Microplastic pollution in perch (Perca fluviatilis, Linnaeus 1758) from Italian south-alpine lakes. (1st November 2021)

• Record Type: Journal Article
• Authors: Galafassi, Silvia; Sighicelli, Maria; Pusceddu, Antonio; Bettinetti, Roberta; Cau, Alessandro; Temperini, Maria Eleonora; Gillibert, Raymond; Ortolani, Michele; Pietrelli, Loris; Zaupa, Silvia; Volta, Pietro
• Is Part Of: Environmental pollution. Volume 288(2021)
• Publication Date: 2021-11-01
• Subjects: Emerging contaminants -- Plastic polymers -- Microplastic ingestion -- Freshwater fish -- Plastic litter -- Uptake -- Exposure; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2021.117782
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: Microplastic particles (MPs) contamination of aquatic environments has raised a growing concern in recent decades because of their numerous potential toxicological effects. Although fish are among the most studied aquatic organisms, reports on MPs ingestion in freshwater environments are still scarce. Thus, there is still much to study to understand the uptake mechanisms, their potential accumulation among the food webs and their ecotoxicological effects. Here, MPs presence in the digestive system of one of the most widespread and commercially exploited freshwater fish, the perch ( Perca fluviatilis, Linnaeus 1758), was investigated in four different south-alpine lakes, to assess the extent of ingestion and evaluate its relation to the body health condition. A total of 80 perch specimen have been sampled from the Italian lakes Como, Garda, Maggiore and Orta. Microplastic particles occurred in 86% of the analysed specimens, with average values ranging from 1.24 ± 1.04 MPs fish −1 in L. Como to 5.59 ± 2.61 MPs fish −1 in L. Garda. The isolated particles were mainly fragments, except in L. Como where films were more abundant. The most common polymers were polyethylene, polyethylene terephthalate, polyamide, and polycarbonate, although a high degree of degradation was found in 43% of synthetic particles, not allowing their recognition up to a single polymer. Despite the high number of ingested MPs, fish health (evaluated by means of Fulton's body condition and hepatosomatic index) was not affected. Instead, fullness index showed an inverse linear relationship with the number of ingested particles, which suggests that also in perch MPs presence could interfere with feeding activity, as already described for other taxa. Graphical abstract: Image 1 Highlights: Microplastics ingestion by perch occurred in all the studied environments. Mean ingestion ranged from 1.24 in Lake Orta to 5.59 MPs fish −1 in Lake Garda. A high degree of degradation was found among the isolated synthetic particles. Particles ingestion did not affect fish health. Microplastics occurrence was higher in empty stomachs.