Objetivou-se avaliar o consumo, a digestibilidade dos nutrientes e o comportamento ingestivo de tourinhos Nelore confinados, alimentados com diferentes teores de torta de cupuaçu na dieta. Foram utilizados cinco animais com peso vivo (PV) médio de 186,8± 19,5 kg e aproximadamente 13 meses de idade. Os animais foram distribuídos em cinco tratamentos contendo diferentes teores de torta de cupuaçu (TC): 0%; 5%; 10%; 15% e 20%, em substituição ao milho e farelo de soja. O delineamento experimental utilizado foi o quadrado latino 5 × 5, composto de cinco animais e cinco períodos experimentais. Cada período experimental teve duração de 15 dias: 10 dias de adaptação à dieta e cinco dias para a avaliação da digestibilidade dos nutrientes. A mensuração do comportamento ingestivo (observação visual) foi realizada no final de cada período experimental (15º dia), durante 24 h. O consumo de matéria seca (CMS), extrato etéreo (CEE) e de proteína bruta (CPB), expresso em kg/dia e %PV, apresentaram efeito quadrático (P<0,10) em relação à inclusão dos diferentes teores de torta de cupuaçu, onde observou-se que o maior consumo destas frações ocorreu no tratamento com 5,0% TC. Nos coeficientes de digestibilidade da matéria seca (DMS); proteína bruta (DPB); extrato etéreo (DEE); fibra em detergente neutro (DFDN); fibra em detergente ácido (DFDA); carboidratos não fibrosos (DCNF), e os parâmetros de comportamento ingestivo, não foram observados diferenças (P>0,10) entre os teores de inclusão. A inclusão de até 5% de torta de cupuaçu, em substituição ao farelo de soja e milho, é recomendado em dietas para tourinhos Nelore em confinamento, pois não interfere no consumo e digestibilidade de nutrientes e comportamento ingestivo dos animais.
The objective of this work was to evaluate the effect of inclusion of dried distillery grains (DDGS) as a replacement for soybean meal in the diet of lambs in feedlot and to evaluate the performance, yield characteristics, and meat quality. Three diets with different DDGS levels were provided: diet with soybean meal (control); diet with 50% replacement of soybean meal by DDGS; diet with 100% replacement of soybean meal with DDGS. The average feed intake of the animals and the difference between the leftovers showed no difference among the treatments. No differences of average daily weight gain, body score and feed conversion index were observed among treatments. The same was observed for biometric measurements. However, warm carcass weight and chest perimeter were higher without the use of DDGS. The final weight, muscle, bone, intermuscular, subcutaneous and total fat weight did not differ among treatments. No difference was also found for tissues color. The kilogram of the concentrate mixture that uses soybean meal as the main source of protein (control) was approximately 12% more expensive than the mixture using DDGS (100%). The use of DDGS as an alternative source in confined lamb feeding may be recommended in up to 24% replacement in dietary dry matter.
Residues that could be discarded and transformed in high biological value protein is a measure of environmental preservation combined with the sustainability of animal production. This study evaluated the effects of the addition of passion fruit seed oil (PFSO) on broiler diet under the resistance of skin, physical-chemical characteristic, fatty acid profile and lipid oxidation (under storage) of breast meat obtained from these animals. There was improvement in the condition of skin rupture and meat tenderness; apart from that, oxidative reactions decreased, as PFSO was added to the diet (P<0.05). On the other hand, no effect on colour, pH, water retention capacity and weight loss on cooking (P>0.05) was observed. There was a linear effect increasing only for the margaric (C17:0) and cis10-Heptadecanoic (C17:1; P<0,05) fatty acids. However, due to the low amount of these fatty acids in PFSO, the found content was still low in all evaluated treatments. However, the evaluated levels did not contribute to the increase of the polyunsaturated fatty acid profile (P>0.05). Thus, it can be concluded that PFSO improves the resistance of broiler skin, which becomes softer and less susceptible to oxidative effects due to the oil’s antioxidant action, suggesting that it may be an ingredient that brings substantial benefits in the poultry industry.
The present study was conducted to evaluate the effect of breed group, slaughter weight, and sex on the muscle fiber area, collagen percentage, and fatty acid profile of goat kid meat. A total of 74 animals (Alpine; ½ Boer + ½ Alpine; ½ Nubian + ½ Alpine; ¾ Boer + ¼ Alpine; and three-cross [¼ Boer + ¼ Alpine + ¼ Nubian]) were used. One animal was selected per slaughter weight, sex, and breed group to evaluate the fatty acid profile. One-third of the animals was slaughtered upon reaching 25, 30, and 35 kg. The experimental design was completely randomized and Tukey’s test was used to compare the means. There was no difference for muscle fiber area or collagen percentage between the tested parameters, indicating similar texture of the meat from the evaluated animals. Sex influenced the C14:0, C16:0, C16:1, C20:3n3, C20:5n3, and omega-3 fatty acids, whereas breed group influenced the levels of C18:2n6c, C20:0, C24:1, and CLA cis. Slaughter weight did not affect the fatty acid profile, but the sex × slaughter weight interaction influenced the levels of C18:0, unsaturated fatty acids, and the polyunsaturated/saturated fatty acid ratio. Male and heavier animals produce the best meat in terms of nutrition. Key Words: breed, Capra hircus, fat, muscle, quality, tenderness
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