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September 17, 2026Environmental Toxicology and ChemistryOpen Access

Multi-scale effects in early stages of the stenothermal fish, Arctic charr Salvelinus alpinus after combined exposure of temperature and gamma irradiation

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Authors

ERE Réalis-DoyelleNGN GuirandyOPO Perret

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Overview

Experimental study demonstrates sublethal metabolic and behavioral impairments in Arctic charr larvae exposed to radiation and warming, highlighting risks of combined environmental stressors.

Key Points

  • To evaluate the combined effects of elevated temperature and gamma irradiation on the development, phenotype, behavior, and oxidative stress biomarkers of Arctic charr (Salvelinus alpinus).
  • Exposed Arctic charr embryos to combined gamma irradiation (500 µGy h⁻¹) and thermal stress continuously until hatching.
  • Maintained larvae under thermal stress alone post-hatch until reaching the juvenile stage to monitor delayed phenotypic and behavioral impacts.
  • Early-life gamma irradiation at 500 µGy h⁻¹ induced sublethal adverse effects in Arctic charr larvae, impairing growth, metabolism, behaviour, and physiological stress responses.
  • Sublethal toxic effects persisted into post-hatching stages following combined thermal and radiation stress, altering key phenotypic traits without causing acute mortality.

Cite This Study

Réalis-Doyelle et al. (2026) studied this question.

synapsesocial.com/papers/6aabb6e95f706d05830e5a68https://doi.org/10.1093/etojnl/vgag247
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