The present study of fish diversity in the Linganamakki reservoir recorded 51 species from 32 genera and 16 families. The departmental ducuments have recorded 22 commercial fish spe­cies in the Linganamakki reservoir. Besides, sampling limitations, the present study could not record six species namely Hypophthalmichthys molitrix, Mystus seenghala, Labeo calbasu, Channa punctatus,Cchanna striatus and Tor tor. The local fishermen identified

only Hypophthalmichthys miolitrix, which was once found in the reservoir and is presently not found. Whereas, they could not recall the presence of the remaining five species in the past. It seems that these species were not found in the reservoir at least for the past 30 years or so. Still, it may need further clarifications to comment on the same.

Among the introduced species only Cyprinus carpio is abundantly found and to certain extent the Labeo rohita. But the catch of Cirhina mrigala and Catla catIa has reduced in the last two to three years. Even a majority of cyprinus carpio and lebeo rohita indviduals are very large indicating the presence of only the seeds introduced several years back.

The native fishermen opined that the native carnivorous fishes like Wallago attu, Channa marulius, Heteropneustes fossilis, and more importantly Ompok bimaculatus are becoming rare.

Figures 1 and 2 clarify the clear dominance of the species belonging to the family cyprinidae. Generically Puntius dominates. Basically, the order Cyprinidae is one of the largest orders in ichthyology. Im­portantly the Labea genus with relatively high com­mercial value has recorded five species, without a record of Labea calbasu. There was a single species of the huge genus Nemacheilus. The species distribution of this species was limited to some of the western hill streams like Nagodi, Kouthi, Birer and Yenne Hole'. Lepidacephalus termalis was obtained only in a hill stream near Biligaaru. Species belonging to the family Ambassidae (Glass Fishes) are more or less equally distributed in the reservoir and was sparse in streams. In general, the wide habitat spectrum generically the Puntius and at family level the Cyprinidae has resulted in their richness in the study area. Among the hill stream fishes, Rasbara danicanius and Danio aequipinnatus are common and found in almost all the sampled localities.