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THE EFFECTS OF LEAD NITRATE SUBLETHAL
CONCENTRATIONS ON THE DIGESTIVE ACTIVITY OF ONEYEAR
CARPS
Y. Zabytivskiy
Ivan Franko National University of L’viv,
Drahomanova st. 17a, L’viv 79005, Ukraine,
e-mail: ndl41@franko.lviv.ua
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The effects of lead nitrate sublethal concentrations on the digestion of one-year
carps is expressed in activity distribution of carbohydrases, which have different origination
and take part in the processes of membrane and cavity hydrolyses. The concentration
of lead in the water up to 0.2 mg/l causes stress state in the fishes, which continuas
for three days, afterwards the state of adaptation comes. The lead in the concentration of
5 mg/l is a stressor for carbohydrases of membrane origination after first day of exposure,
deformation of microvilla is occuring after eighth day of the exposure, also hydrolytical
and transport processes are going worse but medial part remains resistant to the
intoxication. Cavity digestion is inhibited.
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Keywords: carp, lead, carbohydrases, digestion.
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