Eggs Hatchability
Mostrando 1-12 de 71 artigos, teses e dissertações.
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1. Effect of Egg Position in the Incubator on Broiler Hatching Results
ABSTRACT This study investigated whether the effect of egg location during incubation on hatching results in broiler eggs. For this purpose, a total of 756 broiler eggs were incubated for 21 days. The eggs were divided near the door and near the fan, and distributed on top (216 eggs), 324 in the middle (324 eggs), and in the bottom (216 eggs) according to a
Braz. J. Poult. Sci.. Publicado em: 20/12/2019
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2. Effect of In Ovo Feeding of L-Glutamine to Chick Embryos
ABSTRACT In ovo feeding (IOF), injecting nutrients into the amnion of the avian embryo may enhance hatchability, gastrointestinal development and serum metabolism changes. This hypothesis was evaluated with 5 IOF solutions containing L-glutamine. Were used 315 fertile Rhode Island Red eggs were used (breeders with 32-weeks). The experimental design was compl
Braz. J. Poult. Sci.. Publicado em: 20/12/2019
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3. Morphological Investigations of the Effect of Thermal Manipulation During Embryogenesis on Body Performance and Structure of Pectoral and Thigh Muscle of Ross Broiler Chicken
ABSTRACT The aim of this study was to determine the optimum timing of thermal manipulation during early, mid, late and long lasting embryogenesis that may result in improvement of body performance and myofiber development (fiber diameter and thickness of perimysium) of pectoral and thigh muscles by a comparative morphometrical investigation on post-hatch day
Braz. J. Poult. Sci.. Publicado em: 20/12/2019
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4. Biocidal potential of Eugenia pyriformis essential oil in the control of Rhipicephalus (Boophilus) microplus in the free-living cycle
RESUMO: O Brasil dispõe de um dos maiores rebanhos bovinos comerciais do mundo, sendo natural que junto a esse rebanho, coexista uma enorme quantidade de espécies parasitárias; dentre estes o carrapato Rhipicephalus (Boophilus) microplus que interfere na produtividade animal, causando prejuízos à pecuária de corte e leite. A utilização de acaricidas
Pesq. Vet. Bras.. Publicado em: 02/12/2019
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5. Productive Performance, Egg Characteristics and Hatching Traits of Three Chicken Genotypes under Free-Range, Semi-Intensive, and Intensive Housing Systems
ABSTRACT The present study aimed at evaluating the effect of housing system on the live performance, egg quality, and hatching traits of three dual-purpose chicken genotypes. In total, 180 birds, comprising 48 pullets and 12 cockerels from each of three genotypes, were evaluated during the production phase (27-46 weeks). For this, 144 pullets and 36 cockerel
Braz. J. Poult. Sci.. Publicado em: 14/11/2019
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6. Comparison of Several Turning Frequencies During the Storage Period of Red-Legged Partridge (Alectoris rufa) Hatching Eggs
ABSTRACT The effects of three egg-turning regimes during the pre-incubation storage period on egg weight loss, hatchability, embryonic mortality, chick weight at hatching and incubation length of red-legged partridge (Alectoris rufa) compared with unturned eggs were investigated. Two hundred eggs were allocated to four 50-egg batches stored at 15ºC and 80%
Braz. J. Poult. Sci.. Publicado em: 11/11/2019
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7. Effect of Egg Weight on External and Internal Qualities, Physiological and Hatching Success of Japanese Quail Eggs (Coturnix coturnix japonica)
ABSTRACT This experiment was conducted to evaluate the effect of egg weight and egg physical characteristics on embryonic development, hatchability, and hatchling weight of Japanese quails (Coturnix coturnix japonica). In total, 689 eggs were classified in two categories: small (<13.5 g) or large (≥13.5 g), and different external eggshell and internal qual
Braz. J. Poult. Sci.. Publicado em: 11/11/2019
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8. Effects of Incubator Carbon Dioxide and Oxygen Levels, and Egg Weight on Broilers’ Hatchability of Fertile Eggs
ABSTRACT This study investigated the effects of incubator carbon dioxide (CO2) and oxygen (O2) levels, and egg weight (EW) on embryo mortality (EM) and hatchability of fertile eggs (HFE). A total of 1920 hatching eggs were obtained from a middle-aged (41 weeks) ROSS 308 broiler breeder flock. The eggs were classified according to EW as heavy (69.63 ± 0.09 g
Braz. J. Poult. Sci.. Publicado em: 11/11/2019
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9. Response of duck breeders to dietary L-Carnitine supplementation during summer season
Abstract: A total number of 300 (225 ducks and 75 drakes) Sudani ducks, 28-wk-old were divided into five groups to investigate the effects of dietary L-carnitine (LC) supplementation on productive, hatching and physiological performance as well as nutrients digestibility coefficients. The results indicated that the productive performance and Semen quality pa
An. Acad. Bras. Ciênc.. Publicado em: 21/10/2019
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10. Effects of In-Ovo Rutin Injection to Fertile Japanese Quail (Coturnix Coturnix Japonica) Egg on Hatchability, Embryonic Death, Hatchling Weight, and Hatchling Liver Oxidative and Nitrosative Stress
ABSTRACT This study was conducted with the aim of investigating the effects of the antioxidant rutin injected in fertilized quail eggs on incubation parameters and some hatchling liver biochemical parameters. The study was carried out with 6 groups including a control group and 5 different doses of rutin, and it involved 720 fresh Japanese quail (Coturnix co
Braz. J. Poult. Sci.. Publicado em: 02/09/2019
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11. EFEITO IN VITRO E IN VIVO DE EXTRATOS DE Eugenia uniflora EM NEMATÓDEOS GASTRINTESTINAIS DE OVINOS
Resumo Este estudo avaliou a ação in vitro e in vivo de extratos de Eugenia uniflora em nematódeos gastrintestinais de ovinos. No teste de inibição da eclodibilidade dos ovos, extratos aquosos e hidroalcoólicos foram testados nas concentrações de 40 a 1,25 mg/mL. O efeito citotóxico foi mensurado através do ensaio de MTT em células VERO nas concen
Ciênc. anim. bras.. Publicado em: 20/05/2019
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12. CHEMICAL COMPOSITION AND ACARICIDAL ACTIVITIES OF Indigofera suffruticosa ESSENTIAL OIL AGAINST TWO-SPOTTED SPIDER MITE
Laboratory bioassays on fumigation, ovicidal and oviposition deterrence activity of the essential oil from Indigofera suffruticosa and its constituents [eugenol, (E)-asarone, dill apiole, (Z)-asarone, thymol, (E)-nerolidol and safrole] against Tetranychus urticae were carried out. Components of Indigofera leaf oil were characterized by gas chromatography (GC
Quím. Nova. Publicado em: 02/05/2019