333 resultados para Precocial Chicks


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The genus Salmonella was characterized in 1885. It is divided into two species and six subspecies or subgenera. Belonging to the family Enterobacteriaceae is composed of Gram-negative rods, usually producing mobile gas from glucose, except in those serovars S. gallinarum and S. Pullorum. Salmonela is one of the biggest problems in public health for its wide occurrence in humans and in animals, where they occupy the center of the epidemiology of enteric salmonelosis. These are responsible for significant rates of morbidity and mortality. Several outbreaks of food transmitted diseases are described involving meat birds. Sources of salmonela in broiler chicks infected stem, feed and farm environment. Currently, S. enteritidis and S. typhimurium are the two most prevalent serovars. In this context, the sum is increased resistance to antimicrobial drugs is including the latest generation of its indiscriminate use in veterinary medicine. This fact represents risk to human and animal health. New strategies have been adopted by the Brazilian poultry industry to control salmonela in broilers, but the contamination by this pathogen is still present in slaughterhouses putting public health at risk

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In the process of artificial incubation of fertile eggs of chicken (Gallus gallus domesticus) there are procedures that, they are not hindered the birth, they cause embryonic mortality. Handlings before incubation as disinfection and storage are capable to reduce the embryonic if accomplished of inadequate way viability. Already in the incubation process properly says, irregularities in variables as temperature, turning, humidity and ventilation in the incubator reduce the hatchability, what means that, of the total of fertile eggs there is reduction in the number of born chicks, there is like this the reduction of profit of the incubator, being necessary an analysis of which they interfered in the birth

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Pós-graduação em Zootecnia - FCAV

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Pós-graduação em Zootecnia - FCAV

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Pós-graduação em Zootecnia - FCAV

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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The aim of this research was to evaluate, by preference tests, the ability of perception of broiler chicks in the recognition of objects and foods of different colors. The survey was conducted in Brazil and consisted in the conditioning of 60 sexed one-day-old chicks using 30 male chicks and 30 female chicks for three days with blue balls and red food colors chosen for having opposed chromaticities. After the conditioning phase, a preference test was performed, in which the animals were placed individually in the center of an arena test with four options: red food, blue food, red balls and blue balls. Each bird was measured for 10 minutes. Latency to the first peck and the number of pecks, the number of sequential pecks at each object type or food, the total time the bird in each occupied compartment and the first occupied slot were recorded. According to the results, female chicks are less inhibited when in contact with a new situation when compared with males. However, males were able to establish a standard environment in the conditioning phase and opted for the compartment which was closer to that situation, associating the blue color to the ball and red color to the food. Overall, among the types of object colors and between types of food colors, the birds took less time for the decision on the choice of blue food and blue ball, showing a greater attraction, at first, to this color. Between the two ball colors, shorter latency period, greater number of interactions as well as more time spent on site were related to the blue sphere, verifying greater preference for this object. When evaluating the types of food colors, it was observed that the highest averages related to the number of pecks, and sequential pecks occurred with red food. Therefore, it is concluded that the birds recognized the red and blue food object, with the blue color having greater attractiveness for broiler chicks when compared to red.

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Pós-graduação em Ciência e Tecnologia Animal - FEIS