Triptofano na alimentação de codornas japonesas nas fases de recria e postura

Rizzo, Pricila Vetrano; Guandolini, Gisele Cristina; Amoroso, Lizandra; Malheiros, Ramon Diniz; Moraes, Vera Maria Barbosa de

doi:10.1590/s1516-35982008000600010

Cited by 12 publications

(8 citation statements)

References 17 publications

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“…Rizzo et al (2008), evaluating the levels of digestible tryptophan (0.27 to 1.02%) in Japanese quails in the growth phase (30 to 44 days old), reported no significant effects on performance, which is in agreement with the present study.…”

Section: Resultssupporting

confidence: 92%

“…Some studies have reported that supplementation of some essential and non-essential amino acids such as glutamine and threonine improve the development and integrity of the intestinal flora, improving the performance of the birds, but no studies were not found in the literature reporting that these changes were promoted by digestible tryptophan in the diets. Different results were reported by Rizzo et al (2008), which showed no effect on any performance variable on different levels of tryptophan to Japanese quails on growth (0.27 to 1.02%) and laying (0.23 to 0.98%). The authors concluded that diets containing same amount of protein and energy could be used 0.27 for growing phase and 0.23% of tryptophan for laying stage.…”

Section: Resultsmentioning

confidence: 60%

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Digestible tryptophan requirements of meat quails in the growth phase

Ton¹,

Furlan²,

Martins³

et al. 2012

R. Bras. Zootec.

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-The objective of this experiment was to estimate the digestible tryptophan (DTrp) requirements for growing meat quails. In the first experiment (1-14 days of age), 1,950 quails were distributed in a completely randomized design, with six levels of DTrp (0.27; 0.30; 0.33; 0.36; 0.39 and 0.42% of diet), five replications and 65 quails per experimental unit.There was a linear increase of feed intake, tryptophan intake, weight gain and body weight with the DTrp levels increase. In the second experiment (15-35 days of age), 1,350 quails were distributed in a completely randomized design, with six levels of DTrp (0.22; 0.25; 0.28; 0.31; 0.34 and 0.37% of diet), five replications and 45 quails per experimental unit. There was a linear increase for tryptophan intake, carcass yield, ash levels and protein deposition rate with the DTrp levels increase.In the third experiment (28-35 days of age), conducted to determine the nitrogen balance, 150 males were housed in galvanized wire cages featuring drinker, feeder and individual metal tray lined with plastic to collect the excreta. The design was completely randomized, with six levels of DTrp (0.22; 0.25; 0.28; 0.31; 0.34 and 0.37% of diet), five replicates and five quails per experimental unit. Linear decrease was observed on the nitrogen balance and metabolization coefficient with the DTrp levels increase. The nutritional requirement of digestible tryptophan for maximum growing of meat quail, in the period from 1 to 14 days of age, is higher or equal to 0.42%; in the period from 15 to 35 days, it is 0.22%.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 60%

Digestible tryptophan requirements of meat quails in the growth phase

Ton¹,

Furlan²,

Martins³

et al. 2012

R. Bras. Zootec.

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“…Results of feed intake, feed conversion (intake/kg of eggs) and viability were in agreement with Rizzo et al (2008), who did not observe any significant differences of these parameters in quails fed diets with increasing dosages of tryptophan, an essential amino-acid precursor for the neurotransmitter serotonin. Neither did Guarini et al (2007) observe effect on the performance of quails fed diets supplemented with kava-kava (Piper methysticum) dry extract, a phytotherapic with anxiolytic/sedative function.…”

Section: Resultssupporting

confidence: 88%

Passionflower supplementation in diets of Japanese qualis at rearing and laying periods

et al. 2010

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-The objective of this study was to assess the effect of the inclusion of passionflower (Passiflora alata) in diets on performance, behavior, heterophil/lymphocyte ratio (H/L), corticosterone plasma levels (CPL) and immune response of quails. The study was carried out using 192 birds, distributed in randomized blocks with 4 diets (0, 125, 250 and 375 and 0, 250, 500 and 750 mg of passionflower/kg of feed for the rearing and laying period, respectively), 8 replicates and 6 birds per experimental unit. The rearing period began when birds were 28 days of age and it lasted for 15 days. In this phase, it was evaluated daily feed intake, daily weight gain, feed conversion, viability, tonic immobility time, intensity of injuries, behavior, heterophil/lymphocyte ratio, and corticosterone plasma levels. Laying phase started when birds were 43 days of age and it finished when they were 140 days of age; it was compesed of six 14-day cycles in which it evaluated feed intake, feed conversion, egg production and quality, viability, tonic immobility time, intensity of injuries, behavior, heterophil/ lymphocyte ratio, corticosterone plasma levels and immune response. In the rearing period, the use of passionflower in the diet of quails influenced the behavioral parameters, and the birds became calmer, mainly at the dosage of 375 mg/kg of ration.However, in the laying period, passionflower was efficient in reducing stress in the quails, and the most promising results are observed when higher dosages of the phytotherapic were applied. Nevertheless, the dose of 750 mg/kg of feeeding reduces egg production, though it does not influence quality of eggs neither immune response of the quails.Key Words: behavior, corticosterone, heterophil/lymphocyte ratio, immune response, stress, tonic immobility Efeitos da utilização de passiflora em rações de codornas japonesas nas fases de recria e postura

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“…In Brazil, the production of quails, especially those destined for egg production, showed a significant increase, associated with the production of laying hens or on small farms as an alternative activity (Rizzo, Guandolini, & Amoroso, 2008). The reason for this success is explained by the quality and high nutritional value of the eggs, which has resulted in widespread acceptance in the consumer market.…”

Section: Introductionmentioning

confidence: 99%

<b>Productivity of japanese quails in relation to body weight at the end of the rearing phase

Filho

Garcia

Molino

et al. 2016

Acta Sci. Anim. Sci.

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ABSTRACT. Two experiments were conducted at different times with the objective of investigating how the body weight of Japanese quails at the end of the rearing period may alter the performance during the laying phase. In both experiments, the birds were distributed in five treatments according to their body weights, which were obtained at 42 and 35 days of age for the first and second experiments respectively, and the following categories were considered for said experiments: very light, light, average, heavy and very heavy. For both experiments, the treatments were distributed in a randomized block design, at eight repetitions per treatment for the first one and six for the second one, both at 18 birds per repetition. During the first experiment, sexual maturity, laying percentage, marketable egg percentage, average egg weight and egg mass, in second experiment, feed consumption, final body weight, eggs per bird present, laying percentage, average egg weight, egg mass and alimentary conversion were evaluated. The results obtained show that Japanese quails whose body weight is lower than 140 grams at 42 days of age, or lower than 120 grams at 35 days of age show significantly worse productive results during the laying phase.Keywords: body development, egg production, quail production, sexual maturity.Produtividade de codornas japonesas em função do peso corporal ao final da fase de recria RESUMO. Dois experimentos foram conduzidos para investigar como o peso corporal de codornas japonesa ao final do período de recria pode alterar os parâmetros de desempenho durante a fase de postura. Nos dois experimentos as aves foram distribuídas em cinco tratamentos em função do peso corporal, estes foram obtidos aos 42 e aos 35 dias de idade, para o primeiro e segundo experimento respectivamente. Para ambos os experimentos foram consideradas as classes: muito leves, leves, peso médio, pesadas e muito pesadas. Os tratamentos foram distribuídos em delineamento em blocos ao acaso, com oito repetições por tratamento para o primeiro experimento e seis repetições por tratamento para o segundo experimento, ambos com 18 aves por repetição. No primeiro experimento, foram avaliados a maturidade sexual, a porcentagem de postura, a porcentagem de ovos comercializados, o peso médio dos ovos e massa de ovos. No segundo experimento foram avaliados o consumo de ração, o peso corporal final, os ovos por ave presente, a porcentagem de postura, o peso médio dos ovos, massa de ovos e a conversão alimentar. Os resultados mostram que codornas com peso corporal inferior a 140 gramas aos 42 dias de vida, ou inferior a 120 gramas aos 35 dias de vida, pioram significativamente os resultados produtivos durante o período de postura.Palavras-chave: peso corporal, produção de ovos, coturnicultura, maturidade sexual.

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Triptofano na alimentação de codornas japonesas nas fases de recria e postura

Cited by 12 publications

References 17 publications

Digestible tryptophan requirements of meat quails in the growth phase

Digestible tryptophan requirements of meat quails in the growth phase

Passionflower supplementation in diets of Japanese qualis at rearing and laying periods

<b>Productivity of japanese quails in relation to body weight at the end of the rearing phase

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