The effects of age and weight of catched and cultivated broodstocks of wild Carp (Cyprinus carpio Linnaeus, 1758) on some reproductive characteristics

Document Type : Biology(Animal)

Authors

1 Department of Fisheries, Faculty of Animal Science and Fisheries, Sari University of Agricultural Sciences and Natural Resources

2 Agricultural Research and Development Research Institute, Fisheries Research Institute of Iran, Inland Waters Aquatic Stocks Research Center, Gorgan

Abstract

In this trial, it was studied some reproductive characteristics of wild Common Carp brood stocks caught from the sea and reared in ponds. The effects of age and weight were assessed on some reproductive characteristics such as percentage of fertilization, number of fertilized eggs, number of early hatched larvae, egg diameter and the number of eggs per gram produced by both groups. The results showed that weight and age of females had no significant effect on percentage of fertilization, the number of fertilized eggs, number of early hatched larvae, diameter and number of eggs per gram (P>0.05) but it had significant effect on the percentage of hatching, so that percentage of hatching was significantly higher in wild caught brood stocks (P<0.05). Also, type of brood (wild and cultivated) had no significant effect on percentage of fertilization, number of fertilized eggs, number of early hatched larvae, eggs diameter and the number of eggs per gram (P>0.05), but it had significant effect on  percentage of hatching (P<0.01) so that percentage of hatching was significantly higher in wild broods. In conclusion according to the results, it founded that age and weight of female broods in contrast to male broods, had significant effect on  percentage of hatching (P<0.05), and also type of broods had significant effect on this parameters. 

Keywords

References

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Journal of Animal Environment
Volume 10, Issue 2
July 2018
Pages 171-176

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