http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4383 2026-04-11T08:06:42Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9778 Título: Utilização de feno ou silagem de maniçoba em substituição ao feno de Tifton 85 na alimentação de ovinos Autor: MACIEL, Michel do Vale Primeiro orientador: CARVALHO, Francisco Fernando Ramos de Abstract: The objective was to evaluate the subsitution of Tifton 85 hay (Cynodon sp.) For hay or silage (Manihot sp.) In diets without defined breed growing on weight gain, carcass yield and commercial cuts. We used 24 (twenty four) animals, with initial weight of 19.77 ± 1.95 kg and average age of six months, distributed in a randomized block design. The total duration of the experiment was 71 days, 15 days for diet adaptation and 56 for data collection. There was no difference in crude protein (P> 0.05) difference was found for the consumption of neutral detergent fiber between treatments (P <0.05) with lower consumption found for treatment with silage Maniçoba. Animals fed diets containing hay maniçoba had higher dry matter intake (P <0.05). Weight gain, feed conversion ratio was similar among treatments. The mean weight gain was 153.3, 156.9, and 135.3 g / day, respectively, for diets containing Tifton hay, hay and silage maniçoba. There was no significant difference (P> 0.05) for carcass weight and yield, loss of cooling (LC) and true yield (RV) between treatments. There was no difference in the yields of cuts (%) by the use of hay or silage to replace Maniçoba of Tifton. There was also no significant difference (P> 0.05) for the morphometric measurements of carcass. The hay and silage can replace Maniçoba Tifton hay in sheep feeding finishing without compromising weight gain, feed conversion, carcass yield and carcass characteristics. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação 2012-12-16T00:00:00Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9176 Título: Composição corporal e parâmetros de desenvolvimento de potros da raça quarto de milha Autor: SIQUEIRA, Rodrigo Primeiro orientador: MANSO, Helena Emília Cavalcanti da Costa Cordeiro Abstract: The objective of this work was to determine the morphometric parameters and body composition to monitoring the development of Quarter Horse foals, in the Brazilian Northeast, from birth to 24 months of life. In this study 51 foals were monitored monthly and the following body measurements were taken: withers height (WH), croup height (CH), cannon bone circumference (CBC), chest perimeter (CP), body weight, in addition to ultrasonographic evaluation of rump fat thickness (RFT). With the RFT data, Fat-Free Mass (FFM), Fat Percentage (FP) and Fat Mass (FM) were determined. The results demonstrated that the parameters analyzed changed significantly during the study period between age groups (P<0.05). At 24 months the foals reached 98% of the height at the withers, the cannon bone circumference 88%, the croup height reached 101%, the chest perimeter 94%, and finally 84.93% of the weight expected into adulthood. The average daily gain (ADG) in the 1st month was 1.428 kg/day, the foals practically doubled their weight in this phase, with 6 months the ADG was 0.686 kg/day, at 12 months 0.370 kg /day, 0.321 kg/day at 18 months and 0.201 kg/day at 24 months. In conclusion, developing foals show high weight gain and their morphometric measurements increase in a constant and linear way, demonstrating the importance of monitoring their development from birth in order to avoid yield losses in their adulthood. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação 2023-02-24T00:00:00Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9169 Título: Estudo preliminar para predição de consumo de nutrientes e desempenho de ovinos deslanados em confinamento baseado em aprendizagem de máquina Autor: COSTA, Hadja Lorena Rangel Uchôa Cavalcanti de Menezes Primeiro orientador: VÉRAS, Antonia Sherlânea Chaves Abstract: Once the main reason for confinement of livestock animals is to produce quality meat to supply the domestic market with regular supply and at the lowest production cost, the use of an Artificial Neural Network (ANN) system that allows the prediction of animal performance based on initial inputs and historical data seems promising, enabling low-performing animals to be identified in advance and discarded to maximize production. Given the importance of this information, as well as nutrient consumption by animals, the present study aims to investigate the use of ANN as predictors of nutrient intake and, from the chemical composition of the diet, predict the performance of shorn sheep in confinement. The database was obtained from information from scientific experiments conducted in the sheep sector of the Department of Animal Science at the Federal Rural University of Pernambuco. To test the efficacy of ANN in predicting desired characteristics, nine other prediction techniques with distinct features were explored to evaluate different scenarios and observe the best technique for each situation. Dealing with all predicted points, such as average daily intake, average daily gain, and final body weight, the ANN demonstrated a performance well below expectations when compared to other techniques included in the analysis. This may be a consequence of the low volume of data available for training, verification, and checking of the prediction models. Further studies are needed to explore other promising prediction tools for animal science as a whole. In summary, although ANNs may be a promising technique in the field of animal science, it is important to carefully evaluate the selection of variables and appropriate techniques for each specific case to obtain more accurate and reliable results. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação 2023-02-28T00:00:00Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9154 Título: Cabras leiteiras alimentadas com diferentes dietas basais e uma fonte lipídica : perfil de ácidos graxos do leite Autor: VASCONCELOS, Elizabeth Queiroz Lopes de Primeiro orientador: FERREIRA, Marcelo de Andrade Abstract: This study aimed to evaluate the fatty acids profile of milk of Saanen dairy goats fed with different basal diets and one lipid source. Twelve goats weighing 48.9±7.3 kg, with a mean milk yield of 2.8 kg per day at 84 days on average, were distributed into three Latin square designs (4 × 4) according to their productivities. The experimental periods lasted 21 days each, and 14 days comprised the adaptation time, while the others were used to collect samples and data. The experimental diets were composed of maize silage (MS), sorghum silage (SS), pangola grass hay (PH), or sugarcane bagasse (SB) associated with forage cactus, plus a concentrate containing extra-fat whole corn germ added as a lipid source. Individual proportions and the primary fatty acid groups (FA) from dairy goats’ milk were assessed. Data were analyzed with the statistical package from SAS®, and the differences were stated as statistically significant when P<0.05. The proportions of short and intermediate-chain FA were higher in the milk from goats fed with MS and SS, while the proportion of long-chain FA was greater in the milk from goats that received PH or SB. Conversely, the saturated FA concentration in milk was higher when goats received silages, whereas the polyunsaturated FA content was higher in the milk of goats fed with SB or PH. PH or SB-based diets provided more exhaust of bio-hydrogenation intermediates, mainly the C18:1 trans-11, which made the CLA cis-9 trans-11 proportion superior to the other treatments. The sum of omega-3 FA (n-3) in milk was higher for the basal diet containing forage cactus and SS, and consequently, the n-6/n-3 ratio was lower for this treatment. Based on the results obtained, it is concluded that PH or SB-based diets are more indicated to improve the FA profile of milk of Saanen dairy goats, owing to reduce the concentrations of saturated FA and increase those polyunsaturated FA beneficial to human health (C18:1 trans-11 and CLA cis-9 trans-11). Despite that, the SS-based diet led to the lowest milk n-6/n-3 ratio, providing the best quality for human nutrition and health. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação 2023-02-27T00:00:00Z