Artificial propagation of the carp (Cyprinus carpio): two-year reproduction results of females of Hungarian line W and Polish line 6 after ovulation stimulation with carp pituitary or mGnRH-a and dopaminergic inhibitor

摘要

Effects of propagation were investigated in females of Hungarian line W and Polish line 6 during two successive years. In females of these provenances ovulation was stimulated with carp pituitary (dose I of 0.3 mg/kg and after 12 h dose II of 2.7 mg/kg body weight) or with Ovopel - preparation containing mGnRH-a and metoclopramide (dose I of 1/5 pellet/kg and after 12 h dose 11 of 1 pellet/kg). Irrespective of the ovulation stimulator higher percentages of females both of Hungarian and Polish origin spawned in the first year of the investigation. In the two years of the investigation in the two fish provenances eggs were obtained from a higher percentage of females treated with Ovopel than after hypophysation. The effect of year on the weight of eggs was statistically significant both in grams and in percentage of female body weight (P less than or equal to 0.01 and P less than or equal to 5 0.05, respectively), being insignificant with respect to traits characterising the quality of eggs. The ovulation stimulator, provenance of females, and the interaction between the stimulator and provenance did not significantly affect the weight and quality of eggs. The interaction between the year and ovulation stimulator and between the year and provenance of females was statistically significant (P less than or equal to 0.01 and P less than or equal to 0.05, respectively) only with respect to traits characterising the weight of eggs.