02212naa a2200289 a 450000100080000000500110000800800410001910000200006024501260008026000090020650001720021552011900038765000180157765000110159565000280160665000140163465000160164865000130166465000160167765300290169365300260172270000220174870000200177070000260179070000150181677300910183120024012017-06-02       2014    bl uuuu     u00u1 u    #d1 aHONORATO, C. A.  aGastrointestinal transit of extruded or pelletized diets in pacu fed distinct inclusion levels of lipid and carbohydrate.  c2014  aTítulo em português: Trânsito gastrintestinal de dietas extrusadas ou peletizadas em pacu alimentado com níveis distintos de inclusão de lipídios e carboidratos.  aThe objective of this work was to evaluate the effect of pelletized or extruded diets, with different levels of carbohydrate and lipid, on the gastrointestinal transit time (GITT) and its modulation in pacu (Piaractus mesopotamicus). One hundred and eighty pacu juveniles were fed with eight isonitrogenous diets containing two carbohydrate levels (40 and 50%) and two lipid levels (4 and 8%). Four diets were pelletized and four were extruded. Carbohydrate and lipid experimental levels caused no changes to the bolus transit time. However, the bolus permanence time was related to diet processing. Fish fed pelletized diets exhibited the highest gastrointestinal transit time. Regression analysis of bolus behavior for pelletized and extruded diets with 4% lipid depicted different fits. GITT regression analysis of fish fed 8% lipid was fitted to a cubic equation and displayed adjustments of food permanence, with enhanced utilization of the diets, either with extruded or pelletized diets. GITT of fish fed extruded diets with 4% lipid was adjusted to a linear equation. The GITT of pacu depends on the diet processing and is affected by dietary levels of lipid and  carbohydrate.  aCarbohydrates  aLipids  aPiaractus mesopotamicus  aViscosity  aCarboidrato  aLipídio  aViscosidade  aGelatinização do amido  aStarch gelatinization1 aALMEIDA, L. C. de1 aNUNES, C. da S.1 aCARRILHO, E. N. V. M.1 aMORAES, G.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 49, n. 11, p. 829-835, nov. 2014.