TY JOUR TI EFFECTS OF LEAD IONS ON THE ACTIVITY OF GLYCOSIDASE IN THE INTESTINE OF FISH BENTHOPHAGE FROM THE RYBINSK RESERVOIR AREAS WITH DIFFERENT ANTHROPOGENIC LOAD KW fish KW bream KW roach KW digestive glycosidase KW amylolytic activity KW maltase KW heavy metals KW lead JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Urvantseva, G.. AU Golovanova, I.. PY 2013 IS 2013 PB Astrakhan State Technical University