Inovativni metody v chovu a reprodukci candata obecneho (Sander lucioperca)
The whole Ph.D. thesis includes in total 10 chapters on 146 pages. Chapter 2 9 are specific parts of thesis where following scientific and practical aspects of pikeperch reproduction biology and aquaculture are described. Quality and quantity of pikeperch spermatozoa after varying cold water treatments are presented in the chapter 2 and can help to optimize broodstock management of males with the aim to obtain high quality spermatozoa during a seasonal and an out of season spawning as well. Benefits of hormone treatment of both sexes in semi artificial reproduction in pikeperch are described in the chapter 3 where the importance of hormonal treatment of both sexes in tank spawning is evaluated for effective production pikeperch larvae. The use of an alcalase treatment for the elimination of pikeperch egg stickiness is being shown in the chapter 4 of this thesis. Post ovulatory oocyte ageing and its effect on eggs viability rates and occurrence of larval malformations and ploidy anomalies are listed in chapter 5. These results describe the effects of the egg over ripening fertilization process in pikeperch. The first report of heat shock triploidisation in pikeperch is described in chapter 6 with production of 100% pikeperch triploid population. The effect of water surface treatment on survival, swim bladder inflation and growth of larvae is given in the chapter 7 with the aim to optimize the intensive culture of pikeperch larvae. Last two chapters (8 and 9) are describing the adaptation of intensively cultured juveniles to pond culture and the adaptation of pond cultured juveniles to RAS as a new and effective methods for ongrowing production of pikeperch. In total, four published scientific papers, one handbook, one accepted scientific paper for publication, and two prepared scientific manuscripts are included and discussed in this Ph.D. thesis.