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Accumulation of heavy metals mercury and zinc in the gill tissue and their relationship with some blood biochemical parameters of Asian seabass (Lates calcarifer)
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Siamak Yousefi Siahkalroodi1   , Vahid Morshedi2 |
1- Department of Biology, Faculty of Biological Sciences, Varamin-Pishva Branch, Islamic Azad University
2- Department of Fisheries, Persian Gulf Research Institute, Persian Gulf University |
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Abstract: (595 Views) |
| This research was conducted with the aim of measuring and investigating the relationship between heavy metals (mercury and zinc) and some biochemical factors of blood and gill tissue of sea bass (Lates calcarifer) grown in cages in fall of 2022, located in Kangan port. After fixing the samples with alcohol, they were transferred to the laboratory. The biometric indexes of the fish including weight in grams were measured using a scale and total length in centimeters using a biometric board. Then, a sample of the gills of each piece of fish was prepared and the concentration of each metal was obtained by flame atomic absorption spectrophotometry. To evaluate histological analysis, gill tissue samples were separated and stained by hematoxylin and eosin method. Blood biochemical factors were measured according to the instructions of the commercial kit. The results of this research showed that the average metal mercury and zinc were 0.1 and 7.5 microgram/g respectively in the fish blood serum of the samples. which was lower than WHO and FAO standards. The average concentration of cortisol, glucose, albumin, total protein, cholesterol and triglycerides were 50.55 ng/l, 154.33 mg/ dl, 1.19 g/dl, 3.36 g/dl, 194 mg/dl and 244 mg/dl were obtained, respectively. In the examination of the gill tissue sample of Asian seabass, complications such as hyperemia, bleeding, hyperplasia, cell necrosis and destruction of the epithelium layer of the primary and secondary strands of the gill were observed. The concentration of heavy metals mercury and zinc in the gill tissue of the studied seabass was lower than the standard limit determined by FAO and WHO. |
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| Keywords: Asian seabass, Histopathology, Biochemical parameters, Mercury, Zinc |
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Full-Text [PDF 854 kb]
(263 Downloads)
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Type of Study: Research |
Subject:
آلودگي محيطهاي آبي
Received: 2024/06/8 | Accepted: 2024/07/7 | Published: 2024/08/10
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