Change in leukocyte by acute toxicological stress of diesel oil in juveniles of Nile tilapia

This study aimed to evaluate the stress and changes in white blood cell count of juveniles Oreochromis niloticus subjected to acute toxicity of diesel oil. The toxicity was evaluated in a completely randomized design with five dilutions (20, 25, 30, 35 and 40%) and one control, both with three replicates. For the assessment of blood glucose levels and changes in white blood cell count, blood was drawn by caudal puncture of the dying fish. It was concluded that diesel oil can present risks to aquatic ecosystem, causing toxicity and physiological changes to fish.