FISH DIVERSITY OF TULSIHAWA LAKE, RUPANDEHI, NEPAL
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Amrit Campus
Abstract
The study on the fish diversity of Tulsihawa Lake, Rupendehi, Nepal was carried out
four different seasons from October 2021 to July 2022. The cast net was used to
collect fish samples hiring local fishermen. Physico-chemical parameters were also
analyzed. A total species richness of 19 species was collected from Tulsihawa Lake,
out of which 2 species were nonnative. Order Cypriniformes and family Cyprinidae
were dominant both in species composition and individual capture. Amblyphryngodon
microlepis was dominant species accounting 50.53% followed by Puntius sophore
(14.99%) and Chanda nama (8.21%). The water quality parameters were found within
suitable range that supports fish diversity. Fish diversity was positively correlated
with temperature, transparency, dissolved oxygen, and alkalinity whereas turbidity,
pH, and total hardness negatively correlated. The Shannon - Weiner diversity index,
Margalef's richness and evenness index indicated a strong relationship with overall
species richness. So, it is concluded that Tulsihawa Lake harbors suitable habitat for
variety of fish species and aquatic inhabitants.