Naslov
Occurrence of microfibers in farmed gilthead seabream and common carp at different life stages

Autori
Savoca, Serena ; Capillo, Gioele ; D'Angelo, Giovanna ; Spano, Nunziacarla ; Di Paola, Davide ; Albano, Marco ; Matanović, Krešimir ; Gjurčević, Emil

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Journal of Biological Research / - , 2021, 54-55

Skup
93rd National Congress of the Italian Society of Experimental Biology

Mjesto i datum
Palermo, Italija, 22.04.2021. - 25.04.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
microfibers, gilthead seabream, common carp

Sažetak
Microplastic (MP) and microfiber (MF) pollution is a great concern worldwide due to their ubiquity in aquatic environment, becoming a potential threat to aquatic organisms. The accumulation of MPs in freshwater and marine environments can have strong ecological implications, mainly due to their long persistence, toxicity and ability to adsorb other pollutants and pathogens. However, less attention has given to MFs pollution, although they are no less polluting. In fact, whereas the number of studies on MPs ingestion by wild fish is constantly increasing, the current knowledge on the occurrence of MPs and MFs in farmed fish species remains scarce. In the present study, we investigated the occurrence of MPs and MFs in the digestive tracts of gilthead sea bream (Sparus aurata) and common carp (Cyprinus carpio), at different life stages, reared with different technologies. Larvae, fry and adult individuals of gilthead sea bream and common carp, were collected from two fish farms, located in Italy and Croatia respectively. 700 gilthead sea bream larvae and 795 common carp larvae were examined. The gastrointestinal tract of 60 fry and 20 adult samples specimens (commercial size) of each species was analysed and undertaken to chemical digestion for microparticles extraction. Plastic and non-plastic microitems were found in both fish species investigated, with microfibers ( 90%) as dominant type. The presence of microparticles was not detected at larval stage. Fry and adult gilthead sea bream individuals showed microfiber abundances of 0.21 and 1.3 items/specimen, respectively. A lower concentration of microparticles occurred in fry (0.06 items/individual) and adult common carp (0.25 items/individual). Polymer composition of extracted microparticles showed significant differences between the fish species analysed in this study. Natural (20%), semi-synthetic (28%), and single or blended synthetic fibers (52%) were identified in gilthead sea bream. Linen, rayon, lyocell, cotton: polyester and polyester (12.5%) fibers were identified in common carp, while PTFE (37.5) was present as fragments. In conclusion, a considerably lower contamination level of synthetic polymers (average 0.11 items/individual) was detected in farmed fishes compared with data reported by other authors on feral fish. The low number of microplastics found could depend on the contamination degree of fish farms location, culture water and commercial feed used in the farms under study. To the best of our knowledge, this is the first study describing plastic and non-plastic microfiber contamination in farmed S. aurata and C. carpio at different life stages.

Izvorni jezik
Engleski

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