01810naa a2200253 a 450000100080000000500110000800800410001910000210006024501740008126000090025552010020026465000160126665000260128265000130130865000270132165000290134870000200137770000200139770000170141770000160143470000190145070000180146977300690148711359512025-10-14       2025    bl uuuu     u00u1 u    #d1 aCANDIA, E. W. S.  aEffects of different salinity levels on Nile tilapia nursery in a biofloc systembgrowth performance, water quality, and hematological parameters.h[electronic resource]  c2025  aThis study evaluated the effects of different salinity levels on the nursery phase of Oreochromis niloticus in a biofloc system, focusing on water quality, zootechnical performance, and hematological parameters. The 42-day experiment was conducted using 18 tanks (100L each) stocked with 40 tilapia fingerlings (1.14 kg m⁻3) of approximately 2.86 g. Fish were exposed to salinities of 1, 5, 10, 15, 20, and 25 ppt, with three replicates per treatment in a randomized design. Water quality remained within acceptable limits throughout the trial due to the biofloc technology, although increased ammonia concentrations were observed at 10 ppt and elevated nitrite levels at 25 ppt. Regarding zootechnical performance, final weight (g) and uniformity (%) were statistically higher in the 1 ppt treatment and lower in the 25 ppt treatment. Survival and growth were negatively affected at 25 ppt, where the highest incidence of body lesions was also recorded. Hematological analyses revealed that  aAquaculture  aOreochromis niloticus  aSalinity  aSuper intensive system  aZootechnical performance1 aSEIFFERT, W. Q.1 aSERAFINI, R. L.1 aSILVA, B. C.1 aSIMIONI, C.1 aPEREIRA, S. A.1 aVIEIRA, F. B.  tAquaculture International, Londongv. 33, n. 453, p. 1-20, 2025.