Investigating the toxicity of polylactic acid microplastics on the health and physiology of freshwater fish, Cirrhinus mrigala.

Autor: Rashid E; Fish Nutrition Laboratory, Department of Zoology, Government College University, Faisalabad, Punjab, 38000, Pakistan., Hussain SM; Fish Nutrition Laboratory, Department of Zoology, Government College University, Faisalabad, Punjab, 38000, Pakistan. drmakhdoomhussain@gcuf.edu.pk., Ali S; Department of Environmental Sciences, Government College University, Faisalabad, Punjab, 38000, Pakistan. shafaqataligill@gcuf.edu.pk.; Department of Biological Sciences and Technology, China Medical University, Taichung, 40402, Taiwan. shafaqataligill@gcuf.edu.pk., Sarker PK; Environmental Studies Department, University of California Santa Cruz, Santa Cruz, CA, 95060, USA., Farah MA; Department of Zoology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
Jazyk: angličtina
Zdroj: Ecotoxicology (London, England) [Ecotoxicology] 2024 Dec; Vol. 33 (10), pp. 1210-1221. Date of Electronic Publication: 2024 Oct 02.
DOI: 10.1007/s10646-024-02813-4
Abstrakt: The widespread presence of microplastics (MPs) in aquatic ecosystems has raised growing concerns among ecotoxicologists regarding their potential toxicity. This study explored the impacts of polylactic acid (PLA) MPs on the physiology and health of freshwater fish, Cirrhinus mrigala, by dietary exposure for 90 days. The experiment consisted of six groups: five treatment groups (0.5%, 1%, 1.5%, 2%, and 2.5% PLA-MP) and a control group (0% PLA-MP). Each group was comprised of fifteen fish, and the experiment was replicated three times. The exposure severity of PLA-MPs varied from low to high, with treatment levels ranging from 0.5% to 2.5% PLA-MPs, relative to the control group. This exposure significantly affected their growth performance. Additionally, the apparent digestibility of the SFM-based diet decreased with increasing PLA-MPs concentration. Exposure to PLA-MPs induced considerable changes in body composition, characterized by increased moisture and crude fat content and decreased ash content and crude protein. The blood profile, including MCHC, RBCs, Hb, PLT and PCV exhibited significant declines in the high treatment group (2.5% PLA-MPs), while MCH, WBCs and MCV showed notable increases. Furthermore, histopathological examination of the intestine revealed an increase in abnormalities in the intestine at 2.5% PLA-MPs level. The high treatment group (2.5% PLA-MPs) showed the lowest mineral content in the fish muscles. In summary, dietary exposure to PLA-MPs led to alterations in overall body performance across the treatment groups, ranging from low to high severity levels.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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