INDUCED SPAWNING OF KOI CARP

Artificial spawning is the most effective and the most reliable method of eggs and fingerlings production, and control of infectious and parasitic diseases. The aim of this study was to investigate the possibility and efficiency of out-of-season induced spawning of KOI carp, the impact of body mass of females on the number of eggs, as well as the correlation between the percentage of migrated oocysts and spawning success. To induce and synchronize ovulation and spermiation by hormonal stimulants, fish receive injection of pituitary gland, calibrated pituitary extract or a synthetic GnRH. In our trial of induced spawning of carp, we used cCPE because of winter time and out-of-season spawning. There was significant correlation (F=0.709) between the body weight of the female to the weight of eggs and a significant correlation (F=0.642) between the body weight of the female and the number of the eggs. We found negative correlation (F = -0.530) between the percentage of migrating oocytes to spawning success. We assume that the reason can be related due to environmental circumstances, as well as the quality of spawners. Even though the percentage of spawning was lower than normal percentage of spawning for carps we had satisfactory success because it was done out of season.