White Leghorn
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. Effect of Dietary Inclusion of Sodium Bicarbonate on Digestibility of Nutrients and Immune Response in Caged Layers During the Summer
ABSTRACT The aim of this project was to investigate the effect of dietary inclusion of sodium bicarbonate (NaHCO3) on nutrient digestibility and immune response of caged layers during summer when the temperature exceeds 40 ˚C. For immune response trial, White Leghorn layers (n=160; 24 weeks old) were purchased from a poultry farm and were divided into five
Braz. J. Poult. Sci.. Publicado em: 14/11/2019
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2. Preparation and neutralization efficacy of IgY antibodies raised against Deinagkistrodon acutus venom
Abstract Background The five-paced pit viper (Deinagkistrodon acutus), endemic to China and northern Vietnam, is responsible for most snakebites in the Chinese territory. Antivenom produced from horses is the main treatment for snakebites, but it may cause numerous clinical side effects and have other disadvantages involved in their production such as the
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 06/07/2017
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3. Estimativa de parâmetros genéticos e análises de agrupamento para características de carcaça e qualidade da carne em aves
Resumo: O objetivo deste trabalho foi estimar os parâmetros genéticos para características de carcaça e qualidade da carne de aves, bem como explorar o perfil dos valores genéticos desta população, com uso de análises de agrupamento. Foram utilizados dados de 1.846 aves para estimar os parâmetros genéticos de características de produção e qualid
Pesq. agropec. bras.. Publicado em: 2017-03
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4. Anti-Trimeresurus albolabris venom IgY antibodies: preparation, purification and neutralization efficacy
Abstract Background Snakebite incidence in southwestern China is mainly attributed to one of the several venomous snakes found in the country, the white-lipped green pit viper Trimeresurus albolabris. Since antivenom produced from horses may cause numerous clinical side effects, the present study was conducted aiming to develop an alternative antivenom ant
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 22/09/2016
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5. PRODUCTIVE PERFORMANCE OF WHITE LEGHORN HENS BASED ON THE TYPE OF HOUSING DURING REARING: FLOOR VERSUS CAGE
ABSTRACT Poultry farmers in the southeastern of Mexico consider that the productivity of the hens that comes from rearing on floor has a higher productive performance than reared hens in cages, mainly due to higher percentage of egg laying and lower mortality. The aim of this study was to evaluate the productive performance of the laying hen in relation to t
Rev. Bras. Cienc. Avic.. Publicado em: 2016-09
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6. Yolk Color and Lipid Oxidation of the Eggs of Commercial White Layers Fed Diets Supplemented with Vegetable Oils
ABSTRACT The objective of this study was to evaluate the influence of the supplementation of vegetable oils rich in polyunsaturated fatty acids to the diet of Leghorn layers on yolk color and on yolk lipid oxidation of eggs stored at room temperature for 10 days. Sixty eggs laid by commercial white layers (Lohmann LSL) fed diets supplemented with different v
Rev. Bras. Cienc. Avic.. Publicado em: 2016-03
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7. Growth Performance, Organ Weights and Some Blood Parameters of Replacement Laying Pullets Fed with Increasing Levels of Wheat Bran
ABSTRACTThis study was conducted to determine the growth performance, organ weights, and selected blood parameters of replacement laying pullets (development phase) fed increasing levels of wheat bran (WB). A total of 240 70-d-old White Leghorn pullets (Hybrid L33) were evaluated for seven weeks. Birds were assigned to three dietary treatments according to a
Rev. Bras. Cienc. Avic.. Publicado em: 2015-09
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8. Effect of Fennel (Foeniculum Vulgare Mill.) Used as a Feed Additive on The Egg Quality of Laying Hens Under Heat Stress
In this study, one hundred and twenty 40-wk-old White Leghorn laying hens were submitted to two different thermal conditions (24° C vs. 34° C) and were fed three levels (0, 10, or and 20 g/kg of diet)of fennel fruits (Foeniculum vulgare Mill.) as a feed additive in. This study was carried out according to a factorial design consisting of two temperatures a
Rev. Bras. Cienc. Avic.. Publicado em: 2015-06
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9. Effect of dietary energy concentration on performance parameters and egg quality of white leghorn laying hens
An experiment was carried out with 1200 23-week-old white Dekalb commercial laying hens to investigate production responses, egg quality, and energy utilization of laying hens fed different dietary energy levels at the beginning of lay. Birds were housed and divided in five groups of 240 birds according to dietary apparent metabolizable energy corrected for
Rev. Bras. Cienc. Avic.. Publicado em: 2014-12
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10. Effect of Forced Molting on body characteristics and post-molting egg production performance of Layers in Quetta, Pakistan
White leghorn layer (n=2740), with 85weeksof age, were submitted to forced molting by fasting for 13 days and changes in body characteristics and subsequent laying performance during second laying cycle were evaluated. Live body weight (LBW),ovary weight (OW), oviduct weight (OvW) and oviduct length (OvL) were measured before and after fasting. Post-fasting
Rev. Bras. Cienc. Avic.. Publicado em: 2013-12
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11. Produção e purificação de imunoglobulinas Y policlonais anti-Leptospira spp.
Objetivou-se verificar se galinhas imunizadas com uma solução de Leptospira interrogans inativadas e proteínas de membrana externa do sorovar Hardjo, poderiam produzir anticorpos policlonais específicos anti-leptospiras, detectáveis em testes ELISA. Foram imunizados oito galinhas com 25 semanas de idade, da raça White Leghorn, sendo três imunizadas co
Pesq. Vet. Bras.. Publicado em: 2013-09
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12. Effect of feeding whole linseed as a source of polyunsaturated fatty acids on performance and egg characteristics of laying hens kept at high ambient temperature
The present study was conducted to evaluate the effects of feeding whole linseed on the laying performance and egg characteristics in laying hens kept at high ambient environmental temperatures (average 34 ºC; the diurnal temperature range 26 ºC to 41 ºC). Two hundred and forty 38-wk-old white Leghorn laying hens were fed diets containing 0, 5, 10 or 15%
Rev. Bras. Cienc. Avic.. Publicado em: 2013-03