Trace Metal Distribution in Five Fish Species from Selected Aquatic Environments in Bangladesh
DOI:
https://doi.org/10.54536/ijphpp.v1i1.8934Keywords:
Aquaculture Feed, Aquatic Contamination, Atomic Absorption Spectrophotometry, Bangladesh Fish Tissues, Trace MetalsAbstract
The evaluation of trace metal in fish should be conducted not only on edible fish tissues, but also on internal tissues, since the concentration in the internal tissues may be significantly different from that in the edible tissues. The present exploratory study investigated the levels of lead, cadmium, chromium, nickel and copper in the five fish species of the Balu River and Meghna Ghat and a fish farm of the Gazipur district in Bangladesh. Fish was collected in January 2017 and laboratory was carried out in the period of February- July 2017 at the Bangladesh Council of Scientific and Industrial Research (CSIR). Before being analyzed by atomic absorption spectrophotometry, tissue and feed samples were digested. Supplementary environmental information was provided by water characteristics and six commercially available feeds. The level of copper was observed up to 142.79 ppm in liver of mrigal and 50.95 ppm in rohu liver. The concentration of nickel was found to be 131.15 ppm in chewa gut and 32.11 ppm in spotted snakehead muscle. Lead level was 1.36 ppm in mrigal muscle while lead in the rohu, mrigal and chewa muscle and other tissues was undetectable. These observations reveal that they are significantly enriched in a tissue-specific manner except for muscle. The interpretation of statistics and regulation is limited by unreported replication, detection limits and concentration weight basis. If there were more than one entry that conflicted, then those entries were not corrected; they remained unresolved. Results here support directed confirmatory monitoring of edible tissues, enhanced analytical record keeping, and simultaneous monitoring of fish, water, sediment and aquaculture inputs. They do not represent population exposure or nonconforming with the regulations.
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