Effect of Parental Origin on Dry Feed Habituation and Intensive onGrowing Results in Pikeperch (Sander lucioperca) Offspring

Özet

In pikeperch culture, breeders are often sourced from natural stocks and possible benefits of using intensively culturedbreeders to produce stocking material for intensive rearing purposes remain unknown. Therefore, the effect of parental originon the success of pikeperch juvenile culture was investigated in present study. Two phases were investigated, weaning ofpond-reared fry and initial on-grow of weaned juveniles, i.e. fingerling rearing phase. Two batches of 5-day-old larvaeoriginating from intensively reared (CULTURE) and wild breeders (WILD) were stocked in two ponds for larval nursing. Onemonth later, juveniles were harvested and stocked in five tanks per group for the evaluation of the success of habituation tointensive rearing conditions. At the age of 3 months, the 6-week trial on intensive on-grow performance was established.WILD fish exhibited a higher habituation success and survival during the period of habituation to the formulated diets thanCULTURE fish. After 6 weeks of intensive on-grow, CULTURE juveniles exhibited a significantly higher specific growthrate. It seems that early domestication does not have positive effect on the weaning of pond-nursed juveniles. However,juveniles originating from cultured broodstock appear to be more appropriate stocking material for intensive on-grow.