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Swimming behaviour in two ecologically similar three-spined (Gasterosteus aculeatus L.) and nine-spined sticklebacks (Pungitius pungitius L.): a comparative approach for modelling the toxicity of metal mixtures

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Abstract

Sticklebacks (Gasterosteiformes) are increasingly used in ecological and evolutionary research and have become well established as role model species for biologists. However, ecotoxicology studies concerning behavioural effects in sticklebacks regarding stress responses, mainly induced by chemical mixtures, have hardly been addressed. For this purpose, we investigated the swimming behaviour (including mortality rate based on 96-h LC50 values) of two ecologically similar three-spined (Gasterosteus aculeatus) and nine-spined sticklebacks (Pungitius pungitius) to short-term (up to 24 h) metal mixture (MIX) exposure. We evaluated the relevance and efficacy of behavioural responses of test species in the early toxicity assessment of chemical mixtures. Fish exposed to six (Zn, Pb, Cd, Cu, Ni, and Cr) metals in the mixture were either singled out by the Water Framework Directive as priority or as relevant substances in surface water, which was prepared according to the environmental quality standards (EQSs) of these metals set for inland waters in the European Union (EU) (Directive 2013/39/EU). The performed behavioural analysis showed the main effect on the interaction between time, species, and treatment variables. Although both species exposed to MIX revealed a decreasing tendency in swimming activity, these species’ responsiveness to MIX was somewhat different. Substantial changes in the activity of G. aculeatus were established after a 3-h exposure to MIX solutions, which was 1.43-fold lower, while in the case of P. pungitius, 1.96-fold higher than established 96-h LC50 values for each species. This study demonstrated species-specific differences in response sensitivity to metal-based water pollution, indicating behavioural insensitivity of P. pungitius as model species for aquatic biomonitoring and environmental risk assessments.

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The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We are grateful to Violeta Ptašekienė for her assistance with manuscript editing.

Funding

This research was supported by the research infrastructure Open Access Centre for Nature Research at the initiative of the Open R&D Lithuania network. This work was funded by the Research Council of Lithuania, Project No. S-MIP-21-10, MULTIS.

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T. Makaras conceived the presented idea, planned the experiments, carried out the data analysis, and took the lead in writing the manuscript. The coauthor M. Stankevičiūtė performed analytical calculations and contributed to the interpretation of the obtained results. Both authors discussed the results and commented on the manuscript.

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Correspondence to Tomas Makaras.

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All applicable international (EU), national, and institutional guidelines for the care and use of animals were followed.

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The authors declare no competing interests.

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Responsible Editor: Bruno Nunes

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Makaras, T., Stankevičiūtė, M. Swimming behaviour in two ecologically similar three-spined (Gasterosteus aculeatus L.) and nine-spined sticklebacks (Pungitius pungitius L.): a comparative approach for modelling the toxicity of metal mixtures. Environ Sci Pollut Res 29, 14479–14496 (2022). https://doi.org/10.1007/s11356-021-16783-1

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  • DOI: https://doi.org/10.1007/s11356-021-16783-1

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