Investigation effect of Zinc on some hematological and immunological indices of the farmed Silver Carp (Hypophthalmichthys molitrix)

Subject Areas : Water Pollution

M. Shakoori ¹ , S. Abdali ² , H. Negarestan ³ , A. Hallajian ⁴

1 - Faculty of Marine Science and Technology, Islamic Azad University, Tehran North Branch
2 - Faculty of Marine Science and Technology, Islamic Azad University, Tehran North Branch
3 - Iranian Fisheries Research Organization (IFRO), Tehran
4 - International Sturgeon Research Institute, Rasht

Received: 2012-04-09 Accepted : 2012-11-20 Published : 2012-12-20

Keywords: Zinc, Hematological indices, Silver carp (Hypophthalmichthys molitrix),

Abstract :

This study aims to elucidate the toxic impact of zinc on hematological indices of the farmed Silver Carp (Hypophthalmichthys molitrix). In this study, after adaptation 135 fish specimens with the length of 13±1 cm and the weight of 50±10 gr were put in one control treatment and 2 experimental treatments contained of 5 and 10 mg/L (Zn (no) 3)2 in 90 liter aquariums. Blood samples were taken from the caudal vein after 12, 24, 48, 72 and 96 hours. Results showed that, hematocrite (Hct), hemoglobin levels (Hb), mean corpuscular volume (MCV) and mean corpuscular hemoglobin (MCH) increased significantly (p<0/05). The number of White Blood Cell (WBC) on 5 mg/L and 10 mg/lit treatments until 72 hours decreased significantly but after 96 hours it increased significantly (P<0/05). The number of Red Blood Cells (RBC) decreased significantly until 96 hours (P<0/05). According to the results, blood parameters were sensitive factors in monitoring the toxicity and the stress caused by zinc particularly in acute concentrations.