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Concentrations and relative compositions of metallic elements differ between predatory squid and filter-feeding sardine from the Indian and South Atlantic oceans
North-West University, South Africa.
Department of the Environment, South Africa.
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.ORCID iD: 0000-0002-5972-1852
North-West University, South Africa.
2020 (English)In: Regional Studies in Marine Science, ISSN 0080-0694, E-ISSN 2168-1376, Vol. 35, article id 101137Article in journal (Refereed) Published
Abstract [en]

Although metallic elements occur naturally, they can occur or accumulate in organisms at levels toxic to the organism and/or their consumers. Concentrations of twenty-nine metallic elements in muscle tissue from sardine Sardinops sagax and chokka squid Loligo reynaudii from South Atlantic and Indian Ocean waters off South Africa were established, for the first time, using inductively-coupled plasma mass spectrometry. Chokka showed significantly higher (p < 0.05) concentrations of B, Cr, Zn, As, Se, Rb, Sr, Cd, and Tl and significantly lower concentrations of V, Mn, Ti, and Mo compared to sardine. There were also significant differences in some metallic elements between the two oceans. Multivariate analyses indicated possible population structure of both species, suggesting that these analyses may be useful as a stock discrimination tool. Only two sardine samples contained quantifiable Hg. Based on South African estimated daily intake, total hazard quotient, and European Union limits for Hg, Cd, and Pb, we consider tissues from sardine and chokka in South African waters to be safe for human consumption.

Place, publisher, year, edition, pages
Koenigstein, Germany: Koeltz Scientific Books , 2020. Vol. 35, article id 101137
Keywords [en]
Ecotoxicology, heavy metals
National Category
Environmental Sciences Oceanography, Hydrology and Water Resources Ecology Geochemistry
Identifiers
URN: urn:nbn:se:liu:diva-163558DOI: 10.1016/j.rsma.2020.101137OAI: oai:DiVA.org:liu-163558DiVA, id: diva2:1392844
Available from: 2020-02-13 Created: 2020-02-13 Last updated: 2020-02-17Bibliographically approved

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Kylin, Henrik

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