Caracterização bioquímica da carne de cabritos criados na região do Alto Camaquã.

• Autor(a) principal: Kessler, Julcemar Dias
• Data de Publicação: 2012
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFPel - Guaiaca
• Texto Completo: http://repositorio.ufpel.edu.br/handle/ri/2598
• topic: Ácido linoléico conjugado; Colesterol; Lipídios; Proteína; Cholesterol; Conjugated linoleic acid; Lipids; Protein; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA

The study aimed to evaluate the effect of age at slaughter on chemical composition, cholesterol and fatty acid profile of meat goats from region Alto Camaquã . A total of 30 goats, 15 were aged 8-9 months and 15 with 11-12 months of age. Of each goat were evaluated Longissimus dorsi (LD), Triceps brachii (TB), Infraspinatus (IS) and Biceps femoris (BF) to determine the proximate composition (moisture, protein, ash and lipids), cholesterol and fatty acids profile acids. The experimental design was completely randomized with a factorial 2 x 3 (ages two and three regions). There was significant interaction between age and the region of slaughter (muscle) studied. Goats slaughtered younger have higher concentrations of moisture and mineral matter on the back, shoulder and leg (P <0.05) compared to older animals. Since fat content were higher in goats slaughtered older (P <0.05). For cholesterol, only the leg of goats slaughtered younger levels were lower than other regions (P <0.05). There was no difference in the total cholesterol to goats slaughtered older (P> 0.05) in different regions of the carcass. Goats slaughtered older (11-12 months) had higher levels of C12:0, C14:0, C15:0, C16:0 and C18:0 (P <0.05) in muscle (LD). As for the muscles (TB) and (IS) there was no difference in C15:0 and C16:0. The same was observed for the muscle (BF) (P> 0.05). For the fatty acid C18:1 trans-9 and C18:1 trans-11, the goats slaughtered older had higher concentrations (P <0.05) in LD and BF muscles. While the muscles TB and IS only statistical difference (P <0.05) for C18: 1 trans-9, higher in older animals slaughtered. Regarding the content of polyunsaturated acids C18:2, C18:3, C20:3, C20:4, C20:5, C22:5 and C22:6 were higher in young kids (P <0.05) in the muscle LD. While TB and IS the C20:4 and C20:5 were higher in older kids. BF in the C18: 2 cis9, trans-11 (CLA) was higher in older kids (P <0.05), other muscles in this fatty acid did not differ (P> 0.05). With the progress of the slaughter of goats rises the amount of protein and fat, but cholesterol does not change. The regions of the substrate showed different chemical composition. There is direct relationship between age at slaughter increased with fat saturation and concentration of conjugated linoleic acid. The goat meat is a source of fat omega 3 and 6, showing a relationship beneficial to health.