Metal Contamination in Macrobrachium rosenbergii from Lupar River, Sarawak and its Risk to Human Health

Aleematun Farhana Bt Haron, - (2022) Metal Contamination in Macrobrachium rosenbergii from Lupar River, Sarawak and its Risk to Human Health. [Final Year Project Report] (Unpublished)

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Abstract

The abundance of Macrobrachium rosenbergii in the Lupar River has become a source of food and economic activity for the locals. The influence of human activity surrounding the Lupar River, has the potential to deteriorate the water quality and sediment, as well as the organic organisms inside it. The objectives of this study were to investigate the contamination level of heavy metals in the muscle tissues, hepatopancreas, exoskeletons, and gills of M. rosenbergii and to assess their risk to human health. The trend of heavy metal contamination in M. rosenbergii from the Lupar River are as follows: Cd (BDL) < Mn (3.22–24.22 mg/kg) < Cu (4.55–44.28 mg/kg < Co (33.63–126.03 mg/kg) < Al (388.42–60.67 mg/kg) < Fe (832.26– 42.49 mg/kg) with their concentrations high in hepatopancreas > gills > exoskeletons > muscle tissues. There was a positive correlation of total length and total weight of M. rosenbergii (r = 0.941, p < 0.001), indicated an increase in total length would result in an increase of total weight. A positive correlation of Cu, Mn, and Fe in muscle tissues, gills, and hepatopancreas was detected with the increasing size. The Lupar River has a Hazard Index (HI) of 80.94 for heavy metals which is hazardous to human health. All metals were above the permissible limits. Therefore, M. rosenbergii from Lupar River were contaminated enough to pose a high risk to human health.

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