Dietary phytase levels on performance and egg quality of Japanese quails

Lima, Heder José D’Ávila; Barreto, Sergio Luiz de Toledo; Donzele, Juarez Lopes; Valeriano, Matheus Henrique; Vieira, Patrícia Aparecida Fontes; Costa, Cinthia Cabral da

doi:10.1590/s1516-35982011000100018

Cited by 6 publications

(6 citation statements)

References 14 publications

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“…Animal improvement allows commercial strains to have different performance. Móri et al (2005) when assessing the potential for egg production and quality from four genetic groups of quail, observed differences between the egg weight in different groups.…”

Section: Resultsmentioning

confidence: 98%

“…The distribution of absolute deviation (Figure 4) indicates that the fuzzy system realistically estimated the weight of the eggs for the environmental conditions in this work, since the deviations were concentrated below 0.20g (79.49%), which represents 2% of the average weight for Japanese quail eggs that is 10g as reported by Albino and Barreto (2003). The development of the membership functions for the output variables was based on field data collection and on research conducted by Pinto et al (2003), Araujo et al (2007), Barreto et al (2007), Umigi et al (2007), Moura et al (2010a), Moura et al (2010b), and Vercese (2010), Lima et al (2011); who reported information regarding egg weight under six temperatures and four humidity levels, totaling twenty-four thermal conditions.…”

Section: Resultsmentioning

confidence: 99%

“…In tropical and subtropical climates, temperature and humidity factors restrict the development, production and reproduction of animals (JÁCOME et al, 2007). For laying quails, the thermo-neutral zone varies from 18 to 22° C and between 65 and 70% relative humidity (LIMA et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Estimate of the weight of japanese quail eggs through fuzzy sets theory

et al. 2012

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Quail breeding is a viable alternative for animal production and due to its low investment, fast return of invested capital, use of small areas and creation of jobs has aroused much interest in Brazil. The aim of this study was to develop a model based on fuzzy set theory to predict the weight of eggs from Japanese quails. The proposed fuzzy model was based on data from field measurement experiments, as well as from literature referring to the influence of environment over the weight of eggs. To develop the fuzzy system, air dry-bulb temperature (t db, ° C) and relative air humidity (RH, %) were defined as input variables and trapezoidal and triangular membership functions were used, respectively. The absolute deviation between the values for observed egg weight and egg weight estimated by the fuzzy system, varied between 0.01 g and 0.32 g, and the average deviation was 0.14 g. The average error found was 2.33%, and the determination coefficient (R²) was equal to 0.668. The fuzzy system developed to estimate the weight of Japanese quail eggs, based on the t db and RH provided low values for absolute deviation and percentage error, allows a realistic estimate of the weight of eggs in different environmental conditions.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

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Estimate of the weight of japanese quail eggs through fuzzy sets theory

et al. 2012

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“…Não foi observado efeito do peso das codornas sobre a idade do primeiro ovo (P>0,05), no entanto Lima et al (11) , afirmam ser necessário observar o peso adequado das codornas ao final da fase de recria, considerando que são aves leves e que pequenas variações no peso corporal podem resultar num aporte físico inadequado para maturação do aparelho reprodutor e início da postura. Entretanto, todos os grupos genéticos estudados apresentaram resultados satisfatórios para a produção de ovos, podendo evidenciar um aporte físico adequado para todas as linhagens estudadas, independente da linhagem.…”

Section: Resultsunclassified

Aspectos Reprodutivos E Desempenho De Diferentes Linhagens De Matrizes De Codornas Japonesas

et al. 2019

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The objective was to evaluate the performance and reproductive parameters of different genetics groups of Japanese quails with different initial weights. The experimental design was completely randomized, with a factorial 3 x 2 (three strains (UEM1, UEM2 and Commercial (COM)) and two weight classes (light and heavy), totaling six treatments. Was used with eight replications, totaling 48 plots. Each plot contained eight birds (two males and six females), with a total of 384 quails. The COM line presented higher live weight at six weeks of age, being UEM 1 and UEM 2 similar to each other. For age at first egg, the COM group equated EMU 1, with EMU 2 being later. For the variable age at 50% of egg production, the COM strain was earlier than the others. No effect of quail weight was observed on the age of the first egg. There was no interaction effect between strain and initial weight of the birds for any of the reproductive performance. Also, it can be observed that there was no difference between the genetic groups or initial body weight for egg production, when considered the period from six to 26 weeks of age. There was no difference between the genetic groups for feed intake during the 20-week period studied and there was no effect of the initial weight of production on this variable. For the results of the feed conversion index kg/eggs, it can be observed that the best results were presented by the groups of the EMU 1 and EMU 2 strains. It was possible to conclude that genetic improvement of Japanese laying quails requires better adjusts and that an unimproved commercial strain may present similar results to the improved lineages.

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“…According to Olukosi et al (2007), various enzyme complexes are used in animal feed to increase the bioavailability of nutrients. Lima et al (2011) evaluated the effect of phytase in CSM diets for laying quails and concluded that production performance and egg quality were improved. However, in the present experiment, because of the formulation strategy ("over the top"), the effects of EC1 containing phytase in CSM diet were not observed.…”

Section: Resultsmentioning

confidence: 99%