Research Note: Gill Histopathological Lesions of Common Carp in Exposed to Chlorpyrifos and Salinity

Document Type : Original Research

Authors
Mona Hasankhany 1
Tina Hasankhani 2
Seyed Ali Akbar Hedayati 1
Mohammad Mazandarani 1
1 Faculty of Fisheries and Environmental Sciences, Gorgan University of Natural Resources and Agricultural Sciences, Gorgan, Islamic Republic of Iran.
2 Department of Immunology and Microbiology, Mycology Research Center, Faculty of Veterinary Medicine, University of Tehran, Tehran, Islamic Republic of Iran.
Abstract
The effect of poison to salinity were studied on gill tissue of common carp (C. carpio). Based on this, 250 common carp fry with an average weight of 21±2 g were distributed in four treatments, each with three repetitions, including salinities of zero, 4, 8, and 12 ppt. After 7 days, one group was placed for 4 d in exposure to pesticide with an acute concentration of 150 ppm chlorpyrifos with the formulation of 40.8% EC, and the second group was placed for 7 d in the sub-acute concentration of 15 ppm chlorpyrifos. Histopathology of Gill tissue showed that the poison and salinity had such injuries as epithelial hypertrophy, lamellar aneurism, secondary connecting adjacent blades, distal hyperplasia, epithelial lifting, leukocyte infelt, and hyperplasia. Gill histopathological result showed some lesions at high concentrations as epithelial hypertrophy, distal hyperplasia and lamellar fusion, however at low concentrations lamellar aneurism, epithelial lifting and leukocyte infelt were recorded. Therefore, these pathological indicators can be used as biomarkers.

Keywords

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Journal of Agricultural Science and Technology
Volume 28, Issue 2
March and April 2026
Pages 299-306