Mestrado em Zootecnia (EVZ)
URI Permanente para esta coleção
Navegar
Navegando Mestrado em Zootecnia (EVZ) por Por Orientador "Nunes, Romão da Cunha"
Agora exibindo 1 - 3 de 3
Resultados por página
Opções de Ordenação
Item Qualidade de carne e bem-estar de suínos submetidos a diferentes tamanhos de lote no embarque(Universidade Federal de Goiás, 2017-03-03) Castro, Izabela Cruvinel di; Mascarenhas, Alessandra Gimenez; http://lattes.cnpq.br/9082632592936909; Nunes, Romão da Cunha; http://lattes.cnpq.br/4335133347523404; Nunes, Romão da Cunha; Lopes, João Batista; Stringhini, José HenriquePig production starts on the farms until reaching the final product that is generated in the refrigerator. One of the impasses in the pig termination phase is the best shape and the ideal batch size to be taken to the transport truck for shipment in order to minimize or eliminate animal stress and factors detrimental to carcass and quality Of meat. When driving the pigs to the truck, it is necessary to use management methods that minimize stress. For the conduct of the animals it is necessary to determine the number of animals to be driven at a time since a very large group could be subject to greater stress and agitation which can interfere in the final quality of the meat. The objective was to evaluate the relationship between the size of the group of finished pigs driven to the truck, the influence on meat quality, number of lesions and parameters of animal welfare. The experiment was carried out in five pig growth and finishing farms in the western region of Santa Catarina. Were used 198 finishing pigs of both sexes (females and males), divided in three ways of conduction (lot of three, five and ten animals) were used. The experimental design was completely randomized, with 54 animals from one of the farms (corresponding to three replicates for each treatment) and 36 animals from each farm (representing eight replicates per treatment). The variables analyzed were number of lesions, aspects of meat quality, physiological parameters of stress. Measurements of lesions in the farm, slaughterhouse and slaughterhouse, injuries of the type of fight, density and management, lesions in the loin, palette, leg and total, meat quality parameters in the Longissimus dorsi and Semimembranosus muscle, meat classification in CSR, NFP And RFN, and physiological measures of cortisol and lactate. In all treatments the data were submitted to analysis of variance, through the SAS program, and the means were compared by the Tukey test at 5% of significance. There were no significant differences between batch sizes, for lesions caused on the farm, slaughterhouse, slaughterhouse and totals, as well as between carcass, loin, palette, shank and total cuts. There were differences (p <0.05) in loin lesions, caused by fights where the group of ten animals had a larger number. Density-type lesions were also found in batch treatments of three and five animals when compared to the batch of ten animals. For management-type lesions, there was a statistical difference in the loins of the animals from a group of three animals that had a lower number of lesions when compared to five and ten animals. In the Longissimus dorsi muscle, at 45 minutes post-mortem temperature, there was a significant difference between the treatment of five animals that had a lower temperature than the other treatments. In the Semimembranosus muscle, the temperature 45 minutes post-mortem obtained a difference (p <0.05) in treatments five and ten animals with lower temperatures, when compared to the treatment with three animals. The pH measured 24 hours post mortem in the treatment of five animals is inferior to the other treatments and in the driploss the treatment of five animals obtained greater loss of water. As for the sizes of finishing pig lots driven to the truck, the results indicate that batches of three, five and ten animals can be shipped without impairing the quality of meat and animal welfare.Item Comportamento preferencial de leitões na fase de creche em ambiente enriquecido(Universidade Federal de Goiás, 2016-03-09) Leal, Guilherme Brunno de Medeiros; Di Campos, Melissa Selaysim; http://lattes.cnpq.br/1636247556914689; Nunes, Romão da Cunha; http://lattes.cnpq.br/4335133347523404; Di Campos, Melissa Selaysim; Silva, Ana Carolina de Sousa; Taveira, Rodrigo ZaidenThe welfare's absence in animal breeding has a direct impact on food production, affecting internal trade and especially exports. Environmental enrichment is the improvement of facilities in order to make the environment more appropriate to behavioral needs. Inserting objects in the environment such as, tires, chains, ropes, plastic bottles, wood or plastic bars are the most common types of environmental enrichment. However, only few tests have been made on swine's preference by the types of objects available to enrich its environment. It was aimed to evaluate the preferred behavior, as well as, animal performance (daily feed intake, daily weight gain, feed conversion) and lesion rates in pigs in the nursery stage using different types of objects (tire and metal chain), and scenarios (suspended, embedded in the wall, fixed on the floor). The experiment was performed in a commercial farm from July 30 to September 21, 2015. The animals were housed in collective cages, partially slatted floor, equipped with semi-automatic feeders and nipple drinkers. Every room with eight cages 113,02 ft² each, which makes a 2712,51 ft² experimental area. 696 pigs were used in Choice Genetics® breed, with an average age of 21 days, average weight of 12,34 pounds, divided between males and females. The pigs were divided into the treatment groups of 29 animals. The experimental design was a randomized block, with four different presentation scenarios of objects (control = without enriching object; T + C suspended = tire + suspended metal chain; T + C wall = tire and embedded metal chain on the wall; T + C floor = tire and fixed metal chain on the floor), repeated six times in a row. Camcorders were used for filming and subsequent evaluation of the behavior recorded every 10 minutes during 11 hours per day (7 a.m. to 6 p.m.), once in a week, 41 days. In the treatments with environmental enrichment, there were differences in the interaction with enriching objects (P <0.05). Regarding the presentation and the type of object, the animals preferred the suspended position and metal chain, respectively. The animal performance factors (daily feed intake, daily weight gain, feed conversion), and lesion rates, were not influenced by environmental enrichment.Item Influência do enriquecimento ambiental no comportamento e desempenho de leitões na fase de creche(Universidade Federal de Goiás, 2016-03-08) Oliveira, Marcus Vinicius Garcia de; Di Campos, Melissa Selaysim; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4717226U7; Mascarenhas, Alessandra Gimenes; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4795211T6; Nunes, Romão da Cunha; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4796163U1; Di Campos, Melissa Selaysim; Silva, Ana Carolina de Sousa; Hellmeister Filho, PauloThe animal welfare assessment techniques are used to check the stress level of the animals. Swine production has been reported as one of the most stressful livestock. The nursery phase is heavily critical, whereas the piglets are liable to several agent stressors leading them to welfare state decrease and causing stereotyped behaviors. One way to reduce the issues stress in the nursery phase is environmental enrichment technique. This technique consists in providing enriching objects that stimulate the exploratory behavior pigs, increasing the well-being and animal cognition improvement. However, the enriching object pigs adaptation with permanent presence in pen leads to decreased of interaction frequency with the enriching object. Environmental enrichment in time intermittently may increase the piglets interaction frequency with enriching object, promoting the novelty aspect and increasing well-being. Therefore, the aim of the study was to evaluate the effect of time intermittently of environmental enrichment on the novelty effect and interaction frequency of piglets with enriching object (wheelbarrow tire) and its influence on the nursery piglets behavior and performance. Were used 720 piglets in nursery phase of both sexes. The piglets were assigned into four treatments: WEO - without enriching object; PEO - permanently enriching object; WEO24 - No enriching object with 24h intermittent; WEO48 - No enriching object with 48h intermittency. Were evaluated the piglets behavior whereof ethogram, the Black Globe and Humidity Index(BGHI) effect in the behavior, injury score, diarrhea score and performance. There was recorded a significant effect (p <0.05) in the piglets interaction with enriching object for treatments with intermittent time and A significant effect (p <0.05) of environmental enrichment treatments in reduce stereotypes behavior (WEO: 7.62%; PEO%: 6:21%; WEO24: 6,31%e WEO48: 6.59%). The BGHI variation changed the piglets behavior. Significant effects were observed (p <0.05) for lesion score values, diarrhea and performance among the treatments. The higher interaction frequency with the enriching object was observed in piglets submitted to, whereas was observed that the intermittency time promoted the novelty aspect when was reintroduced into the environment. The decreased stereotyped behavior increasing the piglets welfare. However, the intermittency time did not influence the piglets performance.