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Ecotoxicological Effects of Microplastics on Bird Embryo Development by Hatching without Eggshell

Ecotoxicological Effects of Microplastics on Bird Embryo Development by Hatching without Eggshell

Published on: August 14, 2021

Polystyrene nanoplastics decrease molting and induce oxidative stress in adult Macrobrachium nipponense.

Wujiang Fan¹, Pinhong Yang², Yanping Qiao³

¹Shanghai Fisheries Research Institute (Shanghai Fisheries Technology Promotion Station), Shanghai, 200433, China; Hunan University of Arts and Science, Hunan, 41500, China.

Fish & Shellfish Immunology

|February 19, 2022

Summary

This summary is machine-generated.

Polystyrene nanoplastics (PS-NP) exposure impaired molting and induced oxidative stress in freshwater prawns Macrobrachium nipponense. These findings highlight the ecological risks of nanoplastics in aquatic environments.

Keywords:

Adult Macrobrachium nipponense Freshwater organism Molting Nanoplastics Reactive oxygen species

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Area of Science:

Environmental Toxicology
Aquatic Ecotoxicology
Nanotoxicology

Background:

Plastic waste is a global environmental concern.
Limited research exists on nanoplastic effects on freshwater organisms.
Polystyrene nanoplastics (PS-NP) are prevalent environmental contaminants.

Purpose of the Study:

To investigate the physiological effects of PS-NP on freshwater prawns.
To assess PS-NP impact on molting and oxidative stress enzyme activity.
To evaluate PS-NP toxicity in Macrobrachium nipponense at environmentally relevant concentrations.

Main Methods:

Adult freshwater prawns (Macrobrachium nipponense) were exposed to varying concentrations of PS-NP (0-40 mg/L) for 21 days.
Molting rates, growth, and survival were monitored.
Expression of molting-related genes and activities of oxidative stress enzymes (SOD, GST, GSH-Px) were analyzed.

Main Results:

Molting rates significantly decreased at 4 and 40 mg/L PS-NP.
Expression of key molting genes was significantly reduced.
Hydrogen peroxide (H2O2) levels increased, while oxidative stress enzyme activities showed concentration-dependent changes.

Conclusions:

Chronic exposure to PS-NP impairs molting in freshwater prawns.
PS-NP induces oxidative stress in Macrobrachium nipponense.
Findings contribute to the risk assessment of nanoplastics in aquatic ecosystems.