We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Microplastic Ingestion in Three Deep-Sea Fish Species: First Ecological Insights from Stable Isotope Analysis
AI summary Read the abstract
Scientists found microplastics in over a third of deep-sea fish sampled from the Mediterranean Sea, confirming that plastic pollution has reached even fish living far from the surface and human activity. Interestingly, what a fish ate didn't affect how much plastic it swallowed, but it did influence the size and variety of plastic particles found in its gut—meaning different fish species may carry different types of plastic contamination. Since some of these deep-sea fish end up in the human food supply, this research helps scientists better understand how plastic moves through ocean food webs and eventually onto our plates.
Microplastic (MP) pollution is an emerging environmental stressor in marine ecosystems, yet its relationship with trophic ecology remains poorly understood in deep-sea environments. This study investigated MP ingestion in relation to trophic ecology in three deep-sea fish species (Chlorophthalmus agassizi, Hoplostethus mediterraneus, and Coelorinchus caelorhincus) from the central Tyrrhenian Sea (Western Mediterranean). Stable isotope analysis (δ13C and δ15N) was combined with detailed characterisation of ingested MPs to assess trophic niches, trophic position, and species-specific ingestion patterns. The three species showed distinct isotopic signatures, with C. agassizi occupying a lower trophic position, while H. mediterraneus and C. caelorhincus overlapped at higher trophic levels. MPs were detected in all species, with an overall frequency of occurrence of 34.4%, and no significant interspecific differences in occurrence or abundance were observed. However, significant differences emerged in MP characteristics. C. caelorhincus, which exhibited the widest isotopic niche, ingested larger and more diverse particles, whereas C. agassizi showed lower occurrence but higher particle loads in affected individuals. These results suggest that trophic ecology is not clearly associated with MP ingestion rates but may influence the size and diversity of ingested particles, highlighting ecological drivers of exposure in deep-sea ecosystems.
More Papers Like This
Linking stable isotopes and microplastic exposure in pelagic fish from the Sea of Oman: Habitat use and ecological niche effects
AI summary Read the abstract
Scientists found microplastics—mostly tiny blue fibers—in the guts of three popular fish species from the Sea of Oman, with over half of all fish tested containing plastic bits. Interestingly, where and how a fish lives and feeds mattered more for plastic exposure than its position in the food chain, meaning even fish we might assume are "cleaner" eaters could still be swallowing plastic. Since these fish are commonly eaten by people, this research helps identify which environmental factors put seafood at higher risk for microplastic contamination, information that matters for anyone who eats fish regularly.
Does the microplastics ingestion patterns and polymer composition vary across the oceanic zones? A case study from the Indian coast
AI summary Read the abstract
Researchers examined microplastic ingestion in 27 species of deep-sea fish from the Central Indian Ocean and found contamination in 19 of them, with PET being the most common polymer. The study suggests that feeding behavior, rather than habitat depth or trophic level, is the primary factor influencing how much microplastic deep-sea fish ingest, and proposes these fish could serve as indicators for monitoring deep-sea plastic pollution.
Tracing the route: Using stable isotope analysis to understand microplastic pathways through the pelagic-neritic food web of the Tyrrhenian Sea (Western Mediterranean)
AI summary Read the abstract
Stable isotope analysis of three pelagic fish species in the Tyrrhenian Sea found no significant effect of trophic position on microplastic ingestion frequency, but species at higher trophic levels ingested a greater diversity of microplastic types including larger particles.
Microplastic in the stomachs of open-ocean and deep-sea fishes of the North-East Atlantic
AI summary Read the abstract
Researchers investigated microplastic occurrence in the stomachs of 390 fish from three pelagic and two deep-sea species in the North-East Atlantic, comparing plastic ingestion between fish occupying contrasting ocean compartments. The study documented microplastic presence across species at different depths, highlighting how plastic contamination extends throughout the oceanic water column.
Occurrence of microplastics in the gastrointestinal tract of benthic by–catches from an eastern Mediterranean deep–sea environment
AI summary Read the abstract
Microplastics were found in the gastrointestinal tracts of eight deep-sea fish species collected as bycatch from the eastern Mediterranean near Sardinia, including all three shark species sampled, demonstrating microplastic contamination in deep-sea ecosystems at depths down to several hundred meters.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.