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The use of chitosan as an antioxidant in the feed of cultivated P. vannamei shrimp against oxidative stress induced by exposure to microplastics

Marine Environmental Research 2024 4 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Larissa Müller, Larissa Müller, Larissa Müller, Chaelen Rodrigues Ortiz, Chaelen Rodrigues Ortiz, Larissa Müller, Larissa Müller, Larissa Müller, Lucélia do Valle Borges, Virgínia Fonseca Pedrosa, Luiz Antônio de Almeida Pinto, Juliane Ventura‐Lima, Larissa Müller, Juliane Ventura‐Lima, Virgínia Fonseca Pedrosa, Lucélia do Valle Borges, Tito Roberto Sant’Anna Cadaval, Juliane Ventura‐Lima, Juliane Ventura‐Lima, Luís Alberto Romano Larissa Müller, Juliane Ventura‐Lima, Juliane Ventura‐Lima, Marcelo Borges Tesser, Luís Alberto Romano Wilson Wasielesky, Virgínia Fonseca Pedrosa, Juliane Ventura‐Lima, Luís Alberto Romano Wilson Wasielesky, Wilson Wasielesky, Tito Roberto Sant’Anna Cadaval, Juliane Ventura‐Lima, Larissa Müller, Luiz Antônio de Almeida Pinto, Wilson Wasielesky, Juliane Ventura‐Lima, Luís Alberto Romano

Summary

Researchers tested whether adding chitosan to shrimp feed could protect farmed shrimp from oxidative stress caused by microplastic exposure. They found that chitosan supplementation helped counteract the harmful oxidative effects of microplastics on shrimp tissues. The findings suggest that natural antioxidants like chitosan could be a practical strategy for reducing microplastic-related damage in aquaculture.

Body Systems

Hepatic Musculoskeletal

Microplastics (MP) are omnipresent in aquaculture and can induce several toxic effects, mainly oxidative stress. Therefore, alternatives to minimize these effects are welcome. In this study, chitosan (1 and 3 g/kg) was supplemented through the feed of farmed shrimp P. vannamei for 30 days. After this period, the shrimp were exposed to MP (0.5 mg/L) for 7 days. The results showed the presence of MP in hepatopancreas, gills and muscle. Hepatopancreas morphological alterations, as well as lipid peroxidation, a decrease in GSH level, and an increase in SOD activity indicated an oxidative stress that was reversed by chitosan. The muscle was also affected by MP, showing decreased CAT activity and increased SOD activity, though no lipid peroxidation was observed. In muscle, chitosan reversed the SOD increase to basal activity. The results obtained showed that chitosan was more effective against oxidative stress than in preventing accumulation and histological damage.

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