Animal Taxonomy and Ecology Laboratory, Department of Life Sciences, Hemchandracharya North Gujarat University, Patan 384265, Gujarat, India.
Department of Fisheries and Marine Science, Faculty of Science, Noakhali Science and Technology University, Noakhali, Bangladesh.
Sci Total Environ. 2023 Dec 20;905:167500. doi: 10.1016/j.scitotenv.2023.167500. Epub 2023 Sep 30.
Microplastic (MP) pollution has increased drastically due to improper plastic waste management. The present study aimed to investigate the MPs contamination in the commercially important brachyuran crab Portunus segnis of Gujarat State, India. One hundred fifty crab specimens were collected from three principal fishing harbors in Gujarat. The collected specimens were analyzed for MP extraction using a previously documented protocol. The chemical composition of extracted MPs was assessed with ATR-FTIR. The average abundance of MPs contamination was recorded as 0.82 ± 0.58 MPs/g and 2.02 ± 1.48 MPs/individual. Findings of Contamination Factor (CF) revealed that study site Jakhau was identified as a low-contamination site, while Okha and Veraval were considered moderately contaminated. The H index has identified study sites Jakhau and Veraval as class IV risk categories, while study site Okha fell into the class V risk category. PRI value revealed the very high contamination of MPs in all the study sites. The guts were recorded as being more contaminated with MPs than the gills. The average abundance of MP contamination in males (0.77 ± 0.14 MPs/g in Jakhau, 1.19 ± 0.77 MPs/g in Okha, and 0.82 ± 0.43 MPs/g in Veraval) was recorded higher than in females (0.33 ± 0.11 MPs/g in Jakhau, 0.8 ± 0.49 MPs/g in Okha, and 0.75 ± 0.41 MPs/g in Veraval) in all the study sites. The average abundance of MP contamination varied significantly between males and females. Fibers were found dominantly in all study sites, followed by fragments, films, and foams. Black and blue-colored MPs with 1-2 mm sizes were found more abundantly. The chemical composition of the extracted MPs revealed polyethylene, nylon, polyurethane, and polystyrene as polymer compositions. Overall, the present study highlighted the MP contamination in commercially important crabs that can be used as a basis for further studies on ecotoxicology and seafood safety.
由于塑料废物管理不当，微塑料（MP）污染急剧增加。本研究旨在调查印度古吉拉特邦具有商业重要性的短尾梭子蟹 Portunus segnis 中的 MPs 污染情况。从古吉拉特邦的三个主要渔港采集了 150 只蟹标本。使用先前记录的方案提取 MPs 后对采集的标本进行分析。用衰减全反射傅里叶变换红外光谱法（ATR-FTIR）评估提取 MPs 的化学成分。记录 MPs 污染的平均丰度为 0.82 ± 0.58 MPs/g 和 2.02 ± 1.48 MPs/个体。污染因子（CF）的结果表明，研究地点 Jakhau 被确定为低污染地点，而 Okha 和 Veraval 被认为是中度污染地点。H 指数将研究地点 Jakhau 和 Veraval 确定为第四类风险类别，而研究地点 Okha 则属于第五类风险类别。PRI 值表明所有研究地点的 MPs 污染非常严重。与鳃相比，肠道被记录为受 MPs 污染更严重。Jakhau 中雄性（0.77 ± 0.14 MPs/g）、Okha 中雄性（1.19 ± 0.77 MPs/g）和 Veraval 中雄性（0.82 ± 0.43 MPs/g）的 MPs 污染平均丰度高于雌性（Jakhau 中 0.33 ± 0.11 MPs/g、Okha 中 0.8 ± 0.49 MPs/g 和 Veraval 中 0.75 ± 0.41 MPs/g）。所有研究地点的雄性和雌性之间的 MPs 污染平均丰度差异显著。纤维在所有研究地点都占主导地位，其次是碎片、薄膜和泡沫。1-2 毫米大小的黑色和蓝色 MPs 更为常见。提取 MPs 的化学成分表明，聚合物组成为聚乙烯、尼龙、聚氨酯和聚苯乙烯。总的来说，本研究强调了商业上重要的螃蟹中的 MPs 污染，这可以作为进一步研究生态毒理学和海鲜安全的基础。
