Size and concentration effects of microplastics on digestion and immunity of hybrid snakehead in developmental stages

Chaonan Zhang; Zhengkun Pan; Shaodan Wang; Guohuan Xu; Jixing Zou

Aquaculture Reports (Feb 2022)

Size and concentration effects of microplastics on digestion and immunity of hybrid snakehead in developmental stages

Chaonan Zhang,
Zhengkun Pan,
Shaodan Wang,
Guohuan Xu,
Jixing Zou

Affiliations

Chaonan Zhang: Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China; State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
Zhengkun Pan: Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
Shaodan Wang: Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
Guohuan Xu: State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
Jixing Zou: Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China; Corresponding author at: Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China.

Journal volume & issue: Vol. 22
p. 100974

Abstract

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Microplastics pollution has gained much attention for its harmful impact on aquatic organisms. This study aimed to evaluate the size-effects and concentration-effects of microplastics on the physiology of hybrid snakehead (Channa maculate × Channa argus). Parameters including antioxidant enzyme activities, intestinal morphology, immune-related genes, and oxidative-stress-related genes were tested in two life stages development. The results showed hybrid snakehead larvae (0.057 ± 0.009 g in weight) were more intolerant to high concentrations of small-sized microplastics. Hybrid snakehead juvenile (3.87 ± 1.19 g in weight) had been stimulated the immune response and triggered antioxidant defenses under the exposure stress. There were differential expressions of inflammatory and oxidative-stress-related genes coping with differential sizes and concentrations of microplastics. High concentrations of microplastics (2 mg/L, 20 mg/L) stimulated more severe immune response and shortened intestinal villi. In addition, the damaged intestinal morphology and function did not recover after 48 h of depuration. This work is expected to provide a meaningful perspective for better understanding the size and concentration dependent effects and life-stage specific effects of microplastics in hybrid snakehead.

Published in Aquaculture Reports

ISSN: 2352-5134 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Agriculture: Aquaculture. Fisheries. Angling
Website: http://www.journals.elsevier.com/aquaculture-reports/

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