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Oxidative Stress and Histopathological Effects by Microplastic Beads, in the Crayfish Procambarus Clarkii, and Fiddler Crab Leptuca Pugilator
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Single and combined exposure of rockfish (Sebastes schlegeli) to polystyrene microbeads and cadmium resulted in elevated accumulation in gills and intestines, increased liver oxidative stress, and significant apoptosis in combined-exposure fish compared to single-pollutant groups. The synergistic toxic effect demonstrates that microplastics acting as vectors for heavy metals amplify harm beyond either pollutant alone, with downstream implications for seafood safety and human dietary exposure.
Oxidative stress and histopathological effects by microplastic beads, in the crayfish Procambarus clarkii, and fiddler crab Leptuca pugilator
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Researchers exposed crayfish and fiddler crabs to polystyrene microplastic beads for one month and examined the effects on their hepatopancreas, a key digestive organ. Both species showed signs of oxidative stress and tissue damage, with microplastic particles accumulating in their organs. The study provides evidence that even at moderate concentrations, microplastic exposure can cause measurable physiological harm to freshwater and coastal crustaceans.
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Researchers exposed two clam species to polystyrene nanoplastics and measured antioxidant enzyme responses across multiple tissues, finding that oxidative stress patterns varied by species, organ, dose, and time, with gills showing the highest sensitivity and damage levels returning to baseline after a recovery period.
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