slides

Semiartificial propagation of Stizostedion lucioperca and rearing them to fingerling size

Abstract

A research experiment carried out to pike-perch culture for enhancement program in southwest Caspian Sea. Broodstock achieve spawning time during March-April when the ambient temperature in local climate ranges 12–14°C. Manmade nests prepared by wooden frames and which synthetic wool bunches are fastened and placed in pond water at intervals of 5 meters each. The spawners preferred the green texture nest material which were placed close to bottom. The eggs drop on the nest and average fertilization occurred 30-90%. The nests, eggs on them are kept in mist chamber and also collected fertilized eggs placed into 200 Lit zughar for development. The former method and technique produced better survival rate. Appearance of eye pigmentation on the eggs observed during the 3th or 4th day of incubation process. Yolk-sac absorption lasted 9-13 days. The water temperature recorded 12-16°C during the culture. The numbers of 1 g dry eggs computed 1900-2050 and swelled eggs 1120-1170. Average size of one-day old larvae were 2.8-3.5 mm and the size of first exogenous feeding fries measured 4-6 mm

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