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Papers
61,005 resultsShowing papers similar to A fishy tale: the impact of multiple stressors on host behaviour, physiology, and susceptibility to infectious disease
ClearMulti stress system: Microplastics in freshwater and their effects on host microbiota
This study examined how combined exposure to microplastics and organic chemical pollutants affects freshwater organisms through a multi-stress approach, focusing on gut microbiome changes as an indicator. Microplastic exposure in combination with other pollutants altered microbiome composition more than either stressor alone, with potential consequences for host fitness and disease resistance.
Hampered Survival Strategies and Altered Fish Behaviour Under the Threat of Fluoxetine, Microplastics, Mercury Toxicity, Thermal Discharge, and Pesticides
This review examines how multiple aquatic stressors — mercury pollution, microplastics, fluoxetine, pesticides, and thermal discharge — impair fish behavior and survival, covering disrupted predator avoidance, foraging, reproduction, and neurological function across species.
Interactive Threats: Multi-stress Systems in Aquatic Environments
Researchers examined how aquatic organisms face multiple simultaneous stressors — including plastic pollution, climate change, altered pH, and habitat loss — finding that the combined interactive effects of these threats are poorly understood yet critical to developing effective conservation and management strategies.
Exposure to microplastics impairs fish's major behaviors. A novel threat to aquatic ecosystem
This review synthesises evidence on how microplastic exposure alters key behaviours in fish including feeding, reproduction, predator avoidance, and social interaction. It identifies neurological disruption, chemical co-toxicity, and gut effects as primary mechanisms, and highlights exposure to realistic environmental concentrations as an ongoing knowledge gap.
Microplastics and behavioral changes in fish: an integrative review
This integrative review synthesizes the scientific literature on how microplastic exposure affects fish behavior, covering feeding, reproduction, predator avoidance, and social interactions. Exposure to microplastics consistently disrupted behavioral endpoints across fish species, with effects linked to oxidative stress, neurotoxicity, and endocrine disruption.
The role of environmental stress in fish health: A review
This review examines how environmental stressors including temperature changes, pesticide contamination, microplastics, and algal blooms affect fish health. Researchers found that these factors substantially influence fish growth, reproduction, respiration, and metabolic function. The study emphasizes the need for new strategies to address the growing impact of environmental changes on aquatic ecosystems and the global fish economy.
Microplastics in Limnic Ecosystems - Investigation of Biological Fate and Effects of Microplastic Particles and Associated Contaminants in Zebrafish (Danio rerio)-
This doctoral thesis investigated how microplastics and their associated chemical contaminants affect zebrafish (Danio rerio) in freshwater environments, including ingestion, tissue accumulation, and toxicological effects. The research demonstrates that microplastics can act as vectors for pollutants like pesticides and pharmaceuticals, compounding their harmful effects on aquatic organisms.
From plankton to fish: The multifaceted threat of microplastics in freshwater environments
This review summarizes how microplastics harm freshwater organisms from tiny plankton to fish through oxidative stress, inflammation, DNA damage, gut microbiome disruption, and metabolic disorders. Microplastics often combine with other pollutants in water, making their toxic effects even worse. Since freshwater systems are a major pathway for microplastics entering oceans and our food supply, understanding these effects is critical for protecting both ecosystems and human health.
Plastics in our water: Fish microbiomes at risk?
This review examined how microplastics and leached plasticizers affect the gut microbiomes of freshwater and marine fish, summarizing evidence for dysbiosis and reduced microbial diversity and discussing potential consequences for fish immunity, metabolism, and environmental fitness.
Toxicity Effects of Microplastics Individually and in Combination the Fish Pathogen Yersinia Ruckeri on the Rainbow Trout (Oncorhynchus Mykiss)
Researchers found that co-exposure of rainbow trout to polystyrene microplastics and the fish pathogen Yersinia ruckeri exacerbated blood biochemical disruptions and hepatic oxidative stress compared to either stressor alone. The results suggest microplastics may act as a predisposing factor that amplifies bacterial infection severity in fish.
The Toxicity of Polyethylene Microplastic Exposure and Its Concurrent Effect With Aeromonas Hydrophila Infection To Zebrafish
This study exposed adult zebrafish to polyethylene microplastics while simultaneously infecting them with Aeromonas hydrophila bacteria, a common fish pathogen. Microplastic exposure worsened bacterial infection outcomes, suggesting that plastic pollution may reduce fish immune defenses. The interaction between microplastic contamination and disease susceptibility is relevant to understanding how pollution affects aquatic ecosystem health.
Effect of microplastics on Yersinia ruckeri infection in rainbow trout (Oncorhynchus mykiss)
Researchers found that microplastic exposure predisposed rainbow trout to more severe Yersinia ruckeri infections, with co-exposed fish showing worse blood biochemical parameters and hepatic oxidative stress compared to fish exposed to the pathogen alone.
Testing the health status of marine and fresh waters by investigating microplastics in the stomach contents of different fish species
This PhD project investigated microplastic presence in stomach contents of fish from four sites ranging from a commercial port to a lake, characterizing microplastic types and abundances to assess environmental health status across marine, brackish, and freshwater ecosystems.
Water Quality and Fish Health: Interaction with Toxic Substances
This review examines how various toxic substances in water, including microplastics, affect fish health through physiological, behavioral, and biochemical pathways. Researchers summarized evidence that pollutants can accumulate in fish tissues and impair their immune systems, reproduction, and organ function. The study emphasizes that declining water quality from emerging contaminants poses growing risks to aquatic ecosystems and the species that depend on them.
Microplastic-stressor responses are rarely synergistic in freshwater fishes: A meta-analysis
A meta-analysis of 838 responses from 36 studies found that combined microplastic-stressor effects on freshwater fish are predominantly antagonistic (48%) or additive (34%), with synergistic effects least frequent at only 17%. This means that addressing either microplastic pollution or co-occurring stressors individually is likely to produce positive outcomes, rather than both needing to be resolved simultaneously.
Microplastics as an Emerging Threat to the Freshwater Fishes: a Review
This review examines microplastics as an emerging threat to freshwater fishes, covering their sources from cosmetics and plastic debris fragmentation, routes of entry including wastewater treatment plants, and documented toxic effects on fish physiology and behavior.
Co-exposure to microplastics and bisphenol A increases viral susceptibility in largemouth bass (Micropterus salmoides) via oxidative stress
Researchers found that juvenile fish exposed to both microplastics and BPA (a chemical found in plastics) together became more susceptible to viral infection, even though neither pollutant alone had that effect. The combination shut down the fish's antioxidant defenses and caused liver cell death, weakening their immune system. This study is important because it shows that common pollutants can interact in unexpected ways, and real-world exposure to multiple contaminants may be more dangerous than lab tests of single substances suggest.
Presença e efeitos da poluição plástica em peixes marinhos e de água doce
This thesis (in Portuguese) investigates plastic contamination in freshwater and marine fish, examining physiological, functional, and ecological effects across multiple levels of biological organization, including food safety implications for human consumption. The author finds that the scientific community has made progress on understanding individual-level effects but that broader ecological impacts and ecosystem-level consequences remain underexplored. The work contributes important evidence that plastic pollution in fish poses intertwined risks for wildlife and the people who eat them.
Global meta‐analysis reveals diverse effects of microplastics on freshwater and marine fishes
This systematic review and meta-analysis examines the effects of microplastics on fish in both freshwater and ocean environments. The findings show that microplastics reduce feeding, impair digestion, slow growth, and weaken immune function in fish, which is concerning because contaminated fish are a major food source for people worldwide.
Drenched in microplastic environment: Physiological and metabolic disruptions in fish
This literature review synthesized studies on the physiological and metabolic disruptions microplastics cause in fish, finding impacts across multiple organ systems including the liver, gut, gills, and reproductive organs depending on particle type and exposure duration.
Assessing the Effects of Microplastics on Freshwater Fish
This review examines the growing body of research on how microplastics affect freshwater fish, documenting evidence of ingestion, tissue damage, immune system impairment, and gastrointestinal obstruction across multiple species. Researchers highlight that microplastics from personal care products and degraded plastic goods are accumulating in freshwater ecosystems at concerning rates. The study warns that combined with existing threats like overfishing and habitat loss, microplastic pollution could accelerate population declines in vulnerable fish species.
Ingestão e efeitos morfofisiológicos dos microplásticos em espécies de peixes da Amazônia Central
This Brazilian thesis investigates microplastic ingestion and its effects on fish from the Amazon basin, one of the world's most biodiverse freshwater systems. Given that aquatic organisms in even remote areas are exposed to microplastics, the research highlights risks to Amazon fish diversity and the potential for microplastics to disrupt aquatic food webs in previously pristine ecosystems.
Biological Indices as Markers of the Health of Cirrhinus mrigala under the Stress of Microplastics and Metal Nanoparticles
Researchers examined how low-density polyethylene microplastics and nickel oxide nanoparticles, individually and combined, affect the health of the freshwater fish Cirrhinus mrigala over 60 days of exposure and 60 days of recovery. They found that combined exposure caused significant declines in body condition, abnormal swimming behavior, excessive mucus secretion, and even tumor formation. The study suggests that the co-presence of microplastics and metal nanoparticles in waterways can have compounding adverse effects on fish health that do not fully resolve after the pollution source is removed.
Comprehensive systematic review and meta-analysis of microplastic prevalence and abundance in freshwater fish species: the effect of fish species habitat, feeding behavior, and Fulton’s condition factor
A meta-analysis of freshwater fish across 42 studies found an average of 2.35 microplastic items per individual, with 80% of research focused on the gastrointestinal tract and 58% on river environments. Contrary to expectations, microplastic ingestion correlated with fish body physiology (size and weight) rather than feeding behavior or habitat, suggesting physical characteristics determine uptake more than ecological niche.