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Oreochromis niloticus (Nile tilapia) and Ompok bimaculatus (Pena Walaya) are two edible fish species captured in the reservoirs in the north central province. Objective of this study was to assess the cadmium and arsenic levels in muscle, liver and kidney tissues of O. niloticus and O. bimaculatus inhabiting the Padaviya reservoir. The fishes (Nile Tilapia, n=30; body weight 180-300g, total length 19.0-24.1cm; Pena Walaya, n=30: body weight 110-225g, total length 24.0-34.0cm) were collected from the reservoir in three sampling events in 2018 and the tissues were analyzed for cadmium and arsenic levels using Inductively Coupled Plasma Mass Spectrometry. Potential associations of metal/metalloid levels in fish tissues with body weights, and total lengths of the fishes were also tested. Of the 60 fishes analysed, cadmium and arsenic contents the muscle tissues were below the limit of detection (

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