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Long-term effects of tyre-wear particles ingestion on the physiology, behaviour and reproduction of marine medaka fish (Oryzias melastigma)
Summary
Researchers conducted a long-term exposure study feeding tyre-wear particles (TWPs) to marine medaka (Oryzias melastigma) to evaluate effects on growth, reproduction, and behaviour, tracking 32 individuals per tank over multiple generations. The study found that chronic TWP ingestion produced measurable physiological and reproductive impairments in this marine fish model, providing evidence that tyre-derived microplastics represent a significant ecological hazard to marine fauna.
Tyres are widely used globally and are a significant source of microplastics (MPs) for the marine environment. Tyre-wear particles (TWPs) are microplastics generated by the friction of tyres with the ground. They can contain various types of plastics and other contaminants in their composition. The effects on marine fauna ingesting this type of mixture are have not been fully described, so the aim of this research is to evaluate the effects of TWPs ingestion on the growth, reproduction and behaviour of Oryzias melastigma (marine medaka). For this, marine medaka individuals (n=32 per tank) obtained from the fish facility at Ifremer (kept at 27 ± 1 °C and a 14 h/10 h light/dark cycle) were chronically fed, starting at 2 months post fertilisation, for 4 months with a mix of commercial food and TWPs ( 170 µm in average size obtained from shredded tyre fragments) in 3 different treatments: Control (without TWPs), Low (0.1 Also see: https://micro2024.sciencesconf.org/559375/document