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

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 thi...

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Veröffentlicht in:Marine environmental research 2024-11, Vol.202, p.106747, Article 106747
Hauptverfasser: Ortiz, Chaelen, Müller, Larissa, Borges, Lucélia, Pinto, Luiz Antônio de Almeida, Cadaval, Tito Roberto Sant'anna, Tesser, Marcelo Borges, Pedrosa, Virgínia Fonseca, Romano, Luis Alberto, Wasielesky, Wilson, Ventura-Lima, Juliane
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Sprache:eng
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Zusammenfassung: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. •Microplastic exposure induced histological damage in the gills, hepatopancreas, and muscle of Penaeus vannamei.•Microplastic exposure induced oxidative stress in the hepatopancreas and muscle of shrimps.•The supplementation of chitosan was shown to reverse some of the effects induced by microplastic exposure.•Chitosan can be a promising alternative to improve the oxidative state induced by microplastic exposure in farmed shrimps.
ISSN:0141-1136
1879-0291
1879-0291
DOI:10.1016/j.marenvres.2024.106747