Mestrado em Zootecnia (EVZ)
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Navegando Mestrado em Zootecnia (EVZ) por Por Orientador "Miyagi, Eliane Sayuri"
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Item Parâmetros fisiológicos e tricológicos na avaliação do conforto térmico em bovinos de corte(Universidade Federal de Goiás, 2016-02-29) Mastelaro, Ariadne Pegoraro; Alves, Fabiana Villa; http://lattes.cnpq.br/1153061642306224; Hellmeister Filho, Paulo; http://lattes.cnpq.br/4391389845941028; Miyagi, Eliane Sayuri; http://lattes.cnpq.br/5838290185532582; Miyagi, Eliane Sayuri; Menezes, Gilberto Romeiro de Oliveira; Bocchi, Adriana LuizeThis study aimed to evaluate the physiological responses and morphological characteristics of cattle belonging to four different genetic groups with different degrees of heat adaptability, raised in pastures in the Center - West of Brazil. The experiment was conducted in two experimental periods (March and August 2015), at São Carlos Farm, Três Lagoas (MS). 54 calves recently weaned from four genetic groups were used, 14 Nellore, 14 Senepol, 12 ½ Angus x ½ Nelore and 14 ¼ Brahman ¼Nelore x 2/4 Senepol, with age, in the beginning of the experiment, five seven months. The average weight of the animals was 197.0 kg (Nelore), 169 kg (Senepol), 235 kg (½ Angus x ½ Nellore) and 233 kg (¼ Brahman x ¼ Nellore x 2/4 Senepol). The experimental design was completely randomized, with four treatments (breeds), where repetitions are the animals within each genetic group. They measured the temperature (rectal, superficial skin and superficial hair coat), heart rate, respiratory rate and surface skin temperature, surface temperature of fur and sweat rate. Moreover, it was determined some morphologic characteristics of the dorsal region. To characterize the environment, there were collected dry bulb temperature, black globe temperature, dew point temperature, wind speed and relative humidity, the sun and the shade, to determine the following thermal comfort indexes: index temperature and humidity, globe temperature and humidity index, and radiation heat load. Among the adaptive features, only those relating to the present differences between the experimental groups (p <0.05), and the genetic group ½ Angus x ½ Nellore showed the highest values of length, diameter, number of hair, density medium and thickness of the hair coat cover in both evaluation periods (March and August). For physiological variables, there was no statistical difference between the experimental groups (p> 0.05), a fact that was also found in the evaluated periods (p <0.05). It follows, therefore, that the choice of breeds with characteristics consistent with the breeding environment is an important factor in the production system efficiencyItem Imunocastração em bovinos mestiços sobre o desempenho, características da carcaça e qualidade da carne(Universidade Federal de Goiás, 2017-08-09) Ribeiro, Renata Vaz; Ferro, Rafael Alves da Costa; http://lattes.cnpq.br/4205656482180504; Miyagi, Eliane Sayuri; http://lattes.cnpq.br/5838290185532582; Miyagi, Eliane Sayuri; Santos, Aracele Pinheiro Pales dos; Ferro, Diogo Alves da CostaThe productive chain of beef cattle breeding has been growing every year and also consumers have been increasing their demand regarding the quality of the meat consumed. The castration of the bovine has as benefits the improvement of the quality of the carcass, mainly as for the thickness of subcutaneous fat and tenderness of the meat. In order to avoid stress and problems related to the technique of surgical castration, the immunocast vaccine has been studied in order to determine the influence of this in the performance of the animals and the quality of the carcass and meat. The present work was carried out with the purpose of evaluating the performance, carcass characteristics and meat quality of crossbred and complete immuno-confined bovine animals. The experiment was carried out in São Luís de Montes Belos, in the state of Goiás, composed of thirty crossbred cattle Dutch / Gir in a completely randomized design (DIC), with fifteen animals per treatment (immature and uncastrated). For each group, healthy, clinically healthy cattle with mean initial age of 12 to 14 months and mean initial weight of 235 kg (± 20 kg) were used. After seven days of adaptation the first dose of one ml of the immunocast (Bopriva®, Zoetis Indústria de Produtos Veterinária LTDA, São Paulo, SP, Brazil) (IC - immunocompromised group) was applied in each animal and after 30 days repeated the same dose (as recommended by the manufacturer). It was evaluated the quantitative and qualitative characteristics of the carcass, being the area of loin eye (AOL), subcutaneous fat thickness (EGS), measurement of finishing fat of the picanha (P8), marbling, sensory analysis of coloration and texture. Measurements of the morphological characteristics were performed: carcass length, arm length, arm perimeter, thigh length and thigh perimeter in the right half carcasses. For performance, mean daily weight gain was evaluated; GPT: total weight gain; PAB: slaughter weight; PCQ: warm carcass weight; RC: carcass yield. Regarding meat, analyzes of softness, thaw losses and cooking losses were performed. The GPMD, GPT, PAB and PCQ values did not present significant differences between the treatments (P> 0.05), with the CCOX and RC variables being the only ones that differed statistically (P <0.05). The thickness of the subcutaneous fat was higher in the CI, whereas the marbling value was higher in the NC, but both did not present statistically significant differences (P> 0.05). The values of HR, PCOC and PD did not show significant differences between the treatments (P> 0.05). In conclusion, it was obtained that the use of the immunocast changed only the carcass yield and thigh perimeter characteristics, the other productive performance characteristics as well as the morphometric characteristics were not statistically different, as well as none of the carcass characteristics evaluated. For the meat quality, it was found that the immunoassay vaccine did not influence meat tenderness or water loss by thawing and cooking, demonstrating the need for further studies using the efficiency and economic values of this technique in animals in this age group.Item Ecologia alimentar e composição bromatológica de alimentos do peixe-boi-marinho (Trichechus manatus) na Paraíba(Universidade Federal de Goiás, 2018-03-01) Rodrigues, Fernanda Meneses; Vergara-Parente, Jociery Einhardt; http://lattes.cnpq.br/6053401520703633; Miyagi, Eliane Sayuri; http://lattes.cnpq.br/5838290185532582; Borges, João Carlos Gomes; Peron, Hugo Jayme Mathias Coelho; Miyagi, Eliane SayuriThe manatee (Trichechus manatus) is an endangered herbivorous aquatic mammal, which has coastal habits and is distributed from the southeastern United States to the northeastern coast of Brazil. Although the evaluation of their eating habits is consolidated, there are data available on the nutritional composition of foods consumed in wildlife. Considering this fact, the present study aimed at the nutritional composition of the antillene manatee diet, in situ, in conservation units of the Paraíba coast. A total of 31 food items and 20 faecal samples of manatee were collected from the Environmental Protection Area of the Barra of the River Mamanguape and Area of Relevant Ecological Interest Mangrooves of Foz of the River Mamanguape, during two periods of the year (rainy and dry). The food components were submitted to determination of dry matter, neutral detergent fiber, acid detergent fiber, crude protein and mineral matter. As fecal samples were submitted to the qualitative identification of taxonomic group and solid residues. Samples of algae (n = 4), marine angiosperm (n = 1), fragments of plastic bag (n = 6), nylon thread (n = 1), nylon rope, plastic twine (n = 1) and unidentified plant structures. A nutritional composition of food items for scientific literature, except dry matter and mineral matter. This work may support future studies on the nutritional requirements of non-Brazilian manatees and assist in the elaboration of maintenance diets for animals and management plansItem Características bromatológicas e perfil fermentativo da silagem de milheto forrageiro (pennisetun glaucum) aditivado com casca de soja(Universidade Federal de Goiás, 2015-10-13) Silva, Renan Sousa da; Rosa, Beneval; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783900J0; Miyagi, Eliane Sayuri; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4761394J4; Miyagi, Eliane Sayuri; Eichler, Verner; França, Aldi Fernandes de SouzaThe ensiling process is a much used alternative in animal husbandry systems, consisting in the preservation of moist forage, fresh-cut or pre-dried, with high nutritional value, to be administered in times of food shortages. Brazil is characterized by a strong seasonality and basically has two distinct seasons in some regions of the country, one high and one low rainfall. The tropical grasses used in Brazilian pastures lose their quality and produce less in times of drought and low temperatures. All these factors justify the use of silage technique. The objective of this study is to evaluate four different levels of inclusion of soybean hulls in millet forage silage in order to determine the nutritional increments that it provided, in addition to analyzing the fermentation process associated losses of the silage process. The bromotalógica composition was positively affected by the inclusion of soybean hulls, with .lineares increases in DM and CP levels. The NDF also an increase in the levels. The inclusion of soybean hulls in silage millet reduced losses by gases and effluents, keeping stable the recovery of dry matter. The ammonia levels were reduced with the addition of the additive. Soy hulls did not affect the lactic acid content, acetic and butyric within acceptable Nives no statistical difference. The work also revealed a slight decrease in propionic acid. The titratable acidity and pH levels of silage did not differ. Palavras Chaves: