Microplastics in commercial fish digestive tracts from freshwater habitats in Northern Thailand

Q2 Agricultural and Biological Sciences Ecologica Montenegrina Pub Date : 2023-11-03 DOI:10.37828/em.2023.68.6
Kriengkrai Seetapan, Taeng On Prommi
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Abstract

Microplastics (MPs) contamination in fish species was one of the emerging environmental issues as a result of the widespread presence of plastic pollution in the environment. The presence of MPs in Thailand's freshwater was scant, and in contrast to other countries, little was known about the presence of this contaminant in freshwater fish. Hence, the purpose of this study was to examine the abundance, characteristics, and variation of MPs in various Thai commercial freshwater fish species. In order to compare the differences in MP ingestion rates across different feeding zones, 166 fish representing 24 species from various feeding zones were collected. MPs were found in the gastrointestinal tracts (GIT) of all fish samples tested, which was a substantially larger number than previously reported in other locations. Of all the fish species, Anabas testudineus, Labeo rohita, and Oreochromis mossambicus had the highest concentration of MPs (34.90 ± 21.43, 34.50 ± 7.78, 34.10 ± 11.15 items/individuals). Microscopical examinations showed that the majority of MPs were fiber-shaped and blue in color. Fourier transform infrared analysis (FTIR) showed that the polymers found in fish GIT were polyethylene, polypropylene, polyethylene terephthalate, polyvinyl acetate, poly (methyl vinyl ether), poly (methyl vinyl ether), polybutadiene, poly (ethylene-co-propylene), poly (ethylene glycol) tetrahydrofurfuryl ether, poly (methyl phenyl siloxane), poly (styrene-co-divinylbenzene), and polyvinylidene fluoride. The results of this study demonstrate that demersal fish had a higher concentration of MPs than benthopelagic and pelagic fish, indicating that plastic ingestion in fish may be related to the feeding habitat. However, it was not discovered that differences in the fish's body weight and length affected the MPs' ingestion. Our findings will help people in Thailand understand which freshwater fish and fish from which feeding zones are more contaminated with MPs for human consumption.
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泰国北部淡水栖息地商业鱼类消化道中的微塑料
由于塑料污染在环境中广泛存在,鱼类中的微塑料污染是新出现的环境问题之一。泰国淡水中存在的MPs很少,与其他国家相比,人们对淡水鱼中存在这种污染物知之甚少。因此,本研究的目的是研究泰国各种商业淡水鱼中MPs的丰度、特征和变异。为了比较不同摄食区的MP摄食率差异,我们收集了来自不同摄食区的24种166条鱼。在所有测试的鱼类样本的胃肠道(GIT)中都发现了MPs,这比以前在其他地方报道的数量要多得多。在所有鱼类中,泥鳅(Anabas testudineus)、拉贝(Labeo rohita)和莫sambicus的MPs浓度最高,分别为34.90±21.43、34.50±7.78和34.10±11.15条/只。显微镜检查显示,大多数MPs呈纤维状,颜色为蓝色。傅里叶变换红外分析(FTIR)表明,在鱼类GIT中发现的聚合物有聚乙烯、聚丙烯、聚对苯二甲酸乙二醇酯、聚醋酸乙烯酯、聚(甲基乙烯醚)、聚(甲基乙烯醚)、聚(甲基乙烯醚)、聚(乙烯-共丙烯)、聚(乙二醇)四氢呋喃醚、聚(甲基苯基硅氧烷)、聚(苯乙烯-共二乙烯基苯)和聚偏氟乙烯。本研究结果表明,底栖鱼类的MPs浓度高于底栖和中上层鱼类,表明鱼类的塑料摄取量可能与摄食栖息地有关。然而,没有发现鱼的体重和长度的差异会影响MPs的摄取量。我们的研究结果将帮助泰国人了解哪些淡水鱼和哪些喂养区的鱼受MPs污染更严重,以供人类食用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ecologica Montenegrina
Ecologica Montenegrina Agricultural and Biological Sciences-Animal Science and Zoology
CiteScore
1.80
自引率
0.00%
发文量
89
审稿时长
3 weeks
期刊介绍: Ecologica Montenegrina (ISSN 2336-9744 (online) | ISSN 2337-0173 (print)) is peer-reviewed journal in which scientific articles and reports are quickly published. The papers are in the fields of taxonomy, biogeography and ecology (for example: new taxa for science, taxonomic revision, and/or fundamental ecology and biogeography papers). Open access publishing option is strongly encouraged for authors with research grants and other funds. For those without grants/funds, all accepted manuscripts will be published but access is secured for subscribers only.
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