sub-lethal effect of Nano zinc oxide (Nano-ZnO) on some hematological indices of Rainbow trout (Oncorhynchus mykiss)

Paper ID : 1037-ICIAQUA

Authors

Seyyed Aliakbar Hedayati *1, Mohsen Tajari2, Hamed Paknejad3 1Scientific Board 2Islamic Azad 3Gorgan

Abstract

Zinc is one of the heavy metals in aquatic ecosystems. Since nanotechnology is one of the newest technologies and now it has made significant role in various industries so in the present study, the toxicity of nano-zinc oxide on blood parameters of Rainbow trout (Oncorhynchus mykiss) was examined. The experiment were examined with 4 treatments and 3 repetition and two treatments were considered as control. At the end of the experiment blood samples were taken from fishes and various factors, including: The total number of white blood cells (leukocytes), lymphocytes, neutrophils, eosinophils, total number of red blood cells, (erythrocytes), hemoglobin content, hematocrit level, mean corpuscular volume (MCV), the corpuscular hemoglobin (MCH) and the corpuscular hemoglobin concentration was measured. The results showed that the decrease in red blood cells, hemoglobin and hematocrit, and white blood cells increased. All blood erythrocyteindicators showed changes. However, that does not make any change in leukocyte markers. These toxins cause anemia and affect the immune system of fish that may be due to its damaging effects on the hematopoietic organs such as liver and kidney. Therefore must be prevented from entering the wastewater to aquatic ecosystems to reduce heavy metals in fish and finally the food chain.

Keywords

Nano Zinc, toxicology, Trout, blood factors

Status: Abstract Accepted (Poster Presentation)