02146naa a2200241 a 450000100080000000500110000800800410001910000170006024501520007726000090022952013950023865300170163365300250165065300140167565300180168965300270170770000160173470000200175070000180177070000230178870000200181177300730183111250652016-05-11       2016    bl uuuu     u00u1 u    #d1 aSILVA, B. C.  aDietary Supplementation with Butyrate and Polyhydroxybutyrate on the Performance of Pacific White Shrimp in Biofloc Systems.h[electronic resource]  c2016  aThis study aimed to evaluate the effects of dietary supplementation with sodium butyrate or polyhydroxybutyrate (PHB) on growth performance, as well as changes in intestinal microbiota and hemato-immunological parameters, of Litopenaeus vannamei reared under a superintensive biofloc system. Twelve 800-L tanks were each stocked with 250 shrimp/m3 (3.96 ± 0.04 g mean initial weight) and reared over a 6-wk period. The basal diet and two test diets supplemented with 2% of each feed additive. At the conclusion of the growth trial shrimp fed with the butyrate-supplemented diet, as compared with the control shrimp, showed higher survival and productivity and lower total bacterial and Thiosulfate-citrate-bile salts-sucrose Agar (TCBS) counts in the intestine. However, no differences were observed in other performance parameters analyzed. Shrimp fed with both supplementation regimens also showed an increase in total and granular hemocytes, as well as an increase in serum agglutination titer. Shrimp offered diets supplemented with sodium butyrate had higher counts of hyaline cells. Thus, for L. vannamei reared in a superintensive biofloc system, it can be concluded that dietary supplementation of sodium butyrate, more so than PHB, acted as an immune system modulator by reducing the concentration of pathogenic bacteria in shrimp gut, thereby increasing survival and productivity  abutyric acid  aLitopenaeus vannamei  anutrition  aorganic salts  asuper-intensive system1 aJATOBÁ, A.1 aSCHLEDER, D. D.1 aVIEIRA, F. N.1 aMOURIÑO, J. L. P.1 aSEIFFERT, W. Q.  tJournal of World Aquaculture Society, Nova York, USA, p. 1-11, 2016.