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Abstract:Freshwater fish fauna of the Krishna River at Wai, and the Dhom reservoir upstream of Wai, was studied. Fifty one species belonging to 14 families and 33 genera were recorded; 13 endemic to the Western Ghats and two to the Krishna River system. Moderate to rare populations were found for six globally threatened species: Gonoproktopterus curmuca, Labeo potail, Schismatorhynchos nukta, Tor khudree, T. mussullah and Parapsilorhynchus discophorus. Fish in this area are under threat due to two introduced species and five transplanted species, and due to other anthropogenic activities such as overfishing and organic and inorganic pollution of the river. Site based conservation action plans are needed for conservation of rare and threatened fish in this area.

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Length-weight relationships (LWRs) are reported for four freshwater fishes from the Koyna and Nira Rivers of northern Western Ghats of India. Specimens were collected using the cast and gill net (3.5-7.5 cm mesh size) during June 2017 to July 2018. The b values for LWRs varied from 2.941 to 3.336 (r 2 >0.96 and p < 0.0001 for all species).New maximum total length was recorded for Hypselobarbus kolus, which is presently categorized as vulnerable. The results provide baseline information for the sustainable management and conservation of the studied species.

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