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Sublethal effects of polyvinyl chloride microplastics on growth performance and survival of whiteleg shrimp (Litopenaeus vannamei)
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Researchers exposed whiteleg shrimp to PVC microplastics over 45 days and found that even environmentally relevant concentrations reduced swimming, feeding, growth, and survival — with the highest exposure group showing only a 37% survival rate. The results highlight how microplastic pollution poses a direct threat to shrimp aquaculture productivity and food security.
This study investigated the sublethal effects of polyvinyl chloride (PVC) microplastics on whiteleg shrimp (Litopenaeus vannamei), focusing on behavior, growth, feed efficiency, and survival.Whiteleg shrimp were exposed to three concentrations of PVC microplastics (3, 6, and 9 mg/L) over 45 days.Results showed that higher exposure levels reduced swimming activity and feeding response, indicating physiological stress.Microplastics accumulated significantly in the digestive tract, with the highest average (85.04 particles/individual) found at the highest exposure level.Shrimp growth, measured as changes in body length and weight, declined with increasing microplastic concentration, as did feed conversion efficiency and specific growth rate.Survival also decreased sharply, with the lowest rate (37%) observed in the highest treatment group.These findings suggest that even environmentally relevant concentrations of PVC microplastics can impair shrimp health and aquaculture productivity.The study underscores the need for stricter waste management and recommends further research into long-term effects and mitigation strategies.
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Sublethal Exposure to Polystyrene Microplastics Alters Swimming Behaviour and Reduces Survival of Whiteleg Shrimp (Litopenaeus vannamei)
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Researchers exposed whiteleg shrimp to polystyrene microplastics at 0–30 mg/L over 45 days and found dose-related deterioration in swimming behavior and survival rates dropping from 73% in controls to roughly 32–37% in exposed groups, identifying behavioral shifts as a practical early-warning indicator of microplastic stress in aquaculture.
Microplastics exposure affects the feeding behavior of the whiteleg shrimp Litopenaeus vannamei by impairing the appetite, olfaction and digestion
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Researchers found that microplastic exposure significantly reduced feeding in whiteleg shrimp, a commercially important aquaculture species, with feed intake dropping by up to 28 percent. The microplastics impaired the shrimp's sense of smell, disrupted gut bacteria, and caused oxidative damage to their digestive systems. The findings suggest that microplastic pollution in aquaculture waters could harm shrimp growth and productivity through multiple interconnected pathways.
Insight into the immune and microbial response of the white-leg shrimp Litopenaeus vannamei to microplastics
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Researchers exposed white-leg shrimp (Litopenaeus vannamei) to different concentrations of microplastics for 48 hours and measured immune and microbial responses. The study found that high microplastic concentrations significantly reduced survival rates, altered immune-related gene expression, and disrupted the gut microbial community, suggesting that microplastic pollution may compromise shrimp immune function.
Effects of Microplastic Exposure against White Spot Syndrome Virus Infection in Pacific White Shrimp (Penaeus vannamei)
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Researchers tested whether microplastic exposure worsens viral infections in Pacific white shrimp. The study found that shrimp exposed to both microplastics and white spot syndrome virus experienced 50% mortality, while those exposed to just the virus alone survived, suggesting that microplastic contamination may compromise the immune defenses of farmed shrimp.
Impact of high-density polyethylene (HDPE) microplastics exposure on Penaeus vannamei survival
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Laboratory bioassays showed that high-density polyethylene microplastics were acutely toxic to Pacific white shrimp (Penaeus vannamei) postlarvae at concentrations above 62.5 mg/L, with 100% mortality at the highest dose, and confirmed ingestion via fluorescence microscopy.
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