In Korea, lots of Israel carps are culture by means of net cages in the dams and lakes, nevertheless the parasitic condition and life history of cestoda including its damage are not reported at all. This reason lead to us to study the parasitic state and life history(from egg to procercoid) of Bothriocephalus opsariichthydis parasitized on a Israel carp, Cyprinus carpio in order to take an effective precautionary count-measures against its damage. Israel carp samples were collected from two fish farms, Taecheon and Kyongcheon, in August, 1984. After dissected the samples, we got out the cestoda, and examined the parasitic number and rate. Taking the eggs from the adult worms, we observed the development processes of eggs. And the coracidia were exposed to the four kinds of crustacea in order to investigate the infection state and development of larva. The parasitic rate of cestoda is 55.5% in carps from Taecheon, 64.7% in ones from Kyongcheon and 14.9% in gold carps from Kunsan. The eggs taken from the adult worm were hatched to coracidia within 48 hours under 26 to 28°C in the room. Thermocyclops hyalinus and Paracyclops fimbriatus show the affinity by the infection rate 93.5% and 75.5%, respectively. At 14 days after infected on Thermocyclops hyalinus and Paracyclops fimbriatus, the larvae of cestoda grow into a fully developed procercoids; 207 to 226(214)×90 to 102(94) ㎛in size.
INTRODUCTION MATERIALS AND METHODS RESULTS AND DISCUSSION CONCLUSIONS ACKNOWLEDGEMENTS REFERENCES