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Assessment of microplastic contamination in some commercial fishes of the southern Caspian Sea and its potential risks

Environmental Science and Pollution Research 2024 24 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Mohammad Gholizadeh, Mohammad Gholizadeh, Mohammad Gholizadeh, Mohammad Gholizadeh, Mohammad Gholizadeh, Mohammad Gholizadeh, Tahereh Bagheri, Tahereh Bagheri, Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique Mohammad Zakeri, Mohammad Gholizadeh, Mohammad Gholizadeh, Tahereh Bagheri, Tahereh Bagheri, Mohammad Gholizadeh, Mohammad Gholizadeh, Mohammad Gholizadeh, Mohammad Zakeri, Mohammad Abdul Momin Siddique Tahereh Bagheri, Mohammad Gholizadeh, Mohammad Harsij, Mohammad Zakeri, Tahereh Bagheri, Mohammad Gholizadeh, Tahereh Bagheri, Mohammad Zakeri, Mohammad Gholizadeh, Durali Danabaş, Mohammad Zakeri, Mohammad Abdul Momin Siddique Mohammad Gholizadeh, Mohammad Abdul Momin Siddique Mohammad Gholizadeh, Mohammad Gholizadeh, Mohammad Gholizadeh, Mohammad Zakeri, Mohammad Zakeri, Mohammad Zakeri, Mohammad Abdul Momin Siddique Durali Danabaş, Mohammad Abdul Momin Siddique Mohammad Abdul Momin Siddique

Summary

Researchers examined microplastic contamination in the digestive tracts of 384 fish from four species collected across 11 sites in the southern Caspian Sea. Evidence indicates that nearly 69% of fish contained microplastics, with fibers being the most common type, highlighting widespread plastic pollution in this important inland sea and potential risks to both aquatic life and human seafood consumers.

Polymers

PP PS

Body Systems

Digestive

This study examined the occurrence of microplastics (MPs) in the gastrointestinal tract (GIT) of 384 fishes classified into four species from 11 sites in 2022 from the southern part of the Caspian Sea. GITs of fishes were collected and digested in HO and KOH at 45 °C for 72 h. After filtration, extracted MPs were observed under a stereomicroscope, and selected MP particles were identified using FTIR. Presence of MPs was 68.98% in the GIT of the investigated fish. The mean abundance of MPs was 5.9 ± 0.9 MPs/GIT in Rutilus kutum, 9.2 ± 1.2 MPs/GIT in Chelon auratus, 3.6 ± 0.7 MPs/GIT in Alosa braschnikowi, and 2.7 ± 0.5 MPs/GIT in Vimba vimba. The predominant form of MPs was fiber (58.21%), followed by fragment (34.77%). Black (34.4%), white (19.07%), and blue (14.58%) were the most frequently detected colors of MPs. Overall, 6 MP polymers were identified, dominantly polypropylene (42.86%), polystyrene (17.86%), and cellophane (14.28%). The western part of the Caspian Sea (mostly tourist spots and urban areas) showed more MP pollution in fish compared to the eastern part. Polymer hazard index (PHI) revealed alarming microplastic contamination in the southern Caspian Sea. The PHI value of the present study showed that PES (PHI = 8403.78) and PS (PHI = 535.80) were "Extreme danger" and "Danger" risk categories, respectively.

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