Doze and time-dependent lead influence on survival rate and condition of oxidizing and antioxidatic system of Russian sturgeon (Acipenser gueldenstaedti Brant) young fishes

It is studied the doze- and time-dependent lead influence survival rate, development and a condition of oxidizing and antioxidatic system of Russian sturgeon young fishes. On reaching the temporary threshold of saturation the fishes body by lead ions it was revealed morphogenetic changes, delay of growth rates, decrease in body weight, doze- and time-dependent lethality of fishes, neurotoxic manifestations. The oxidizing stress is characterized by phase changes of content of malonic dialdehyde, catalase activity and integral antioxidatic activity, testifying to activation the protective mechanisms during fixed periods of lead intoxication.