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Microplastics in the Mediterranean blue mussel (Mytilus galloprovincialis Lamarck, 1819) and the European flat oystter (Ostrea edulis Linnaeus, 1758) in the Bay of Šibenik
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This Croatian thesis examined microplastic contamination in Mediterranean mussels and flat oysters from Sibenik Bay, Croatia. Researchers collected organisms from commercial aquaculture sites and analyzed microplastic abundance and types using standardized methods.
U lipnju 2019. na području šibenskih uzgajališta dagnji prikupljeni su organizmi za analizu mikroplastike u komercijalno bitnim školjkašima. Ciljane vrste, na kojima je vršeno istraživanje, bile su mediteranska dagnja (Mytilus galloprovincialis) i kamenica (Ostrea edulis). Razlozi uzimanja navedenih vrsta kao pokazatelja količine mikroplastike u morima su sljedeći: školjkaši su filtratori koji filtriranjem mora dolaze u kontakt s fragmentima plastike manjima od 5 mm u promjeru te u svojim tkivima filtriranjem nakupljaju mikroplastiku, ukoliko je ona prisutna u morskom okolišu. Osim toga, bitno je procijeniti rizik konzumiranja navedenih vrsta jer su gastronomski važne. Organska tvar iz školjkaša otopljena je u 10-postotnoj otopini kalijevog hidroksida (KOH), nakon čega je sadržaj filtriran na filter papirima koji su osušeni. Filteri su pregledani pod lupom i fotografirani u slučaju da je mikroplastika bila prisutna na njima. Nadalje, izmjerene su osnovne morfometrijske značajke istraživanih jedinki. Rezultati istraživanja pokazuju da je mikroplastika bila prisutnija u dagnjama, nego u kamenicama, a treba napomenuti da se na području prikupljanja organizama dagnje uzgajaju na klasičan način, odnosno na pergolarima, dok su kamenice bile prikupljene iz divljine u blizini samog uzgajališta.
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