TCC - Zootecnia (Sede)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/478
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Item Desempenho e características de carcaça de cordeiros alimentados com palma forrageira ensilada ou in natura sob restrição ou não de água(2025-03-11) Amaral, Thiago Garcia do; Monnerat, João Paulo Ismério dos Santos; http://lattes.cnpq.br/3851426263880079; http://lattes.cnpq.br/8390297229951855A pecuária no semiárido brasileiro enfrenta desafios devido à escassez hídrica e à baixa disponibilidade de volumosos de qualidade, sendo a palma forrageira uma alternativa para a alimentação e hidratação dos ovinos. No entanto, sua forma de fornecimento pode impactar o desempenho dos animais. Este estudo avaliou os efeitos da palma forrageira in natura e ensilada, associadas ou não à restrição hídrica, sobre o desempenho produtivo e as características de carcaça de cordeiros da raça Santa Inês. Foram utilizados 40 cordeiros machos, não castrados, com idade entre 90 e 120 dias e peso inicial médio de 23,07 ± 2,45 kg, distribuídos em delineamento em blocos casualizados (DBC), num esquema fatorial 2x2, com dois tipos de volumoso (palma in natura + feno ou silagem de palma e feno) e duas formas de oferta hídrica (livre ou restrita). O período experimental foi de 75 dias, incluindo 19 dias de adaptação e 56 dias de coleta de dados. Os tratamentos foram dieta a base de silagem de palma e feno com ou sem restrição de água e outro a base de palma in natura + feno com ou sem restrição de água, ambos na proporção volumoso: concentrado de 65:35. sendo ofertada duas vezes ao dia, às 8h e às 16h. O consumo alimentar foi monitorado diariamente. Ao final do período experimental, os cordeiros foram submetidos a jejum sólido de 16 horas e abatidos. Após o abate, as carcaças foram pesadas feitas avaliações de medidas morfométricas, rendimento de carcaça, deposição de gordura perirrenal e espessura de gordura subcutânea. Os animais que receberam silagem de palma e feno apresentaram maior (P<0,05) desempenho, rendimento dos cortes lombo e serrote e melhor conformação e acabamento, em comparação aos que consumiram palma in natura + feno, entretanto não foi observado efeito (P>0,05) nos rendimentos de carcaça, pH, temperatura, EGS e avaliações morfometricas da carcaça. Por outro lado, a restrição de água não afetou (P>0,05) as características e rendimento de carcaça, engorduramento e as avaliações morfometricas, porém interferiu (P<0,05) negativamente no desempenho, conformação, acabamento e cortes cárneos lombo e serrote dos cordeiros em crescimento, evidenciando a importância do acesso irrestrito à água para o desenvolvimento adequado dos cordeiros. Conclui-se que a utilização da palma forrageira ensilada se mostra como alternativa mais eficiente em comparação à palma in natura, proporcionando maior desempenho produtivo dos animais. A restrição hídrica impacta negativamente o desempenho e as características de carcaça dos cordeiros, independentemente do tipo de volumoso ofertado.Item Características de carcaça de matrizes ovinas de descarte(2024-10-01) Silva Neto, Adeildo Gomes da; Monnerat, João Paulo Ismério dos Santos; http://lattes.cnpq.br/3851426263880079; http://lattes.cnpq.br/3166354588303333The national sheep herd reached a total of 21,792,139 heads in 2023, with the state of Pernambuco accounting for 3,674,659 heads, a significant number of animals, many of which are annually culled. In sheep farming systems, ewes are essential tools for animal production, but they occasionally need to be culled, either due to age or health reasons that compromise their productive performance. When culled, these ewes' carcasses need to be utilized in some way, often being sold for consumption. However, meat from older or culled animals is undervalued due to its sensory characteristics and is often considered of low quality and low acceptability by consumers. Despite the low consumption of this species' protein, there is potential for a sheep meat market in Brazil. Research evaluating sheep meat quality typically focuses on studies investigating differences in sex, slaughter age, breed, diet, and production systems, with the vast majority being conducted on lambs. Meanwhile, studies on adult sheep, especially cull ewes, are almost nonexistent in the scientific literature. This study was conducted using 12 cull ewes of the Santa Inês breed, from the sheep herd of the Animal Science Department at UFRPE, with an average age of 33 months and an average weight of 56 ± 6.99 kg. The objective was to characterize the qualitative and quantitative aspects of cull ewe carcasses intended for meat production. It was observed that more research is needed to evaluate cull ewe carcasses in order to define carcass grading guidelines for this category, focusing on differentiating conformation and quality standards.Item Aspectos produtivos relacionados a lesões em carcaças de bovinos e suas perdas econômicas em frigorífico comercial(2024-02-28) Costa, Maria Emília Felix de Aguiar; Monnerat, João Paulo Ismério dos Santos; http://lattes.cnpq.br/3851426263880079; http://lattes.cnpq.br/9002794966802747The bruises in animal carcasses are a reality present in the country's refrigerators, causing damage to both the producer and the industry. One of the ways to evolve in increasing productivity is to perform a mapping of the hematomas present in bovine carcasses and quantify the possible economic losses. The objective of this study was to estimate the occurrence of lesions in bovine carcasses in a commercial refrigerator and the economic consequences arising from this scenario. The work will be carried out in a refrigerator, located in Recife-PE. The study comprised 10 random days of data collection, where the boning of 2500 cattle quarters was followed, 800 females and 1700 males, and it was possible to monitor the boning of 2100 rear quarters and 400 front quarters. To record the occurrences, a form developed especially for this purpose was carried out. The results found showed that of the 2500 cattle rooms evaluated, 20.04% had some type of injury, with 398 of the lesions found in males (79.44%) and 103 females (20.56%). Evaluating the economic losses, during the experimental period, it can be observed that the total losses from injuries in kilograms was 88.17 Kg in 2500 rear, and only 501 (20.04%) presented injuries, so the losses during the 10 days was 0.176 Kg/quarter. It can be concluded that the situations to which animals are exposed until the moment of slaughter have an intense impact on the productive and behavioral parameters.Item Validação de equações de predição da composição química da carcaça de ovinos Santa Inês(2021-12-03) Soares, Raquel Cristina Carvalho; Véras, Antonia Sherlânea Chaves; http://lattes.cnpq.br/0074248045711399; http://lattes.cnpq.br/1279928414920644With the growth of sheep farming in Brazil, further studies in the field of nutrition are needed in search of better carcasses with a view to greater meat production and better quality meat. From this premise, equations were proposed to estimate carcass chemical composition in ruminants. However, one of the most widely used methods is the section between the 9th and 11th ribs, which was initially tested on taurine, and has also been evaluated for predicting the chemical composition of the sheep carcass. In one study, equations were proposed to predict the chemical composition of the carcass of sheep using data from different experiments conducted, using among other independent variables the section of the 9th and 11th ribs. However, these equations need to be validated. Therefore, the objective was to evaluate the prediction equations of: water; protein (PB); ether extract (EE) and energy (EN) in the carcass of Santa Inês sheep. The carcass water, EE and EN contents were satisfactorily estimated, proving to be accurate and accurate models. However, to estimate the CP contents, the model was accurate, but not very precise, needing adjustments to better estimate the carcass protein of Santa Inês non-castrated male sheep.Item Correlações entre parâmetros obtidos por meio de ultrassonografia e na carcaça de novilhos bubalinos terminados em confinamento(2021-12-03) Vieira, Guilherme Heliodoro Pedroso; Pessoa, Ricardo Alexandre Silva; http://lattes.cnpq.br/0245806512931662; http://lattes.cnpq.br/8840572890087004In order to evaluate the correlations between measurements determined in vivo by ultrasound and in the carcass of feedlot-finished buffalo steers, the experiment was carried out in the Buffalo Culture Sector of the Animal Science Department of the Federal Rural University of Pernambuco. Twenty whole buffalo Murrah steers were used, with an initial average weight of 300 kg, collective in individual pens. Feeding was confirmed by sugarcane corrected with urea and small palm (Nopalea cochenillifera) with urea, replacing wheat bran, and ad libitum approval, at 06:00 and 18:00, allowing about 10% of the leftovers. After the 80 days, experimental measures were carried out with measurements of the ribeye area (AOLU) and subcutaneous fat thickness (EGSU) by ultrasound. Afterwards, the animals were introduced to fasting for 16 hours and slaughtered to obtain the carcass. In the cold carcass, between the 12th and 13th ribs, AOLC and EGSC were measured. The experimental design adopted was in randomized blocks with four treatments. Pearson's correlation was performed between measurements determined in vivo by ultrasound and in the carcass of Murrah steers, accepting up to a level of 5% precision. Ultrasound-measured AOLU was highly correlated with carcass-measured AOLC (0.96) and carcass compactness index (0.87) selected on carcass (P<0.001). Ultrasound-measured EGSU showed high correlation (P < 0.001) with carcass EGSC (0.94) and low but slight correlation (P < 0.05) with ICC (0.48) and AOLC (0.48) chose on the carcass. AOLU and EGSU measurements adjusted by ultrasonography can be used in the evaluation of these parameters in the carcass.Item Predição da composição física e química da carcaça por meio da perna em ovinos Santa Inês(2020-10-30) Souza, Elder Bruno de; Véras, Antonia Sherlânea Chaves; http://lattes.cnpq.br/0074248045711399; http://lattes.cnpq.br/1503874613747770The objective of the present work was to evaluate whether the physical and chemical compositions of the leg cut can predict the physical and chemical compositions of the Santa Inês sheep carcass and generate simple linear equations for the prediction of these components in the carcass. 42 male Santa Inês lambs were used, un-castrated, with BW 19.48 kg ± 1.86 kg, and aged between 6 and 7 months, housed in individual pens provided with feeders and drinkers, and fed with a roughage:concentrate ratio of 50:50 in diet. After 14 days of adaptation of the animals to management and diet, four animals were slaughtered, and the others after 63 experimental days. Before slaughtering, all animals were weighed after fasting solids for 16 hours to obtain body weight at slaughter (SBW). After slaughter and obtaining the carcass, it was cooled to 4 ° C for 24 hours, for later obtaining the cold carcass weight (CCW). In a refrigerated environment, the carcasses were divided in the dorsal midline to obtain two half carcasses, sectioning the left half carcass in the meat cuts neck, palette, rib, saw, loin and leg that were weighed, placed in plastic bags, vacuum packed and frozen for further dissection, removed from the freezer and thawed in a refrigerator at 4 ° C. The dissection aimed to separate and quantify (g) the physical components of muscle, fat, bones and other tissues. The physical composition of the half carcass was obtained by adding the physical components of the leg and the rest of the carcass. The correlations between the physical and chemical components of the reconstituted carcass and the respective physical and chemical compositions of the leg were evaluated. The criteria adopted for the classification of the correlation coefficients (r) were strong (r> 70%), moderate (30% < r < 70) and weak <30%. The correlated data (P <0.05) were used to propose parameters of simple linear equations to predict the physical and chemical components of Santa Inês sheep carcass from these constituents in the leg section. There was a moderate to strong correlation between the tissue and chemical components of the cut leg and their respective components in the carcass. Simple linear equations were proposed to predict these components in the carcass. The physical and chemical composition of Santa Inês sheep carcass can be predicted by means of the physical and chemical composition of the leg.