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Articles by Sarah Sgavioli
Total Records ( 5 ) for Sarah Sgavioli
  Sarah Sgavioli , Vitor Rosa de Almeida , Maria Fernanda F.M. Praes , Tamiris Iara Vicentini , Joao Batista Matos , Viviane de Souza Morita , Euclides Braga Malheiros and Isabel Cristina Boleli
  This study examined whether preincubation injection of vitamin C intra-eggs influences the eggshell mineral absorption, embryo mortality and hematological characteristics of chicks from eggs incubated at usual or hot temperatures. Five hundred fertile eggs from broiler breeder (Cobb®) were used in an experiment consisting of a 5 x 2 factorial arrangement (five treatments: no injection or injection of 0%, 2, 4, or 6% vitamin C/100 μL water; two incubation temperatures: 37.5°C and 39.0°C). The percentages of vitamin C injected into the eggs did not influence the hematological characteristics of the chicks when compared to non-injected controls. However, chicks from eggs injected with 4% vitamin C had a higher total number of Red Blood Cells (RBCs) and levels of Hematocrit (HCT) and Hemoglobin (HGB) when incubation occurred at hot temperatures. The lowest percentage of Phosphorus (P) from the eggshells incubated at hot temperatures was observed with 2% vitamin C and the highest with 6% vitamin C. Embryo mortality was higher in eggs injected with 2 and 4% of vitamin C than in eggs not injected with vitamin C. The data indicate that intra-eggs injected vitamin C influences the phosphorus absorption from the shell and injection of 4% vitamin C improves potential gas transport in the blood of chicks from eggs incubated at hot temperatures but increases the embryo mortality.
  Sarah Sgavioli , Liliana Longo Borges , Vitor Rosa de Almeida , Mariana Thimotheo , Joao Ademir de Oliveira and Isabel Cristina Boleli
  Broiler chicks with high immune defense potential at hatching are of great value to the poultry industry. Heat stress can have immunosuppressive or immune stimulatory effect and Ascorbic Acid (AA) acts as anti-stressor and has important physiological functions in bird immune system development. This study aimed to assess the effect of intra egg injection of AA before incubation on development of the bursa of Fabricius and leukocyte parameters in chicks from eggs incubated at thermoneutral and hot temperatures. Fertile eggs from broiler breeder chickens were used in a 5 × 2 factorial design with 5 treatments (non-injected and thus non-perforated and injected with 0, 2, 4 and 6% AA in 100 μL of water) and 2 incubation temperatures (thermoneutral: 37.5°C and hot: 39.0°C). The total leukocyte count; percentages of thrombocytes, basophils, eosinophils, monocytes and heterophils; weight; and bursal index remained unaffected by incubation temperature and AA dose. Bursal follicle area decreased in chicks from non-injected eggs when incubated at hot temperatures. With intra egg injection of 4 and 6% AA, bursal follicle size increased in eggs incubated at thermoneutral temperature and decreased at hot temperature compared to no AA injection. Cell proliferation in follicles increased by injecting 2% AA, whereas the percentage of lymphocytes increased by injecting 4 and 6% AA. The data show that AA acts as a dose- and temperature-dependent immunomodulator and that 4 and 6% AA doses stimulate egg bursal development and lymphocytosis. These findings suggest that intra egg injection of AA produces chicks with higher potential for immune defense against challenges in the field.
  Alexssandro Zaffari Almeida , Ianglio Marcio Travassos Duarte Jacome , Rafael Aldrighi Tavares , Rodrigo Garrofallo Garcia , Irenilza de Alencar Naas , Fabiana Ribeiro Caldara , Sarah Sgavioli , Bruna Barreto and Luiz Gustavo Rombola
  Light duration, intensity and wavelength are critical environmental stimuli affecting physiology and growth rate of birds. The objective of this trial was to evaluate the effect of emitting diode lux color (LED) as a source of artificial lighting for quail. The study used 120 quails (Coturnix coturnix) distributed in a completely randomized design in 20 cages, with five treatments (LED red, white, Blue, green and yellow), with four repetitions of six birds each, totaling 20 experimental units. Production indices were evaluated weekly: feed intake (g/bird/day), average daily gain (g/bird/day), feed conversion (g/g) and carcass yield (%). For the biometrics analysis of the reproductive system, the length of the oviduct and the total number of ovarian follicles was measured. Using the computer software ASSISTANT, the data were submitted to analysis of variance and the differences compared with Tukey test 5% in case of a significant effect. The results of feed intake, daily weight gain, feed conversion and carcass yield did not differ (p>0.05) between treatments. No differences were found between the average size of the oviduct and between the total number of follicles (p>0.05). Different colors do not influence the early development of the reproductive system of the quails (Coturnix coturnix), showing that it is possible to use the LED lighting system, for quail production.
  Dayane Lilian Pires Iglesias , Sarah Sgavioli , Euclides Braga Malheiros , Rodrigo Garofallo Garcia , Luiz Gustavo Rombola , Fabiana Ribeiro Caldara , Irenilza de Alencar Naas and Isabel Cristina Boleli
  The duration of pre-housing fasting may determine the chick’s weight loss, impairing their performance during the rearing. Management’s practices to minimize the effect of this fast are extremely important to the success of broilers rearing. The aim of this study was to check if the ascorbic acid injection (AA) in egg avoids or minimizes the effects of pre-housing fasting in broilers chicks. Fertile Cobb® broiler eggs from hens at 29 weeks of age were used. The experimental design was completely randomized in a factorial arrangement 2 × 4 × 2, and two sex (males and females), with 4 treatments (non-injected eggs and chicks submitted to fasting; not injected eggs and chicks fed with water and feed ad libitum; eggs injected with 1 μg de AA/150 μL of water and chicks submitted to fasting; eggs injected with 3 μg de AA/150 μL of water and chicks submitted to fasting) with 2 different ages (48 and 72 h after hatching). Eggs injected with 1 mg of AA preincubation has increased the hatching by 14.2% avoiding the negative effect of fasting on the weights of the chicks till 48 h after hatching, however, feed intake after this period of fasting is critical, independent of the AA injection, the association of AA injection and feed intake, are important managements to avoid weight loss of pre-housing chicks.
  Mayara Rodrigues de Santana Eich , Rodrigo Garofallo Garcia , Irenilza de Alencar Naas , Fabiana Ribeiro Caldara , Rodrigo Borille , Ana Flavia Basso Royer and Sarah Sgavioli
  The study aimed to evaluate the behavior of broiler chickens reared in the blue and red light emitting diode (LED), using a fluorescent light as a control. The bird behaviors were recorded at 28, 35 and 42 d of grow-out using video clips. Broilers were randomly distributed in a factorial arrangement of 2 x 3 (two sex and three light sources) using six treatments and four replications. Blue and red LED light source and fluorescent light were tested from the 10th day until the 42nd day of grow-out. Behavioral data were analyzed using ANOVA and Kruskal-Wallis test was applied. An association was found between bird age, sex and source of light in the eating, drinking, preening and foraging behavior. Broilers were more active when exposed to fluorescent light and red LED than the birds exposed to the blue LED light source.
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