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Assessment of the bioaccumulation pattern of Pb, Cd, Cr and Hg in edible fishes of East kolkata Wetlands, India
Saudi Journal of Biological Sciences ( IF 4.4 ) Pub Date : 2021-09-17 , DOI: 10.1016/j.sjbs.2021.09.039
Joystu Dutta 1 , Sufia Zaman 2 , Tarun Kumar Thakur 3 , Sandeep Kaushik 3 , Abhijit Mitra 4 , Poonam Singh 5 , Ravinder Kumar 6 , Ali Tan Kee Zuan 7 , Mohammad Shahzad Samdani 8 , Sulaiman Ali Alharbi 9 , Rahul Datta 10
Affiliation  

Waste water fed pisciculture is nowadays a common feature in aquaculture belts across the globe. East Kolkata Wetlands (EKW) a nature’s wonder where waste water fed natural aquaculture beltis is active for more than 70 years now and is efficiently operating as a natural waste management system. The peri urban wetland is also a site of international importance and is listed in Ramsar. Field and lab-based investigations were carried out using three commonly edible carp variety of fishes such as Rohu (Labeorohita), Catla (Catlacatla) and Nile Tilapia (Oreochromisniloticus) collected from ponds (bheries) of the wetland located on the eastern fringes of Kolkata, India. The lab-based analysis revealed the presence of toxic metals such as Cr, Pb, Cd and Hg in the samples with the seasonal order of accumulation being monsoon > post-monsoon > winter > pre-monsoon in the successive years of 2016, 2017 and 2018. Bio-accumulation of toxic heavy metals in fishes follows the order Tilapia > Rohu > Catla where as the bioaccumulation pattern of toxic metals shows the trend Pb > Cd > Cr > Hg across all the seasons and years. The ambient media was also investigated to understand in detail the bioaccumulation pattern at different trophic levels of the ecosystem. Water and sediments were analyzed to evaluate the contamination of toxic heavy metals from point and non-point sources. Current study shows the observed bioaccumulation pattern of the toxic heavy metals in one of the fragile ecosystems that raises an important question of environmental safety in the food we intake on daily basis.



中文翻译:

印度东加尔各答湿地可食用鱼类中铅、镉、铬和汞的生物富集模式评估

如今,废水养鱼已成为全球水产养殖带的共同特征。东加尔各答湿地 (EKW) 是大自然的奇迹,这里的废水喂入天然水产养殖带已经活跃了 70 多年,并且作为天然废物管理系统有效运行。城郊湿地也是一个具有国际重要性的地点,并被列入拉姆萨尔。使用三种常见的可食用鲤鱼品种进行实地和实验室调查,例如罗胡 (Labeorohita)、卡特拉(Catlacatla)和尼罗罗非鱼(Oreochromisniloticus)从位于印度加尔各答东部边缘的湿地池塘 (bheries) 收集。实验室分析显示,2016 年、2017 年和 2017 年连续几年样品中存在 Cr、Pb、Cd 和 Hg 等有毒金属,其积累的季节顺序为季风 > 季风后 > 冬季 > 季风前2018. 鱼类中有毒重金属的生物积累遵循罗非鱼 > 肉豆蔻 > Catla 的顺序,其中有毒金属的生物积累模式在所有季节和年份中呈现出 Pb > Cd > Cr > Hg 的趋势。还研究了环境介质,以详细了解生态系统不同营养水平的生物积累模式。对水和沉积物进行分析,以评估点源和非点源对有毒重金属的污染。

更新日期:2021-09-17
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