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Accumulation of Microcystins in Nile Tilapia, Oreochromis niloticus L., and Effects of a Complex Cyanobacterial Bloom on the Dietetic Quality of Muscles

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Abstract

The aim of this study was to investigate the kinetics of accumulation and elimination of microcystins in the tissues of Nile tilapia (Oreochromis niloticus) and to evaluate the effect of cyanobacterial exposure on fish muscle quality (levels of total fat and ash, protein, dry matter and the composition of saturated, monounsaturated and polyunsaturated fatty acids). Fish were exposed for 28 days to a natural cyanobacterial bloom with total microcystin concentration around 1,200 μg g−1 biomass dry weight. The hepatopancreas accumulated microcystins up to 350 ng g−1 fresh weight, but concentrations in muscle were generally below the detection limit (2 ng g−1 fresh weight). Following the exposure, fish were moved to the clean water, but only minor microcystin removal from the hepatopancreas was observed during a 4 week depuration period. Exposures of tilapia to the complex cyanobacterial bloom had only minor and temporary impacts on the investigated parameters of dietetic quality.

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Acknowledgments

The authors highly acknowledge comments of two anonymous referees that substantially helped to improve quality of the manuscript. This study was supported by the Ministry of Education, Youth and Sports of the Czech Republic “Veterinary aspects of food safety and quality” No. MSM6215712402, Research plan No. MSM6215648905 “Biological and technological aspects of sustainability of controlled ecosystems and their adaptability to climate change, and by the National Agency for Agricultural Research (grant No. QH 71015)”. Infrastructure is supported by a project CETOCOEN (no. CZ.1.05/2.1.00/01.0001) from the European Regional Development Fund.

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Authors and Affiliations

  1. University of Veterinary and Pharmaceutical Sciences, Palackého 1-3, 612 42, Brno, Czech Republic

    Miroslava Palikova & Stanislav Navratil

  2. Department of Fishery and Hydrobiology, Mendel University, Zemědělská 1, 613 00, Brno, Czech Republic

    Jan Mares, Radovan Kopp & Jana Hlavkova

  3. Faculty of Science, Research Centre for Toxic Compounds in the Environment, RECETOX, Masaryk University, Kamenice 126/3, 625 00, Brno, Czech Republic

    Ondrej Adamovsky & Ludek Blaha

  4. Medistat, Slavíčkova 7, 638 00, Brno, Czech Republic

    Lubomír Chmelar

  5. Institute of Botany, Czech Academy of Sciences, Lidická 25/27, 657 20, Brno, Czech Republic

    Radovan Kopp & Ludek Blaha

Authors
  1. Miroslava Palikova
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  2. Jan Mares
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  3. Radovan Kopp
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  4. Jana Hlavkova
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  5. Stanislav Navratil
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  6. Ondrej Adamovsky
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  7. Lubomír Chmelar
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  8. Ludek Blaha
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Corresponding author

Correspondence to Radovan Kopp.

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Palikova, M., Mares, J., Kopp, R. et al. Accumulation of Microcystins in Nile Tilapia, Oreochromis niloticus L., and Effects of a Complex Cyanobacterial Bloom on the Dietetic Quality of Muscles. Bull Environ Contam Toxicol 87, 26–30 (2011). https://doi.org/10.1007/s00128-011-0279-y

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  • DOI: https://doi.org/10.1007/s00128-011-0279-y

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