PRELIMINARY STUDY ON THE EFFICIENCY OF SEVERAL OVULATION INDUCING HORMONES ON PIKEPERCH (SANDER LUCIOPERCA)

Abstract

The development of European freshwater aquaculture needs diversification of its production with reliable culture methods of new fish species. From the last two decades, more research efforts were done in order to develop culture of pikeperch (Sander lucioperca L.). Most market size pikeperch come from open waters and relatively few are produced under intensive and/or indoor conditions. The aim of this study was to test the efficiency of different hormones on pikeperch ovulation in order to reproduce the species under controlled environmental conditions. Eight clinically healthy adult pikeperch females (3-4 years old) were used in our experiments. They were injected with human chorionic gonadotropine - hCG (Pregnyl) and carp pituitary extract (CPE), without photo-thermal stimulation. None of the females ovulated at 72 hours after the injection. When water temperature was increased to 17°C, females stimulated with hCG ovulated first, then one of the females stimulated with CPE. None of females from the control group ovulated.

Keywords

• pikeperch
• hormones
• ovulation