Further studies on some problems facing rearing of ornamental fishes

In this study a total number of 1410• ornamental fish werecollected from different localities. from which 360 ornamental fish (270egg layers and 90 livebearer fish) were examined to study the mainparasitic, mycotic and bacterial diseases affecting ornamental fish. Theprevalence, clinical signs, postmortem lesions and histopathologicalfindings were recorded. Also 380 fish were used for pathogencity testand treatment trials of some diseases. Another 670 ornamental fish wereused to determine the effect of different types of food, copper sulfatesod. thiosulfate on the ornamental fishes health and growth.The results of this investigation revealed that:1- out of 360 examined ornamental fish only 174 were clinically infectedby rate of 48.3%. The live bearer possessed .the highest percentage(52.2%) of infection than egg layer (47.03%).2- Ichthophthariasis as single infection possessed the highest percentageof infested cases constituting 15.1 %. The incidence of single infestationwith other parasites, trichodinasis, monogeneasis, lernaeasis andargulosis were 4.5%,7.5%, 3.03% and 10.6% respectively. On the otherhand, the mixed infestation by argulosis and monogeneasis possessed the highest percentage constituting 19.7% than the incidence of other mixedinfestation with ichthophthariasis and trichodinasis, monogeneasis andtrichodinasis, lernaeasis and monogeneasis which were 12.1 %, 15.1 %and 12.1 % respectively. The infested fish showed excessive mucussecretion on gill, skin and fms and roughness. of scales. Presence ofwhite spots in case of ichthophthariasis. Fish infested by lernaea .