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PlasM - Microplastic in fish
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This project report summarizes findings on microplastic pollution in North and Baltic Sea fish from the PlasM research project. Key findings include evidence that fish ingest microplastics orally, but microplastic fiber exposure had no detectable effect on fertilization, early development, growth, or immune function in stickleback.
The seafloor of the North and Baltic Sea is mainly polluted with plastic litter. • Fish take up microplastic orally. • Microplastic fibers in the water do not affect fertilization and early development of fish. • Ingested microplastic fibers had no effect on growth and the immune system of sticklebacks.
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Exposure of three-spined stickleback eggs and larvae to microplastic fibers at environmentally relevant concentrations had no significant effect on fertilization success, hatching rates, embryonic survival, or early larval development, suggesting that microplastic fibers alone may not impair early life stages of this species under realistic conditions.
Less impact than suspected: Dietary exposure of three-spined sticklebacks to microplastic fibers does not affect their body condition and immune parameters
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Assessing the Biological Effects of Exposure to Microplastics in the Three-Spined Stickleback (Gasterosteus aculeatus) (Linnaeus 1758)
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This thesis assessed the biological effects of microplastic ingestion in three-spined stickleback fish, documenting ingestion, retention, and excretion of different microplastic types and sizes across life stages. The study found that trophic transfer is an additional route for fish to ingest microplastics, and that larger particles caused gastrointestinal blockages, while smaller ones passed through but may have subtler effects.
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