Cadmium in the fish of Hatillo: a silent indicator of aquatic contamination
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This study identified and assessed cadmium concentration in benthic fish from the Hatillo Dam, Sanchez Ramirez province, Dominican Republic. The methodology included an experimental analytical design, with sample preparation following the EPA 3050B acid digestion protocol and quantification via atomic absorption spectrophotometry (AOAC International method). Thirty adult specimens of three species were analyzed: Tilapia (Oreochromis niloticus), common carp (Cyprinus carpio), and catfish (Ictalurus punctatus), collected through stratified random sampling at six points in the reservoir. Cadmium concentrations ranged from 0.184 to 0.228 mg/kg, exceeding by 3.7 to 4.6 times the maximum limit of 0.050 mg/kg established by the World Health Organization for fishery products.
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