The effects of organophosphorous pesticide diazinon on behavior and some hematological parameters of fry rainbow trout (Oncorhynchus mykiss)

Subject Areas : New Technologies in Aquaculture Development

rezvanolah kazemi ¹

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Received: 2023-01-07 Accepted : 2023-01-07 Published : 2022-11-22

Keywords: behavior, diazinon, Haematological profile, Keywords: Rainbow trout,

Abstract :

Abstract[1] This study was conducted to evaluate diazinon pesticide impact on some hematological indices in rainbow trout fry in Dr. Keyvan,s Research Center for Fisheries Sciences & Marine Technology (Islamic Azad University, Lahijan branch, Chamkhale port). During one week 120 pieces rainbow trout fry were exposed to three different consentration of Diazinon including 25, 50 and 75 percent of its LC50 (LC50=1.65 mg/lit) in 3 experimental groups and one blank group (by three times replicates) by O.E.C.D method. Exposed fry fishes showed some signs including neural paralysis, imbalance, abnormal swimming, severe impatience and paleness. The result showed that the number of leukocytes, erythrocytes, haematocrit and hemoglobin significantly decreased (P<0.05), but the amount of MCV and MCH increased significantly by 50% and decreased again, lymphocyte increased significantly by 50% and then increased by 75%. Resulted changes in erythrocyte & leukocytes after exposing with diazinon is due to malfunction in hemopoiesis and decrease in non-specific immune system.   *- Corresponding Authors; [e-mail]