Abstract
On examining 144 specimens of Labeo rohita (Ham.) for parasites occurrence; as many as 34 fish were found positive to harbour ciliophorans (Trichodina sp. and Ichthyophthirius multifilis Fouquet, 1876), monogeneans (Haplocleidus vachi Tripathi, 1959 and Dactylogyrus glossogobii Jain, 1960), trematode (Allocreadium mahaseri Pandey, 1939), nematode (Camallanus (Zeylanema) anabantis Pearse, 1933) and acanthocephalan (Sachalinorhynchus sp). Highest prevalence was shown by platyhelminthes (18.75%) followed by ciliophorans (10.41%), nematode (4.16%) and acanthocephalan (2.77%) in succession. Maximum mean intensity and abundance has been shown by C. (Zeylanema) anabantis Pearse, 1933 while the monogenean H. vachi was on the 2nd rank. On the other hand, the least intensity and abundance was shown by Ichthyophthirius multifilis. The prevalence was recorded more in monsoon (52.77%) followed by post-monsoon (22.22%), summer (19.44%) and winter (8.33%) in succession. Further, the unit-wise intensity of parasites was recorded more in males than the females.
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