ArticleBulletin of environmental contamination and toxicology2026
Dietary Microplastics are Eliminated Through Feces, Causing Metabolic Impairment in the Marine Amphipod Parhyale hawaiensis.
Article in Bulletin of environmental contamination and toxicology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The toxicity of microplastics (MPs) can vary depending on the route of exposure, yet the effects of dietary exposure remain poorly understood. In this study, we evaluated the effects of chronic dietary exposure to MPs on the marine amphipod Parhyale hawaiensis (Dana, 1853) over 35 days. Amphipods were exposed to 53-63 µm polyethylene microspheres (18 ± 4 MPs per food unit) through their diet. We assessed survival, reproduction, molting frequency, condition factor, oxygen consumption, MP accumulation, and fecal elimination. P. hawaiensis readily ingested and excreted MPs via feces. Exposure to MPs significantly increased oxygen consumption in exposed individuals (0.21 ± 0.053 mg O
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