| (a) Normal gill tissue of shrimp. Pri primary filaments, HL hemolymphaticlacuna, Sec secondary branching gill filaments, P pillar cell system, Epiepithelium, C cutical. (b) B. subtilis fed additive in Experiment I shrimp,the gross structure are mild focal fusion of the secondary lamellae (c)AgNPs fed additives in Exp II shrimp different multiple gross structureappearance of the gill filaments (d) AgNO3 as a feed additives in ExpIII group shrimp, gill filaments are heavily fused (e) Vibriosis as a feedadditive in Exp IV, the shrimp gill are completely damaged. |
