Hexbyte Glen Cove
Because this research looked at PLA microplastic particles, the researchers also tested feeding the perch with kaolin particles, a white clay used for porcelain and to coat paper. Fish fed with kaolin showed some minor changes in behavior. However, a male sex hormone was affected and some other gene expressions in the fish was curbed, such as the response to stress.
“We see that PLA is not harmless to fish, so it should not be sold as an environmentally friendly alternative to ordinary plastic. It should be considered as equivalent to ordinary plastic,” says Azora.
Fish were fed for six months with food containing 2 percent PLA, which is about the concentration of ordinary petrochemical plastic used in previous studies. The quantity of kaolin fed to another group of fish was also 2 percent. In addition, there was also a control group of perch fed with uncontaminated food.
The research is published in the journal Science of The Total Environment.
More information:
Azora König Kardgar et al, Chronic poly(l-lactide) (PLA)- microplastic ingestion affects social behavior of juvenile European perch (Perca fluviatilis), Science of The Total Environment (2023). DOI: 10.1016/j.scitotenv.2023.163425
Citation:
Biodegradable plastic from sugar cane also threatens the environment, finds new research (2023, June 1)
retrieved 1 June 2023
from https://phys.org/news/2023-05-biodegradable-plastic-sugar-cane-threatens.html
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