Survey on parasite infectation of two years old carp bream ,Abramis brama, to Ligula intestinalis in Alagol Lake and Gorganroud, Golestan province

To evaluate the infection of carp bream ,Abramis brama, with ligula intestinalis in Golestan province, 92 fish samples from two regions: Gorganroud (61 samples) and Alagol lake (31 samples) were investigated. According to the result in the present study, the prevalence of ligula intestinalis plerocercoid infestation in carp bream from Alagol Lake for male, female and overall (male and female) were 5.88%, 7.14% and 6.45%, respectively, also in the Gorganroud river for male, female and overall (male and female) were recorded as 22.22%, 26.47% and 24.59%, respectively. Based on the statistical analysis, the prevalence of this parasite in fish specimens from the Gorganroud was recorded significantly higher than Alagol lake`s specimens. In this study the mean intensity ± SD of parasite infestation for carp beam in Alagol Lakes and Gorganroud were recorded as 2.5 ± 2.1 and 2.00 ± 1.25, respectively. There was no significant difference in mean intensity of ligula intestinalis infectation between two mentioned regions (P