[Study of gregarine infection in Kiddi shrimp Parapenaeopsis stylifera] and pacific white shrimp [Litopenaeus vannamei] in Khouzestan province]

One of the most important causes of shrimp diseases in wild environment and Farms are Parasitic disease and Gregarines are the reutine parasites in shrimp. This study was conducted in Khouzestan Province, to determine the prevalence and intensity of Gregarine parasites in Kiddi shrimp [Prapenaeopsis stylifera], a natural species of Persian Gulf, and Pacific white shrimp [Litopenaeus vannamei], currently the major cultured species in Iran. Shrimps were randomly collected from Persian Gulf and Choebde shrimp farms in Abadan, Digestive tracts of the shrimps were studied using wet-mount diagnostic procedure. In this study no Gregarine parasites were observed in Pacific white shrimp whereas infection rate among Kiddi shrimp was 32.5% including Genera: Nematopsis, Rotundula, Heliospora and other unknown Gregarine parasites. The highest infection rate belonged to Genus Nematopsis[%9.55] According to the published materials available, this is the first report of Kiddi shrimp being' parasitized with [Gregarine parasites. Also the relationship between shrimp body length and the rate of infection was found to be positive. But there was no meaningful relationship between sex and the rate of infection

[Evaluation of geranium herbarum escence application in control of fungal contamination in rainbow trout eggs]

Assessment of the capability of Geranium herbarum escence in control of fungal contamination rainbow trout eggs. Experimental study. About 16 kg eggs of 3-4 years old Oncorhynchus mykiss brooders [232464 eggs]. The effects of this escence [1,5,10,25,50 and 100ppm] was daily evaluated until the eyed egg stage [about 18-20 days]. The positive control was treated with 1 ppm malachite green and the negative one assessed without any drugs. Analysis of Variance and t-student by SPSS. Culturing of affected eggs showed a contamination of Saprolegnia parasitica and Fusarium solani was obsereved. MIC valuse of Geranium escence against Saprolegnia and Fusarium were 4.8 and 18.2 ppm respectively. The geranium escence specially at 25, 50 and 100 ppm had significant difference compare to negative control [p<0.05]