نوع مقاله : مقاله کامل علمی - پژوهشی
نویسندگان
1 دانشجوی دکتری، بوم شناسی آبزیان شیلاتی، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران
2 دانشیار، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
With the increase in plastic production and its use in the world, the number of plastic particles in water environments is also increasing. On the other hand, with the increase in global fish consumption, there is a possibility of increasing public health risks for humans as the final consumer of the food chain. Many studies have investigated the presence of microplastics in important and commercial fish. This research examines the Caspian white fish (Rutilus frisii kutum), one of the most important and widely consumed commercial fish in the Caspian Sea, at Khazarabad and Galugah stations. For this purpose, 30 Caspian white fishes were randomly collected from local fishermen in each station. The total length and total weight of each fish were measured and recorded. The fish were transferred to the laboratory under safe conditions. Then they were cut into small pieces and placed in glass bottles under the influence of 10% potassium hydroxide solution at 60 degrees Celsius for 48 hours until their biological materials were completely digested. Then the mixture is stirred in the bottle for 2 hours and then the suspended materials are allowed to settle. In this step, 20 ml of the supernatant solution is filtered by Whatman filter paper. Then the paper filters were placed at 60°C for 24 hours to dry completely. Finally, the dried paper filters were examined by microscope. The obtained data were evaluated by SPSS22 software. According to the observations, four color groups (white, black, red, blue, and yellow), three shape groups (fiber, fragment, and pellet), and two size groups (larger and smaller than 1000 micrometers) are considered for counting and separation. According to the obtained results, the most frequent percentage of shape, size, and color of microplastics belongs to fiber shape, size smaller than 1000 micrometers and dark colors in Khazarabad station and white and transparent in Galugah station. Also, the abundance of microplastic in each Caspian white fish was estimated to be 1.77±0.83 particles in Khazarabad station and 1.39±0.37 in Golugah station. Given the commercial importance and widespread consumption of this fish, especially along the Caspian Sea coast, planned monitoring is necessary on the major fishing shores of the Caspian Sea.
کلیدواژه‌ها [English]
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