos suínos pode resultar em benefícios para o frigorífico, pela redução dos custos operacionais por suíno abatido e melhor utilização dos equipamentos, bem como vantagens econômicas para o produtor resultantes da diluição dos custos de produção. Portanto, a suplementação de cromo na ração de suínos de linhagens com maior potencial para deposição de músculo, é uma estratégia para aumentar a deposição de tecido magro e minimizar a deposição de gordura, refletindo positivamente no desempenho. Em vista disso, objetivou-se com este trabalho, apresentar e discutir os mecanismos de ação, finalidades e resultados recentes de estudos na literatura sobre a suplementação desse modificador de carcaça na ração de suínos em terminação. O principal papel do cromo é potencializar a ação da insulina, facilitando a ligação entre a insulina e os seus receptores na membrana celular. Com isso, as células sensíveis à insulina captam maior quantidade de glicose, que posteriormente serão convertidas em energia. Essa energia adicional pode ser utilizada para aumentar a síntese proteica, aumentando assim, a quantidade de carne magra e reduzindo o teor de gordura na carcaça, sem alterar o consumo de proteína pelos animais. O cromo também diminui a taxa de oxidação lipídica, mantendo a qualidade da carne por mais tempo. Em conclusão, a suplementação dietética de Cr para suínos em terminação mostra que 0,2 mg/kg de fontes orgânicas de Cr para suínos de ~ 60 kg até o abate podem melhorar o desempenho, ganho de massa magra e reduzir o teor de gordura na carcaça. No entanto, o desenvolvimento da nanotecnologia tem permitido o uso de fonte inorgânica de Cr na dose de 0,2 mg/kg de inclusão, melhorando o desempenho e as características de carcaça de suínos em terminação.(AU)

Sodium Requirement for Muscovy Ducks in Housing

The present study aimed to determine the ideal sodium levels for muscovy ducks in housing. Two hundred and forty muscovy ducks of creole lineage were used, distributed in boxes with water and food ad libitum. The experimental design was completely randomized, where treatments were constituted by six nutritional plans (initial, growth and termination) with different sodium levels, and four replicates of 10 muscovy ducks each. The birds had weekly performance evaluations, and after 90 days, eight birds (four males and four females) in each treatment were slaughtered for evaluation of carcass traits. Data collected were subjected to Tukey test at 5% of significance. Differences were observed (p 0.05) in performance (feed intake and feed conversion), where average levels of sodium presented better results. In carcass yields, average levels presented a positive influence (p 0.05) on muscovy duck growth. Male muscovy ducks presented better feed efficiency than females in the same period. The present study indicates that nutritional plan 3 (initial = 0.25%; growth = 0.30% and termination = 0.35%) showed better nutritional requirements of sodium for muscovy ducks in housing, obtaining better performance and carcass development.(AU)

Sodium Requirement for Muscovy Ducks in Housing

The present study aimed to determine the ideal sodium levels for muscovy ducks in housing. Two hundred and forty muscovy ducks of creole lineage were used, distributed in boxes with water and food ad libitum. The experimental design was completely randomized, where treatments were constituted by six nutritional plans (initial, growth and termination) with different sodium levels, and four replicates of 10 muscovy ducks each. The birds had weekly performance evaluations, and after 90 days, eight birds (four males and four females) in each treatment were slaughtered for evaluation of carcass traits. Data collected were subjected to Tukey test at 5% of significance. Differences were observed (p 0.05) in performance (feed intake and feed conversion), where average levels of sodium presented better results. In carcass yields, average levels presented a positive influence (p 0.05) on muscovy duck growth. Male muscovy ducks presented better feed efficiency than females in the same period. The present study indicates that nutritional plan 3 (initial = 0.25%; growth = 0.30% and termination = 0.35%) showed better nutritional requirements of sodium for muscovy ducks in housing, obtaining better performance and carcass development.

Co-supplementation of colostrum powder on performance, intestinal morphology, blood biochemical parameters and antioxidant status of broilers in heat stress / Co-suplementação de pó de colostro no desempenho, morfologia intestinal, parâmetros bioquímicos sanguíneos e status antioxidante de frangos de corte no estresse térmico

This experiment was conducted to investigate the effects of different levels of colostrum powder on performance, intestinal morphology, blood biochemical parameters and antioxidant status of broilers in heat stress. In this experiment 224 Ross-308 broiler chicks were used from 1 to 42 days in 5 treatments and 4 replicates (12 birds per replicate) in a completely randomized design. Treatments included: 1) control (without using colostrum), 2) 0.5% of colostrum, 3) 1% of colostrum, 4) 1.5% of colostrum, and 5) 2% of colostrum powder. Colostrum powder was added in first 10 days of broilers breeding period in their diets. Colostrum powder had significant effects on performance, carcass traits and intestinal cells morphology of broilers in heat stress (P 0.05). The highest villies, the lowest crypts and the highest ratio of villies/crypts were obtained with colostrum powder adding (P > 0.05). Colostrum powder had no significant effects on blood biochemical parameters and antioxidant status of broilers. The overall resulted showed that in broilers in heat stress condition using colostrum powder up to 2% in starter period has beneficial effects on performance, carcass traits and intestinal morphology of broilers.

Este experimento foi conduzido para investigar os efeitos de diferentes níveis de colostro em pó no desempenho, morfologia intestinal, parâmetros bioquímicos sanguíneos e status antioxidante de frangos de corte sob estresse térmico. Neste experimento, 224 pintos de corte Ross-308 foram utilizados de 1a 42 dias em 5 tratamentos e 4 repetições (12 aves por repetição) em um delineamento inteiramente casualizado. Os tratamentos incluíram: 1) controle (sem usar colostro), 2) 0,5% de colostro, 3) 1%de colostro, 4) 1,5% de colostro e 5) 2% de colostro em pó. O colostro em pó foi adicionado nos primeiros 10 dias do período de criação de frangos de corte em suas dietas. O colostro em pó teve efeitos significativos no desempenho, características de carcaça e morfologia das células intestinais de frangos de corte sob estresse térmico (P 0,05). As maiores vilosidades, as menores criptas e a maior proporção de vilosidades/criptas foram obtidas com a adição de colostro em pó (P > 0,05). O colostro em pó não teve efeitos significativos nos parâmetros bioquímicos sanguíneos e no status antioxidante de frangos de corte. O resultado geral mostrou que, em frangos de corte sob estresse por calor, utilizando colostro em pó até 2% no período inicial, possui efeitos benéficos no desempenho, características de carcaça e morfologia intestinal dos frangos.

Co-supplementation of colostrum powder on performance, intestinal morphology, blood biochemical parameters and antioxidant status of broilers in heat stress / Co-suplementação de pó de colostro no desempenho, morfologia intestinal, parâmetros bioquímicos sanguíneos e status antioxidante de frangos de corte no estresse térmico

This experiment was conducted to investigate the effects of different levels of colostrum powder on performance, intestinal morphology, blood biochemical parameters and antioxidant status of broilers in heat stress. In this experiment 224 Ross-308 broiler chicks were used from 1 to 42 days in 5 treatments and 4 replicates (12 birds per replicate) in a completely randomized design. Treatments included: 1) control (without using colostrum), 2) 0.5% of colostrum, 3) 1% of colostrum, 4) 1.5% of colostrum, and 5) 2% of colostrum powder. Colostrum powder was added in first 10 days of broilers breeding period in their diets. Colostrum powder had significant effects on performance, carcass traits and intestinal cells morphology of broilers in heat stress (P < 0.05). In grower period the highest amounts of final body weight and body weight gain were obtained with 2% of colostrum powder. Colostrum powder in contrast to control improved the percentages of gizzard, liver, bursa of fabricious, thighs and breast (P>0.05). The highest villies, the lowest crypts and the highest ratio of villies/crypts were obtained with colostrum powder adding (P > 0.05). Colostrum powder had no significant effects on blood biochemical parameters and antioxidant status of broilers. The overall resulted showed that in broilers in heat stress condition using colostrum powder up to 2% in starter period has beneficial effects on performance, carcass traits and intestinal morphology of broilers.(AU)

Este experimento foi conduzido para investigar os efeitos de diferentes níveis de colostro em pó no desempenho, morfologia intestinal, parâmetros bioquímicos sanguíneos e status antioxidante de frangos de corte sob estresse térmico. Neste experimento, 224 pintos de corte Ross-308 foram utilizados de 1a 42 dias em 5 tratamentos e 4 repetições (12 aves por repetição) em um delineamento inteiramente casualizado. Os tratamentos incluíram: 1) controle (sem usar colostro), 2) 0,5% de colostro, 3) 1%de colostro, 4) 1,5% de colostro e 5) 2% de colostro em pó. O colostro em pó foi adicionado nos primeiros 10 dias do período de criação de frangos de corte em suas dietas. O colostro em pó teve efeitos significativos no desempenho, características de carcaça e morfologia das células intestinais de frangos de corte sob estresse térmico (P < 0,05). No período de crescimento, os maiores peso corporal final e ganho de peso corporal foram obtidos com 2% de de colostro em pó. O colostro em pó, em contraste com o controle, melhorou as porcentagens de moela, fígado, bolsa de fabricious, coxas e peito (P >0,05). As maiores vilosidades, as menores criptas e a maior proporção de vilosidades/criptas foram obtidas com a adição de colostro em pó (P > 0,05). O colostro em pó não teve efeitos significativos nos parâmetros bioquímicos sanguíneos e no status antioxidante de frangos de corte. O resultado geral mostrou que, em frangos de corte sob estresse por calor, utilizando colostro em pó até 2% no período inicial, possui efeitos benéficos no desempenho, características de carcaça e morfologia intestinal dos frangos.(AU)

Castração de bovinos Nelore na terminação em confinamento / Castration of Nellore cattle in feedlot finishing diets

O objetivo do presente estudo foi avaliar o desempenho e características de carcaça de bovinos Nelore castrados e não castrados terminados em confinamento com dieta de alto concentrado. Trinta e seis bovinos machos da raça Nelore com idade de 24 meses, provenientes de recria em sistema de pastejo contínuo, foram divididos em dois grupos de 18 animais (castrados e não castrados) com peso vivo inicial (PVi) médio de 347,5 kg ± 21,61 kg. O delineamento experimental foi em blocos casualizados, divididos de acordo com o PVi para cada condição sexual avaliada, constituindo desta forma dois tratamentos experimentais: animais castrados e animais não castrados. Cada tratamento foi composto por seis baias (3 animais/baia), sendo estas consideradas as unidades experimentais do estudo. O período de confinamento foi de 112 dias, sendo o abate realizado no 113º dia. Foram avaliados a ingestão de matéria seca (IMS), o ganho de peso diário (GPD), conversão alimentar (CA) e eficiência alimentar (EA). Além disso, foram avaliados a deposição de tecido muscular e adiposo por meio de ultrassonografia. Após o abate dos animais foram determinados o peso de carcaça quente (PCQ), o peso de carcaça fria (PCF) e rendimento de carcaça (RC). Os dados foram analisados utilizando-se o programa PROC MIXED do SAS e teste de Tukey (P ≤ 5%). Não houveram diferenças significativas para as variáveis PVi e IMS em porcentagem de PV. Já as variáveis PVf, GPD, CA e EA apresentaram efeitos significativos, tendo o grupo de animais não castrados melhor desempenho produtivo. Para as avaliações de características de carcaça foram observadas diferenças significativas para PCQ e PCF onde os animais do grupo não castrado também apresentaram melhores pesos de carcaça. Portanto, conclui-se que para sistemas de confinamento com dietas de alto teor de concentrado, a castração de bovinos Nelore não é recomendada, pois interferiu negativamente no desempenho produtivo das carcaças dos animais castrados.

The objective of the present study was to evaluate the performance and carcass characteristics of Nelore bulls and steers, finished in feedlot with high concentrate diet. Thirty-six male Nelore cattle with 24 months old, from rearing in a continuous grazing system were divided into two groups of 18 animals (castrated and non-castrated) with initial mean body weight (iBW) of 347.5 kg ± 21.61 kg. The experimental design was a randomized complete block according to iBW for each sexual condition evaluated, constituting two experimental treatments: castrated animals and non-castrated animals. Each treatment consisted of six pens (3 animals/pen), these being considered the experimental units. The feedlot period was 112-days and the slaughter was carried out on the 113th day. The dry matter intake (DMI), average daily gain (ADG), feed conversion (F:G) and feed efficiency (G:F) were evaluated. In addition, the deposition of muscular and adipose tissue was evaluated by means of ultrasonography. After slaughtering of the animals the hot carcass weight (HCW), cold carcass weight (CCW) and carcass yield (YG) were determined. The data were analyzed using thePROC MIXED program from SAS and Tukey test (P ≤ 5%). There was no significant difference for the variables iBW and DMI in percentage of BW. The fBW, ADG, F:G and G:F variables had significant effects, and the group of non-castrated animals obtained abetter productive performance. For the carcass traits evaluations, a significant difference was observed for HCW and CCW, where animals from the non-castrated group also had better carcass data. Therefore, it is concluded that for feedlot systems with highconcentrate diets, castration of Nellore cattle is not recommended because it interfered negatively in the productive performance of the castrated animals.

Levels of substitution of corn by soybean hulls in high-concentrate diets for finishing beef heifers / Níveis de substituição do milho por casca de soja em dietas de alta proporção de concentrado para novilhas em terminação

We examined the production performance of Nellore heifers fed high-concentrate (90%) diets in which ground corn (GC) was substituted by ground soybean hulls (SH) at increasing levels (0, 33, 66, and 100%), in the concentrate portion. A total of 144 heifers (263.40 ± 13.90 kg average initial weight; 27 months old) received the test diets in a feedlot for 112 days. The experiment was set up as a completely randomised design with four treatments. Data were subjected to ANOVA and orthogonal contrasts, adopting α = 5%. The sum of squares of treatments in the contrast analysis was decomposed into two orthogonal contrasts (L - linear and Q - quadratic effect) for the level of SH substituting GC. Dry matter intake was not changed by the GC substitution levels, averaging 2.51% of body weight. There was alinear increase in neutral detergent fibre intake (1.08, 2.03, 2.92, 3.78, 4.85 kg/day) and feed conversion (6.20, 7.08, 7.77, and 8.67 kg/kg); and a linear decrease in total digestible nutrient intake (5.78, 5.16,5.03, 5.12, and 3.66 kg/day), average daily gain (1.24, 1.11, 1.02, and 0.89 kg/day), and slaughter weight (383.52, 374.71, 363.25, and 366.27 kg) as the substitution level was increased (0, 33, 66, and 100%, respectively). Subcutaneous fat thickness and loin-eye area were not influenced (P > 0.05), averaging 5.30 mm and 53.09 cm², respectively. Substituting ground corn by ground soybean hulls inhigh-concentrate diets determined a reduction in production performance of feedlot-finished Nellore heifers.

Foi estudado o desempenho produtivo de novilhas Nelore alimentadas com dietas de alta proporção de concentrado (90%) nas quais o milho moído (MM) foi substituído por casca de soja farelada (CS) em níveis crescentes (0, 33, 66 e 100%) da porção concentrada da dieta. Foram utilizadas 144 novilhas com263,40 ± 13,90 kg de peso inicial médio e 27 meses de idade alimentadas em confinamento durante 112dias. O experimento foi instalado em delineamento inteiramente casualizado com quatro tratamentos. Os dados foram submetidos a ANOVA e contrastes ortogonais, adotando α = 5%. A soma dos quadrados dos tratamentos na análise de contraste foi decomposta em dois contrastes ortogonais [efeito L - linear e Q - quadrático] para o nível de substituição do milho por casca de soja. O consumo de matéria seca não foi alterado pelos níveis de substituição do GC por SH, apresentando média de 2,51% do peso corporal. Houve aumento linear no consumo de fibra em detergente neutro (1,08; 2,03; 2,92; 3,78; 4,85 kg/dia)e conversão alimentar (6,20; 7,08; 7,77; e 8,67 kg/kg); e decréscimo linear na ingestão de nutrientes digestíveis totais (5,78; 5,16; 5,03; 5,12 e 3,66 kg/dia), ganho médio diário (1,24; 1,11; 1,02 e 0,89kg / dia) e peso ao abate (383,52; 374,71; 363,25 e 366,27 kg) à medida que o nível de substituição foi aumentado. A espessura da gordura subcutânea e a área do lombo não foram influenciadas, com média de 5,30 mm e 53,09 cm2, respectivamente. A substituição do milho moído por casca de soja moída em dietas de alto concentrado determinou redução no desempenho produtivo de novilhas Nelore terminadas em confinamento.

Castração de bovinos Nelore na terminação em confinamento / Castration of Nellore cattle in feedlot finishing diets

O objetivo do presente estudo foi avaliar o desempenho e características de carcaça de bovinos Nelore castrados e não castrados terminados em confinamento com dieta de alto concentrado. Trinta e seis bovinos machos da raça Nelore com idade de 24 meses, provenientes de recria em sistema de pastejo contínuo, foram divididos em dois grupos de 18 animais (castrados e não castrados) com peso vivo inicial (PVi) médio de 347,5 kg ± 21,61 kg. O delineamento experimental foi em blocos casualizados, divididos de acordo com o PVi para cada condição sexual avaliada, constituindo desta forma dois tratamentos experimentais: animais castrados e animais não castrados. Cada tratamento foi composto por seis baias (3 animais/baia), sendo estas consideradas as unidades experimentais do estudo. O período de confinamento foi de 112 dias, sendo o abate realizado no 113º dia. Foram avaliados a ingestão de matéria seca (IMS), o ganho de peso diário (GPD), conversão alimentar (CA) e eficiência alimentar (EA). Além disso, foram avaliados a deposição de tecido muscular e adiposo por meio de ultrassonografia. Após o abate dos animais foram determinados o peso de carcaça quente (PCQ), o peso de carcaça fria (PCF) e rendimento de carcaça (RC). Os dados foram analisados utilizando-se o programa PROC MIXED do SAS e teste de Tukey (P ≤ 5%). Não houveram diferenças significativas para as variáveis PVi e IMS em porcentagem de PV. Já as variáveis PVf, GPD, CA e EA apresentaram efeitos significativos, tendo o grupo de animais não castrados melhor desempenho produtivo. Para as avaliações de características de carcaça foram observadas diferenças significativas para PCQ e PCF onde os animais do grupo não castrado também apresentaram melhores pesos de carcaça. Portanto, conclui-se que para sistemas de confinamento com dietas de alto teor de concentrado, a castração de bovinos Nelore não é recomendada, pois interferiu negativamente no desempenho produtivo das carcaças dos animais castrados.(AU)

The objective of the present study was to evaluate the performance and carcass characteristics of Nelore bulls and steers, finished in feedlot with high concentrate diet. Thirty-six male Nelore cattle with 24 months old, from rearing in a continuous grazing system were divided into two groups of 18 animals (castrated and non-castrated) with initial mean body weight (iBW) of 347.5 kg ± 21.61 kg. The experimental design was a randomized complete block according to iBW for each sexual condition evaluated, constituting two experimental treatments: castrated animals and non-castrated animals. Each treatment consisted of six pens (3 animals/pen), these being considered the experimental units. The feedlot period was 112-days and the slaughter was carried out on the 113th day. The dry matter intake (DMI), average daily gain (ADG), feed conversion (F:G) and feed efficiency (G:F) were evaluated. In addition, the deposition of muscular and adipose tissue was evaluated by means of ultrasonography. After slaughtering of the animals the hot carcass weight (HCW), cold carcass weight (CCW) and carcass yield (YG) were determined. The data were analyzed using thePROC MIXED program from SAS and Tukey test (P ≤ 5%). There was no significant difference for the variables iBW and DMI in percentage of BW. The fBW, ADG, F:G and G:F variables had significant effects, and the group of non-castrated animals obtained abetter productive performance. For the carcass traits evaluations, a significant difference was observed for HCW and CCW, where animals from the non-castrated group also had better carcass data. Therefore, it is concluded that for feedlot systems with highconcentrate diets, castration of Nellore cattle is not recommended because it interfered negatively in the productive performance of the castrated animals.(AU)

Levels of substitution of corn by soybean hulls in high-concentrate diets for finishing beef heifers / Níveis de substituição do milho por casca de soja em dietas de alta proporção de concentrado para novilhas em terminação

We examined the production performance of Nellore heifers fed high-concentrate (90%) diets in which ground corn (GC) was substituted by ground soybean hulls (SH) at increasing levels (0, 33, 66, and 100%), in the concentrate portion. A total of 144 heifers (263.40 ± 13.90 kg average initial weight; 27 months old) received the test diets in a feedlot for 112 days. The experiment was set up as a completely randomised design with four treatments. Data were subjected to ANOVA and orthogonal contrasts, adopting α = 5%. The sum of squares of treatments in the contrast analysis was decomposed into two orthogonal contrasts (L - linear and Q - quadratic effect) for the level of SH substituting GC. Dry matter intake was not changed by the GC substitution levels, averaging 2.51% of body weight. There was alinear increase in neutral detergent fibre intake (1.08, 2.03, 2.92, 3.78, 4.85 kg/day) and feed conversion (6.20, 7.08, 7.77, and 8.67 kg/kg); and a linear decrease in total digestible nutrient intake (5.78, 5.16,5.03, 5.12, and 3.66 kg/day), average daily gain (1.24, 1.11, 1.02, and 0.89 kg/day), and slaughter weight (383.52, 374.71, 363.25, and 366.27 kg) as the substitution level was increased (0, 33, 66, and 100%, respectively). Subcutaneous fat thickness and loin-eye area were not influenced (P > 0.05), averaging 5.30 mm and 53.09 cm², respectively. Substituting ground corn by ground soybean hulls inhigh-concentrate diets determined a reduction in production performance of feedlot-finished Nellore heifers.(AU)

Foi estudado o desempenho produtivo de novilhas Nelore alimentadas com dietas de alta proporção de concentrado (90%) nas quais o milho moído (MM) foi substituído por casca de soja farelada (CS) em níveis crescentes (0, 33, 66 e 100%) da porção concentrada da dieta. Foram utilizadas 144 novilhas com263,40 ± 13,90 kg de peso inicial médio e 27 meses de idade alimentadas em confinamento durante 112dias. O experimento foi instalado em delineamento inteiramente casualizado com quatro tratamentos. Os dados foram submetidos a ANOVA e contrastes ortogonais, adotando α = 5%. A soma dos quadrados dos tratamentos na análise de contraste foi decomposta em dois contrastes ortogonais [efeito L - linear e Q - quadrático] para o nível de substituição do milho por casca de soja. O consumo de matéria seca não foi alterado pelos níveis de substituição do GC por SH, apresentando média de 2,51% do peso corporal. Houve aumento linear no consumo de fibra em detergente neutro (1,08; 2,03; 2,92; 3,78; 4,85 kg/dia)e conversão alimentar (6,20; 7,08; 7,77; e 8,67 kg/kg); e decréscimo linear na ingestão de nutrientes digestíveis totais (5,78; 5,16; 5,03; 5,12 e 3,66 kg/dia), ganho médio diário (1,24; 1,11; 1,02 e 0,89kg / dia) e peso ao abate (383,52; 374,71; 363,25 e 366,27 kg) à medida que o nível de substituição foi aumentado. A espessura da gordura subcutânea e a área do lombo não foram influenciadas, com média de 5,30 mm e 53,09 cm2, respectivamente. A substituição do milho moído por casca de soja moída em dietas de alto concentrado determinou redução no desempenho produtivo de novilhas Nelore terminadas em confinamento.(AU)

Expression of Myostatin (Mstn) and Myogenin (Myog) Genes in Zi And Rhine Goose and Their Correlation with Carcass Traits

The aim of this study was to investigate the effects of Myostatin (MSTN) and MyoGenin (MyoG) on goose skeletal muscle growth. In this study, MSTN and MyoG gene expression in breast and leg muscle of Zi and Rhine goose were detected by Real-time Polymerase Chain Reaction (PCR), and the correlations between genes expression levels and carcass traits were investigated. The results showed that the breast muscle weight and breast muscle percentage of Rhine goose were significantly higher than Zi goose (p 0.01). MSTN mRNA and MyoG mRNA expression in breast muscle of Zi goose were significantly higher than that of Rhine goose and the level of MSTN in leg muscle of Rhine was significantly higher than that of Zi goose (p 0.01). There was a significant difference between MSTN mRNA expression in breast muscle and in leg muscle of Zi goose (p 0.01). MSTN mRNA expression in leg muscle was significantly higher than that of breast muscle of Rhine goose (p 0.05). There was a significant difference between MyoG mRNA expression in breast muscle and in leg muscle of Zi goose and Rhine goose (p 0.01). There was a negative correlation between MSTN mRNA expression in breast muscle and body weight, breast muscle weight and breast muscle percentage.(AU)

Expression of Myostatin (Mstn) and Myogenin (Myog) Genes in Zi And Rhine Goose and Their Correlation with Carcass Traits

The aim of this study was to investigate the effects of Myostatin (MSTN) and MyoGenin (MyoG) on goose skeletal muscle growth. In this study, MSTN and MyoG gene expression in breast and leg muscle of Zi and Rhine goose were detected by Real-time Polymerase Chain Reaction (PCR), and the correlations between genes expression levels and carcass traits were investigated. The results showed that the breast muscle weight and breast muscle percentage of Rhine goose were significantly higher than Zi goose (p 0.01). MSTN mRNA and MyoG mRNA expression in breast muscle of Zi goose were significantly higher than that of Rhine goose and the level of MSTN in leg muscle of Rhine was significantly higher than that of Zi goose (p 0.01). There was a significant difference between MSTN mRNA expression in breast muscle and in leg muscle of Zi goose (p 0.01). MSTN mRNA expression in leg muscle was significantly higher than that of breast muscle of Rhine goose (p 0.05). There was a significant difference between MyoG mRNA expression in breast muscle and in leg muscle of Zi goose and Rhine goose (p 0.01). There was a negative correlation between MSTN mRNA expression in breast muscle and body weight, breast muscle weight and breast muscle percentage.

Technical Cashew Nutshell Liquid in Diets of Growing Meat-Type Quails

The aim of this study was to evaluate the inclusion of technical cashew nutshell liquid (TCNSL) in European quails (Coturnix coturnix coturnix) diets from 1 to 35 days of age on the performance, carcass traits, and development of the digestive organs. 575 quails were distributed in a completely randomized design with five treatments (0%, 0.25%, 0.50%, 0.75%, and 1.00% TCNSL), five replicates, and 23 birds per experimental unit. Live performance was evaluated by weight gain, average feed intake, and feed to conversion ratio. The relative weight of the digestive organs (proventriculus, gizzard, pancreas, liver, small intestine, and large intestine), length of the small and large intestine, and carcass and parts yield (breast, wing, and leg) were determined at the end of the experimental period (35 days). The supplementation of quail diets with TCNSL did not influence live performance or carcass and parts yields. The relative weights of the proventriculus, gizzard, pancreas, small intestine, and large intestine, and the length of the small intestine and large intestine were not affected by the dietary inclusion of TCNSL. However, TCNSL supplementation had a quadratic effect (p 0.05) on liver relative weight, with the lowest relative weight predicted at 0.33% TCNSL. Quails fed 1% TCNSL showed higher liver relative weight compared with those fed the TCNSL-free diets. The dietary inclusion of up to 1% TCNSL did not influence the performance, carcass traits, or development of the digestive organs of European quails.(AU)

Comparative Study on Carcass Traits, Meat Quality and Taste in Broiler, Broiler Breeder and Aseel Chickens

Present study evaluated carcass and meat quality attributes of broilers, broiler breeders and Aseel chickens. Sixty birds from each chicken genotype (broiler, broiler breeder and Aseel chickens; five-wk-old broilers and 60-wk-old Aseel chickens and broiler breeders) were evaluated. Birds were maintained under similar environment for 21 days, and then slaughtered to analyze their carcass qualitative and organoleptic characteristics. No carcass yield differences were detected among genotypes. Aseel chickens had heavier neck, followed by broiler breeder and broiler (p 0.0001). Higher liver (p 0.0001), intestine (p 0.0001), ribs and back (p=0.0014) yields were obtained in broilers than in broiler breeders and Aseel chickens. Females showed higher gizzard (p=0.0107) and intestine (p=0.0170) yield than males, which presented higher carcass (p=0.0023), thigh (p=0.0039), drumstick (p 0.0001), neck (p=0.0003) and heart (p=0.0139) yields. Broiler meat was lighter (p 0.0001) whereas Broiler breeder meat were yellower (p 0.0001) and redder (p 0.0001), ultimate-pH was lower (p=0.0001) for broiler and Aseel meat. Female meat was yellower (p 0.0001) and reddish (p=0.0482). Aseel breast meat scored lower for flavor (p=0.0121), juiciness (p=0.0178) and tenderness (p=0.0477) compared with broiler breeders and broilers, although no differences among genotypes were detected for color, aroma, taste, and acceptability, whereas for thigh meat, Aseel chickens received lower color (p=0.0344) and acceptability (p=0.0398) scores. Interaction effect were significant for carcass, meat quality and sensory evaluation. Carcass characteristics of broilers were comparable with Aseel chickens, while broiler breeder showed better meat quality traits. Broiler and broiler breeder meat scored higher for sensory evaluation. Male birds had higher carcass yield and better meat quality traits compared with females. It is concluded that meat quality attributes vary among the three chicken genotypes.(AU)

Technical Cashew Nutshell Liquid in Diets of Growing Meat-Type Quails

The aim of this study was to evaluate the inclusion of technical cashew nutshell liquid (TCNSL) in European quails (Coturnix coturnix coturnix) diets from 1 to 35 days of age on the performance, carcass traits, and development of the digestive organs. 575 quails were distributed in a completely randomized design with five treatments (0%, 0.25%, 0.50%, 0.75%, and 1.00% TCNSL), five replicates, and 23 birds per experimental unit. Live performance was evaluated by weight gain, average feed intake, and feed to conversion ratio. The relative weight of the digestive organs (proventriculus, gizzard, pancreas, liver, small intestine, and large intestine), length of the small and large intestine, and carcass and parts yield (breast, wing, and leg) were determined at the end of the experimental period (35 days). The supplementation of quail diets with TCNSL did not influence live performance or carcass and parts yields. The relative weights of the proventriculus, gizzard, pancreas, small intestine, and large intestine, and the length of the small intestine and large intestine were not affected by the dietary inclusion of TCNSL. However, TCNSL supplementation had a quadratic effect (p 0.05) on liver relative weight, with the lowest relative weight predicted at 0.33% TCNSL. Quails fed 1% TCNSL showed higher liver relative weight compared with those fed the TCNSL-free diets. The dietary inclusion of up to 1% TCNSL did not influence the performance, carcass traits, or development of the digestive organs of European quails.