Dragun, Zrinka; Filipović Marijić, Vlatka; Krasnići, Nesrete; Ivanković, Dušica; Valić, Damir; Žunić, Jakov; Kapetanović, Damir; Vardić Smrzlić, Irena; Redžović, Zuzana; Grgić, Ivana; Erk, Marijana (2018) Total and cytosolic concentrations of twenty metals/metalloids in the liver of brown trout Salmo trutta (Linnaeus, 1758) from the karstic Croatian river Krka. Ecotoxicology and Environmental Safety, 147 . pp. 537-549. ISSN 0147-6513
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Abstract
Total and cytosolic concentrations of twenty metals/metalloids in the liver of brown trout Salmo trutta (Linnaeus, 1758) were studied in the period from April 2015 to May 2016 at two sampling sites on Croatian river Krka, to establish if river water contamination with metals/metalloids downstream of Knin town has influenced metal bioaccumulation in S. trutta liver. Differences were observed between two sites, with higher concentrations of several elements (Ag, As, Ca, Co, Na, Se, Sr, V) found downstream of Knin town, whereas few others (Cd, Cs, Mo, Tl) were, unexpectedly, increased at the Krka River spring. However, total metal/metalloid concentrations in the liver of S. trutta from both sites of the Krka River were still mainly below previously reported levels for pristine freshwaters worldwide. The analysis of seasonal changes of metal/metalloid concentrations in S. trutta liver and their association with fish sex and size mostly indicated their independence of fish physiology, making them good indicators of water contamination and exposure level. Metal/metalloid concentrations in the metabolically available hepatic cytosolic fractions reported in this study are the first data of that kind for S. trutta liver, and the majority of analyzed elements were present in the cytosol in the quantity higher than 50% of their total concentrations, thus indicating their possible availability for toxic effects. However, the special attention should be directed to As, Cd, Cs, and Tl, which under the conditions of increased exposure tended to accumulate more within the cytosol. Although metal/metalloid concentrations in S. trutta liver were still rather low, monitoring of the Krka River water quality and of the health status of its biota is essential due to a trend of higher metal/metalloid bioaccumulation downstream of Knin town, especially taking into consideration the proximity of National Park Krka and the need for its conservation.
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| Additional Information: | This study was carried out in the scope of two projects: 1) "Accumulation, subcellular mapping and effects of trace metals in aquatic organisms" (Project no: IP-2014-09-4255), funded by the Croatian Science Foundation; and 2) "Assessment of water quality in the Krka River and the potential risks for the Krka National Park by using new methods and bioindicators", funded by the Adris Foundation. The financial support of the Ministry of Science and Education of the Republic of Croatia for institutional funding of the Laboratory for Biological Effects of Metals is also acknowledged. | ||||||||||||
| Uncontrolled Keywords: | Bioaccumulation; fish; freshwater; inorganic contamination; liver; subcellular distribution | ||||||||||||
| Subjects: | NATURAL SCIENCES > Chemistry > Analytic Chemistry NATURAL SCIENCES > Biology NATURAL SCIENCES > Interdisciplinary Natural Sciences > Environmental Science |
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| Divisions: | Division for Marine and Enviromental Research | ||||||||||||
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| Depositing User: | Zrinka Dragun | ||||||||||||
| Date Deposited: | 06 Dec 2019 11:34 | ||||||||||||
| URI: | http://fulir.irb.hr/id/eprint/5231 | ||||||||||||
| DOI: | 10.1016/j.ecoenv.2017.09.005 |
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