01991naa a2200229 a 450000100080000000500110000800800410001910000170006024501070007726000090018452012980019365300370149165300260152865300180155465300250157265300290159770000180162670000230164470000160166770000200168377300580170311216382014-09-11       2014    bl uuuu     u00u1 u    #d1 aSILVA, B. C.  aButyrate and propionate improve the growth performance of Litopenaeus vannamei.h[electronic resource]  c2014  aOrganic salts may improvement the animal performance, increasing the efficiency of nutrient utilization and modifying the intestinal microbiota. This study aimed to evaluate the effects of sodium butyrate and sodium propionate supplementation at different levels of dietary inclusions in the growth of Litopenaeus vannamei. In total, seven diets were evaluated: a control diet (without supplementation) and three diets from each sodium salt, propionate and butyrate, in concentrations of 0.5%, 1% and 2%. We used 21 tanks of 6000 L stocked with 150 shrimps (2.53 ± 0.03 g). The shrimps fed diets supplemented with propionate and butyrate, in all concentrations, increased their final weight. The feed efficiency, nitrogen retention, protein efficiency rate, survival and yield of shrimps fed the diet containing 2% butyrate were higher in comparison with control treatment. The shrimps supplemented with butyrate also showed lower counts of Vibrio sp. in the intestine. The shrimps fed the diet supplemented with butyrate and propionate also showed higher values of serum agglutination titre. Thus, it is possible to conclude that dietary supplementation with propionate and butyrate in different dietary concentrations modify the intestinal microbiota and improves the growth of L. vannamei.  ahaemato-immunological parameters  aintestinal microbiota  aorganic salts  aPacific white shrimp  azootechnical performance1 aVIEIRA, F. N.1 aMOURIÑO, J. L. P.1 aBOLIVAR, N.1 aSEIFFERT, W. Q.  tAquaculture Research, New Jersey, EUA, p. 1-12, 2014.