Acta Scientiarum: Animal Sciences (Jul 2007)
Morfologia de órgãos digestivos e não digestivos de suínos de linhagens modernas durante as fases de crescimento, terminação e pós-terminação = Morphology of digestive and non-digestive organs of pigs from modern lineages during growth, finishing and post-finishing phases
Abstract
O melhoramento genético de suínos levou ao surgimento de diversas linhagens suínas que apresentam elevada capacidade de desenvolvimento de massa muscular. Entretanto, pouco se sabe cientificamente sobre a morfologia de órgãos destes animais, conhecimento que ajuda a elucidar características relacionadas ao desempenho zootécnico como ganho de peso e conversão alimentar em carne magra. Objetivou-se, assim, comparar a morfologia dos órgãos digestivos e não-digestivos de suínos de linhagens modernas ao final das fases de Crescimentos Ie II, Terminação e Pós-terminação. O peso dos órgãos em relação ao peso vivo diminuiu significativamente (p The genetic market makes use of various modern swine genotypes that present high capacity for muscular mass development. These genetic lines have been used in swine production without existing scientificinformation about morphology, knowledge that can elucidate factors related to growth performance, such as weight gain and food conversion in lean meat yield. The aim of this experiment was to compare the morphology of digestive and non-digestive organs of moderngenotypes. At the end of the phases: Growing I, Growing II, Finishing and Post-finishing, the pigs were slaughtered and the organs were weighed. The weight of the organs decreased (p < 0.01) with body development, in agreement with the biological growth of the animals. The morphology of the digestive organs were different (p < 0.06) among lineages, which showed that differences can exist, mainly regarding digestive capacity and, possibly, food intake and efficiency. The length of the small intestine was different (p < 0.06) among lines, which can be an indicative of increased body development due to an extended food exposition area to intestinalcells. The scientific knowledge of swine lines morphology is important because this information can contribute to animal growth performance.
