Inland Water Biology

, Volume 3, Issue 1, pp 90–95 | Cite as

Influence of biogenic metals (Cu, Zn) on the activity of carbohydrases in juvenile fish in vitro

  • I. L. Golovanova
Aquatic Toxicology


It was revealed that intestine and whole-body amylolytic activity (AA) in juvenile fish serving as potential feeding items for piscivores significantly decreases in the presence of Cu and Zn ions within a wide range (0.1–25 mg/l) of concentrations in vitro. In most of the studied fish species, Cu and Zn decrease the activities of carbohydrases in the intestine mucosa stronger than in the whole-body. On the other hand, in piscivore-facultative benthivore perch, which have the least AA, the inhibiting effect of Cu and Zn ions is 1.5 to 2 times higher in the whole body than in the intestine. The study data suggest that Cu and Zn ions at concentrations found in organisms that serve as fish food may not only reduce the rate of initial stages of carbohydrates hydrolysis in the juvenile fish intestine, but also considerably decrease the potential contribution of the food objects to the digestion processes in typical and facultative piscivores.

Key words

fish digestion carbohydrases heavy metals copper zinc 


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© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  1. 1.Papanin Institute for the Biology of Inland WatersRussian Academy of SciencesBorok, Yaroslavskaya oblast, Nekouzskii raionRussia

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