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AuthorKhatir, Zenaba
AuthorRange, Pedro
AuthorMalik, Mahak
AuthorAl-Naimi, Hajer
AuthorBen Hamadou, Radhouane
AuthorLeitão, Alexandra
Available date2020-08-11T06:42:44Z
Publication Date2020-02-01
Publication NameRegional Studies in Marine Science
Identifierhttp://dx.doi.org/10.1016/j.rsma.2020.101054
CitationKhatir, Z., Range, P., Malik, M., Al-Naimi, H., Hamadou, R. B., & Leitão, A. (2020). Is it forever? Genotoxicological impact of marine contaminants on Arabian/Persian Gulf bivalves: An experimental approach. Regional Studies in Marine Science, 34, 101054.
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85077739131&origin=inward
URIhttp://hdl.handle.net/10576/15465
Abstract© 2020 Elsevier B.V. A novel approach of combining manipulative field experiments and cytogenetic endpoints was used to assess the genotoxic impact of chemical contamination on a local model bivalve species, the pearl oyster -Pinctada imbricata radiata. Baseline levels of Polycyclic Aromatic Hydrocarbons (PAHs), Total Petroleum Hydrocarbons (TPHs) and trace metals were determined from surface sediments and pearl oyster tissue collected from 3 coastal locations in Qatar (Umm Bab, Dukhan and Al-Wakra). Initial aneuploidy –numerical chromosomal abnormality-level in oysters was also assessed during the baseline survey. The oysters’ ability to adapt to new sites, with distinct signatures in terms of chemical contamination, was assessed using a reciprocal transplantation experiment among the same 3 coastal locations, from February to April 2016. Significant differences in sediment contamination levels were detected among the 3 sites. TPHs were in higher concentrations at Umm Bab (western coast), while higher concentrations of metals and PAHs were found at Dukhan (western coast) and Al-Wakra (eastern coast), respectively. Oysters transplanted between locations showed lower levels of aneuploidy, relative to those kept in the original location (controls). Transplanted oysters, regardless of the contamination levels at the origin and destination, showed recovery from initial aneuploidy levels. Moreover, there was a larger percentage of aneuploid cells with chromosomal gain than with chromosomal loss in all treatments, which contrasts with the pattern usually observed in bivalves.
SponsorThis work was supported by Qatar University [grant QUSTCAS-FALL-15/16-32]. The authors are thankful to the QU-DBES staff: Mariam Safi, DM Estremadura, Khwaja Abdul Matheen, Abdol Ali Moghaddasi and Muhammad Habeeb. Also thanks to the QU-ESC staff: Noora Al Shamary, Hassan Hassan, Mazen Assali, Sara Al Saadi, Mariem Bastaki and Hamood Al Saadi. The authors are also grateful to Ismail Al-Shaik and Linso Varghese from Exxon Mobil for helping with the inorganic analysis and to Dr. Elizabeth Goergen, for proofreading the manuscript.
Languageen
PublisherElsevier
SubjectAneuploidy
Genotoxicity
Hydrocarbon contamination
Hyperdiploidy
Metal contamination
Pinctada imbricata radiata
TitleIs it forever? Genotoxicological impact of marine contaminants on Arabian/Persian Gulf bivalves: An experimental approach
TypeArticle
Pagination101054
Volume Number34
ESSN2352-4855
dc.accessType Abstract Only


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