PRELIMINARY STUDY ON THE EFFICIENCY OF SEVERAL OVULATION INDUCING HORMONES ON PIKEPERCH (SANDER LUCIOPERCA)
Keywords:
pikeperch, hormones, ovulationAbstract
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.
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