Determination of Trace Element Accumulation in Gonads of Rutilus kutum (Kamensky, 1901) from the South Caspian Sea Trace Element Contaminations in Gonads


Caspian kutum, Rutilus kutum Kamensky 1901, is a commercially important fish species in the southern basins of the Caspian Sea. In spite of the popularity and consumption of the gonads, muscles, and viscera of kutum as edible parts in the region, there is no report on concentrations of trace elements (TE) in its gonads. In this study, some 51 specimens of R. kutum caught from five different fishing regions (Astara, Anzali, Kiashahr, Sari, and Gorgan) in the southern shoreline of the Caspian Sea from September 2017 to January 2018. An inductively coupled plasma optical emission spectrometry (ICP-OES) was used to assay 36 element concentrations in fish gonads, but only 26 elements were detected and statistically analyzed. The concentration of elements in gonads (except for Ca, Sn, and Sr) did not exhibit significant differences between the eastern and western parts (p < 0.05) of the Caspian Sea. The Ca and Sr concentrations were higher in western parts (Astara, Anzali, and Kiashahr) than in eastern parts (Sari and Gorgan), while Sn showed higher levels in eastern as compared to western parts. In total, the element concentrations in this study were not higher than thresholds permitted by FAO/WHO and USFDA and pose no threat to human health.

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This study was financially supported by The Caspian Basin Research Center, University of Guilan, Rasht, Iran, File Number 21195170.

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Correspondence to Masoud Sattari.

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Significance Statement The gonad of fish is used as food in Iran, and this study was proposed to investigate the trace element in gonads and to determine the accumulation of trace elements in it.

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Sattari, M., Imanpour Namin, J., Bibak, M. et al. Determination of Trace Element Accumulation in Gonads of Rutilus kutum (Kamensky, 1901) from the South Caspian Sea Trace Element Contaminations in Gonads. Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci. 90, 777–784 (2020).

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  • Rutilus kutum
  • Caspian Sea
  • Heavy metals
  • Trace elements
  • Human health