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Comparative assessment of selected heavy metal load in three tilapiine species inhabiting Osinmo Reservoir, Southwestern, Nigeria

dc.contributor.authorOlofinko, Ayomide Omolara
dc.contributor.authorAdewole, Henry Adefisayo
dc.contributor.authorOlaleye, Victor Folorunso
dc.descriptionSaabunud / Received 30.11.17 ; Aktsepteeritud / Accepted 12.06.18 ; Avaldatud veebis / Published online 12.06.18 Vastutav autor / Corresponding author: Henry Adefisayo Adewole e-mail: hensaigebnnos_2k@yahoo.comest
dc.description.abstractThe levels of selected heavy metal in the water and fillets of Tilapia zillii Gervais, Sarotherodon galilaeus Trewavas and Oreochromis niloticus Lineaus in Osinmo Reservoir were assessed and compared with established regulatory limits of WHO and FEPA with a view to providing information on the water and the fish fillet heavy metal load as well as the fillet bio-accumulative potential as a likely indicator for human fish consumption safety. Water samples and fish specimens were collected monthly from Osinmo Reservoir, Ejigbo, Southwestern, Nigeria for a period of 6 months. The descaled-dried fish fillet and water samples were digested and analysed for lead, chromium, iron, zinc and cadmium using Atomic Absorption Spectrophotometer (A.A.S.). The data obtained were subjected to descriptive and inferential statistics using SPSS 21. The results showed that zinc concentration which was the highest in the water samples and ranged between 144 μg l-1 and 288 μg l-1 was also the highest in the fillets of all the cichlid species. However, the concentrations were within the mandatory regulatory limits. The result of the study also revealed significant differences (P < 0.05) in heavy metal loads of the fish fillets between the cichlid fish species from Osinmo Reservoir. Irrespective of the month of sampling, the heavy metal levels in fish fillets samples were found to increase in the order: O. niloticus > T. zillii > S. galilaeus. However, the levels of lead (11.00–26.00 μg l-1 and 15.00–31.00 μgL-1) and cadmium (6.33–13.00 μg l-1 and 2.33–12.33 μg l-1) which was the least in both water and fish fillet respectively, were above the recommended regulatory acceptable limit of WHO and FEPA. The study concluded that the elevated levels of lead and cadmium in the water and the fish fillet samples assayed indicated that the two elements negatively impacted the fish fillet quality, thereby raising human health consumption safety issues.eng
dc.identifier.publicationAgraarteadus : Journal of Agricultural Science, 2018, vol. 29, no. 1, pp. 29-40est
dc.publisherEstonian Academic Agricultural Societyeng
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)
dc.rights.holderAuthors of accepted articles retain all rights to use, reuse, and distribute the published research as long as the author credits the original publication in this journal. The authors submitting to the journal are expected to follow the general ethical guidelines regarding plagiarism. If in doubt consult the ICMJ guidelines on overlapping publications. Once accepted the journal retain the right to print and distribute the manuscript submitted by the author.eng
dc.subjectheavy metaleng
dc.subjectOsinmo reservoireng
dc.titleComparative assessment of selected heavy metal load in three tilapiine species inhabiting Osinmo Reservoir, Southwestern, Nigeriaeng


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