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Polystyrene Microplastic Interferes with Yolk Reserve Utilisation in Early Artemia salina Nauplii
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Researchers exposed brine shrimp (Artemia salina) nauplii to polystyrene microplastics and found reduced hatching rates, slower growth, and signs of oxidative stress. Histological analysis revealed that the microplastics interfered with yolk reserve utilization, delaying resorption and impairing gut function in the developing larvae. The study suggests that microplastic exposure during early development can disrupt nutrient absorption critical for growth in aquatic organisms.
Polystyrene microfragments are among the most common plastic pollutants globally. They significantly affect aquatic life, harming various organs and tissues. In this study, we examined the effects of 3 µm polystyrene beads (MPs, 20 µg/L) on development and yolk resorption in pre-feeding nauplii of Artemia salina, a lecithotrophic crustacean used in toxicity testing. Results showed a reduced hatching rate, slower growth, and the onset of oxidative stress. Histological analysis revealed no significant morphological alteration; however, yolk platelets lost N-acetyl galactosamine (galNAc), and resorption was delayed. Lectin staining also showed a reduction in N-acetyl glucosamine (glcNAc) in the gut brush border, indicating impaired gut function. Gas chromatography detected the release of nanogram amounts of toxic volatile compounds (VOCs, ethylbenzene, xylene, benzaldehyde, and styrene) into the culture medium. In conclusion, the data demonstrate a delay in larval yolk resorption that can likely be attributed to the release of VOCs, which induce oxidative stress. Further research is urgently needed, given the potential biological and ecological implications of this finding.
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Researchers studied the uptake, elimination, and intestinal effects of polystyrene microplastics on brine shrimp larvae. They found that the larvae ingested microplastics at rates dependent on concentration, exposure time, and food availability, and that the particles caused intestinal damage. The study demonstrates that microplastic contamination can harm the health and feeding behavior of zooplankton larvae, which are critical components of marine food webs.
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Researchers exposed brine shrimp larvae to polystyrene microspheres at various concentrations with and without a food source over seven days. They found that microplastic ingestion was dose-dependent and significantly influenced by food availability, with the highest contamination occurring when no food was present. The study suggests that microplastic pollution can disrupt feeding behavior and delay development in early life stages of marine organisms.
Effects of ingested polystyrene microplastics on brine shrimp, Artemia parthenogenetica
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Brine shrimp larvae (Artemia parthenogenetica) were exposed to 10 μm polystyrene microspheres at concentrations close to environmentally extrapolated levels, with microspheres clearly ingested and accumulated in the gut, resulting in reduced feeding rates and growth at higher concentrations. The study demonstrates that microplastic ingestion by brine shrimp, a widely used aquaculture feed organism, occurs at ecologically relevant concentrations and causes sublethal harm.
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Brine shrimp (Artemia franciscana) exposed to polystyrene nanoplastics ingested and bioaccumulated the particles, which also affected their feeding behavior on microalgae and caused changes in gut microbiota. These effects on a widely used aquaculture species raise concerns about nanoplastic contamination in marine food production.
Sublethal Effects of Polystyrene Nanoplastics on the Embryonic Development of Artemia salina (Linnaeus, 1758)
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Researchers exposed brine shrimp embryos to amino-modified polystyrene nanoplastics of two sizes and assessed a range of developmental effects. They found that the nanoplastics accumulated in the organisms and caused sublethal effects including altered hatching rates and developmental abnormalities, even at non-lethal concentrations. The study suggests that nanoplastic pollution may pose risks to the early development of organisms at the base of aquatic food chains.
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