Efeitos de programas de iluminação na produção de ovos de codornas (Coturnix coturnix)

Gewehr, Clóvis Eliseu; Cotta, Judas Tadeu de Barros; Oliveira, A.; Freitas, Henrique Jorge de

doi:10.1590/s1413-70542005000400019

Cited by 10 publications

(13 citation statements)

References 13 publications

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“…The results obtained in this study are similar to those reported by Gewehr & Freitas (2007). According to the researchers, testing the lighting programs for laying hens in a region close to the Ecuador axis (3º South latitude and 60° west longitude), the use of approximately 12 hours of natural lighting promoted similar performance to the program using artificial light to provide 16 hours of light for laying hens, leading researchers to conclude that natural light allows keeping the production performance of whiteegg laying hens in tropical conditions.…”

Section: Resultssupporting

confidence: 92%

“…Changes in the feed intake behavior in poultry caused by lighting program were reported by Gewehr et al (2005), Gewehr & Freitas (2007) and Freitas et al (2010). These researchers reported that the similar feed intake between laying hens exposed to lighting programs with shorter light period compared with those subjected to a longer lighting program could be attributed to an adaptation of poultry that might have offset this difference by consuming more feed during the light period to ensure a nutrient intake sufficient to meet their nutritional requirements.…”

Section: Resultsmentioning

confidence: 86%

“…Gewehr & Freitas (2007) presented several reports with absence of effects of lighting program on the egg shell quality measured by the specific weight. In analyzing the data obtained for bone quality of laying hens (Table 4), there was no significant effect (P>0.05) of medium-size limestone, use of artificial light and the interaction between these factors on the bone density measured by the Seedor Index and the amount of mineral matter in the tibia.…”

Section: Resultsmentioning

confidence: 99%

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Limestone particle size and artificial light for laying hens in the second laying cycle

Oliveira¹,

Freitas²,

Filgueira³

et al. 2013

R. Bras. Zootec.

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-The experiment was conducted to evaluate the effects of limestone particle size and the use of artificial light for laying hens in the second laying cycle. We used 240 Hisex White laying hens at 82 weeks of age in a completely randomized design in a 5 × 2 factorial arrangement, resulting in 10 treatments with 4 replicates of 6 birds. The variables were the five particle sizes obtained by increasing the proportion of thick limestone (0, 25, 50, 75 and 100%) compared with thin limestone and two lighting programs: with and without artificial light. Limestone particle size and light did not affect performance or egg quality. However, there were changes in bird feeding schedule throughout the day as a response to the lighting program. Bone quality, density and mineral content of the tibia were not affected by the treatments, but limestone particle size had a quadratic effect of on bone deformity and strength, obtaining maximum inclusion points with 63% and 59% of thick limestone, respectively. The use of large particles of limestone in the diet and the use of a lighting program does not influence the performance and quality of the eggs of laying hens in the second production cycle, but the use of a proportion of 63.3 g of average particle size (0.60 mm) replacing the fine limestone (0.23 mm) per 100 g of total limestone added to the diet improves bone quality in these birds.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

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Limestone particle size and artificial light for laying hens in the second laying cycle

Oliveira¹,

Freitas²,

Filgueira³

et al. 2013

R. Bras. Zootec.

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“…Esta situação também foi observada neste experimento com o resultado do programa contínuo comparado ao intermitente. Gewehr et al (2005) verificou semelhante (P>0,05) produção de ovos em codornas criadas em galpões abertos em fotoperíodo intermitente com duas fotofases de 30min equidistantes e intercalados a luz natural em 15h30min e 8h30min de escuro comparado a um contínuo de 15:30L:8:30E.…”

Section: Programas De Luz Para Poedeiras Semi-pesadasunclassified

“…No entender de Charles e Tucker (1993), as aves são tão geneticamente predispostas à produção de ovos que apresentam-se na atualidade refratárias às mudanças de regime luminoso Programas intermitentes já foram testados em galpões abertos no Brasil. Gewehr et al (2005) concluíram que estes regimes luminosos podem ser aplicados na criação de codornas a partir da 36ª semana de idade. Freitas et al (2005) verificaram a viabilidade destes programas para poedeiras leves.…”

Section: Introductionunclassified

<b>Efeito de diferentes programas de iluminação para poedeiras semi-pesadas criadas em galpões abertos</b><br>doi: 10.5007/2175-7925.2010v23n2p157

et al. 2011

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ResumoAvaliou-se o efeito de programas de iluminação sobre o desempenho zootécnico e qualidade de ovos de poedeiras semi-pesadas. Foram testados três programas de luz: contínuo de 15h (natural+artificial); intermitente (duas fotofases de 15s entre a luz natural) e iluminação natural crescente. Foram utilizadas 192 aves alojadas em galpão dividido em três ambientes de forma que a iluminação de um não interferisse na do outro. O período experimental teve a duração de 112 dias, sendo avaliado o desempenho zootécnico através da produção de ovos, consumo de ração, peso e massa de ovos. A qualidade de ovos foi avaliada através da gravidade específica dos ovos, peso e espessura da casca e Unidade Haugh. O delineamento utilizado foi o inteiramente ao acaso, com oito repetições, sendo as médias dos tratamentos comparadas pelo teste SNK (5%). Nos resultados de desempenho, o consumo de ração e peso dos ovos foram semelhantes (P<0,05) entre os diferentes programas. A produção e massa de ovos foram semelhantes (P<0,05) nas aves submetidas aos programas intermitente e contínuo, e maior (P>0,05) em relação à luz natural. A qualidade dos ovos não foi alterada (P<0,05) pelos programas. Programa de iluminação intermitente pode ser usado em galpões abertos permitindo manter o desempenho zootécnico de poedeiras semi-pesadas sem alterar a qualidade do ovo. Programa de luz natural crescente diminui a produção de ovos. Unitermos: avicultura, galinhas, luz, ovos AbstractEffects of different lighting programs on semi-heavy laying hens reared in open shelters. The effects of of lighting programs on the zootechnic performance and egg quality of semi-heavy laying hens were evaluated. Three light programs were tested: continuous lighting of 15h (artificial+natural), intermittent lighting (two photophases of 15s between the natural light) and natural increased lighting. 192 birds were used, Biotemas, 23 (2): 157-162, junho de 2010

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Laying parameters of meat quails breeders submitted to lighting programs at growing phase

Watanabe

Melo

et al. 2024

Cienc. Rural

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When applied at growing phase, lighting program aims to obtain quails with body weight and physiological maturity suitable for the beginning of laying. This study evaluated lighting programs at growing phase on performance, sexual maturity and egg quality of meat quail breeders (Coturnixcoturnix) at laying phase. From 7 to 49 days of age, 300 female meat quails were subjected to three lighting programs (natural, intermittent and continuous), with 5 replicates of 20 birds each. At 49 days of age, 240 quails were transferred to a shed, maintaining the same experimental conditions. Meat quails submitted to continuous and intermittent lighting programs had higher weight of reproductive system and lower ages for first egg production and to reach 50% of egg production (P < 0.05). Quails submitted to natural lighting had lower feed intake from 49 to 70 and 71 to 92 days of age and worse feed conversion up to 114 days of age. Continuous and intermittent lighting programs resulted in more precocious quails compared to natural lighting program. Quails submitted to natural lighting at growing phase presented lower egg production during all periods, not differing for birds submitted to continuous and intermittent programs from the second period (71 to 92 days of age). Intermittent and continuous lighting result in better feed conversion of breeding quails up to 114 days and a higher percentage of laying (49 to 136 days), reducing the number of days to produce the first egg and to reach 50% of laying, in relation to natural lighting.

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Efeitos de programas de iluminação na produção de ovos de codornas (Coturnix coturnix)

Cited by 10 publications

References 13 publications

Limestone particle size and artificial light for laying hens in the second laying cycle

Limestone particle size and artificial light for laying hens in the second laying cycle

<b>Efeito de diferentes programas de iluminação para poedeiras semi-pesadas criadas em galpões abertos</b><br>doi: 10.5007/2175-7925.2010v23n2p157

Laying parameters of meat quails breeders submitted to lighting programs at growing phase

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