First evidence of microplastics ingestion by freshwater fishes from Nong Luang Wetland, Chiang Rai, Thailand

Kittichai Chantima, and Krittawit Suk-Ueng, and Paridchaya Intep, and Saritporn Vittayapadung, (2023) First evidence of microplastics ingestion by freshwater fishes from Nong Luang Wetland, Chiang Rai, Thailand. Sains Malaysiana, 52 (9). pp. 2471-2483. ISSN 0126-6039


Official URL:


Microplastic (MP) ingestion has been reported in several marine species but knowledge regarding MPs in freshwater species is limited, with only a few studies on the occurrence of MPs in freshwater fish, particularly in Thai freshwater ecosystems. The aim of this study was to assess the occurrence of MPs for the first time in the gastrointestinal tracts (GITs) of freshwater fishes from the Nong Luang Wetland, Chiang Rai, Thailand. A total of 100 fish specimens representing 15 species from 8 families were examined. Basic fish measurements as total length and total weight were used to calculate Fulton’s condition index (F). The GITs were subsequently removed and MPs were extracted by visual inspection and digestion solution. Qualitative attributes such as color and MP types (fibers, rod-shaped and fragments) were also recorded. Results showed relatively low MP prevalence at 21.0%, with 25 MP particles removed from the GITs of specimens representing 7 species. The number of ingested MP particles ranged between 1 and 4 per fish, with an average of 1.19±0.68. MP particles were categorized as fibers (92.0%), rod-shaped (4.0%) and fragments (4.0%) with blue fibers the most prevalent. No significant correlations were observed between the number of MP particles and the body length, weight, and F value of fish. These findings provide the first evidence of MP contamination in fishes from a Thai wetland as a baseline for future studies and risk assessments on the biota of many aquatic systems spread across the country.

Item Type:Article
Keywords:Blue fibre; Fishing gear; Freshwater fish; Microplastic; Wetland
Journal:Sains Malaysiana
ID Code:23077
Deposited By: Siti Zarenah Jasin
Deposited On:16 Feb 2024 03:00
Last Modified:16 Feb 2024 03:00

Repository Staff Only: item control page