About the reasons of stocking material's losses of common carp in Estonia
1995
Kasesalu, J. | Laius, A. (Estonian Agricultural University, Tartu (Estonia). Faculty of Veterinary Science)
The losses of stocking material of common carp grown in ponds are caused by the parasites Ichthyophthirius multifiliis and Dactylogyrus extensus and in wintering ponds by the parasites that belong to the families Chilodonella and Dermocystidium. The swim bladder inflammation causes the death of common carp especially in cool summers and cold winters. About one third of two summer old carps dies during the first month after stocking them into the pond in spring because of their bad physiological condition after winter starving, the influence of swim bladder inflammation growing more acute in spring, the attacks of fish-eating birds and various injuries. In the second half of summer the two summer old carps die from damage of gills and chronic toxication of NH3
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