Abstrakt
Dynamiczny rozwój nanotechnologii spowodował, że współczesna literatura naukowa poświęca dużo uwagi nanotoksykologii. Niewiele badań z tego obszaru dotyczy ekspozycji ryb na nanocząstki in vivo, drogą pokarmową. Prezentowana praca omawia to zagadnienie na przykładzie larw i narybku jazia Leuciscus idus (L.). W eksperymencie utworzono grupę kontrolną ryb żywioną starterem komercyjnym (grupa „K”) oraz grupy ryb, którym podawano paszę z dodatkiem roztworu nanocząstek srebra o nominalnym stężeniu 5 mg l-1 i 50 mg l-1 (grupa „5”, grupa „50”). Eksperyment trwał 90 dni. Analizowano wzrost, kondycję i przeżywalność ryb. Badano obraz histologiczny jelita, wątroby i skrzeli. Wzrost ryb w 30 i 60 dniu doświadczenia wskazywał na pozytywny wpływ dodatku nanocząstek Ag do paszy, podobnie jak w przypadku kondycji ryb w grupie „5” w 90 dniu doświadczenia. Obecność nanocząstek srebra w paszy wpłynęła negatywnie na przeżywalność ryb. W jelitach, wątrobie oraz skrzelach ryb eksponowanych na nanocząstki Ag wystąpiły zmiany patologiczne.
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