ABUNDANCE OF TWO GILL PARASITES (MONOGENEAN) IN A SINGLE HOST, LABEO ROHITA (HAM.) OF DIFFERENT LENGTH GROUPS INDOON VALLEY

摘要

On examining 561 specimens of Labeo rohita (Ham.), two monogenean parasites viz., Biftircohaptor gorakhnathai (Kumar and Agarwal, 1982) and Haplocleidus vachi (Tripathi, 1959) were recovered from the gills of thefish collected from river Song and Asan, respectively. Both the parasites could not be obtained in the fishes under the length group of 10-12 and 12-14 cm. However, Biftircohaptor gorakhnathai could be recovered in the fishes between 14 cm to 30 cm in length. On the other hand, Haplocleidus vachi was recovered 18 cm. onwards and up to 34 cm. More infection ofBiftircohaptor gorakhnathaiwas recorded in 22-24 cm. length group followed by 24-26 cm.