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Screening for microplastics in gastrointestinal tract of sea bream (Sparus aurata) from the Northern Adriatic
Summary
Researchers screened the gastrointestinal tracts of commercially important sea bream (Sparus aurata) from the Northern Adriatic for microplastic contamination, sampling fish during autumn and spring spawning periods and digesting intestines in potassium hydroxide solution. They found 77 microplastic particles in autumn and 17 in spring, with fibers being the most common morphology.
Onečišćenje okoliša plastikom godinama je aktualan problem koji privlači pozornost ekologa, ali i šire opće javnosti. Obzirom na svoju osjetljivost, morskom okolišu se posebno pridaje pozornost po pitanju ovog problema. Cilj ovoga rada bio je utvrditi koliko se mikroplastike akumulira u najčešćoj komercijalnoj vrsti Jadranskog mora, točnije u oradi Sparus aurata. U Istarskoj županiji tijekom jeseni i proljeća uzorkovale su se jedinke orada za vrijeme mrijesta, a njihova probavila testirana su na prisutnost mikroplastike. Probavila suse otapala u otopini kalijeva hidroksida (KOH). Na posljetku razgrađena probavila su se promatrala pod mikroskopom. U probavilima je pronađeno 77 čestica u jesenskom periodu, te 17 čestica u proljetnom periodu. Najčešći oblik čestica bile su niti (eng. fiber). Prema boji najprisutnije su niti crne boje, čak njih 53 %, dok je pronađeno manje plavih 22 % i 14 % zelenih čestica. Determinacija glavnih izvora onečišćenja pojedinih prostora kao i bolje razumijevanje mehanizma ingestije mikroplastike kod riba trebaju predstavljati glavni fokus u budućim istraživanja.
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