Artificial spawning of carp, Cyprinus
carpio (L.)
E. Brzuska, H. Białowąs-2002
Aquaculture
Research, 33(10):
753-766
Abstract:
The effect of reproduction was investigated on females of Hungarian
strain W, French strain F, and their cross-breed 1X whose ovulation was
stimulated with carp pituitary (0.3 mg kg-1and, after 12 h, 2.7
mg kg-1) or Ovopel (one-fifth of a pellet per kg and, after 12 h,
one pellet per kg). It was found that in the case of Ovopel treatment, the
percentage of spawning females of strain F and the cross-breed 1X was
higher than in the hypophysed fish compared. The applied ovulation
stimulators did not significantly affect the weight of obtained eggs,
whereas the significant (P </= 0.01) effect was recorded with
respect to the quality of eggs after 12-, 24-, 36- and 48-h of incubation.
After Ovopel stimulation, the quality of eggs was better. The origin of the
females had no statistically significant effect on the weight of eggs
although the yield of eggs from fish of strain W was much smaller than
that from females of strain F and the 1X cross-breed. The interaction
between the ovulation stimulator and the provenance of the females was
significant (P </= 0.05) for the percentage of live embryos after
48-h of incubation of eggs. Eggs of the best quality (and highest weight)
were obtained from fish of strain F and cross-breed 1X treated with
Ovopel. In females of strain F that spawned within 6 and 10 h after the
second Ovopel injection, the effect of the ovulation time on the weight of
eggs was non-significant. It was significant with respect to the percentage
of egg fertilization and of live embryos after 36-h of incubation (P
</= 0.01 and P </= 0.05 respectively). The better quality of
eggs (and their higher weight) was recorded when this time was shorter.
(Polish Academy of Sciences, Institute of Ichthyobiology and
Aquaculture, Gołysz, 43-520 Chybie, Poland. E-mail:
zigr@bb.onet.pl)