Abstract

• Diversity of fish fauna in Myit Daunt Gwae In (Lake) was studied from September 2017 to August 2018 in two sampling sites (western part of the In Site I and eastern part of the In Site II). In the present study, a total of 42 species confined to 29 genera, 17 families and eight orders were recorded. In Site I total number of 189254 individuals with 42 species and in Site II 149786 individuals with 42 species were recorded. Diversity of fish species was assessed by calculating the various diversity indices such as Shannon-Wiener’s index (H'), Simpson’s index (D), Margalef’s index of species richness and Hill’s diversity number (N1), (N2) and (E). Diversity indices varied among the two sampling sites according to the catch in terms of both the number of species and the number of individuals. The values of species richness and diversity indices were found to be higher in Site I than in Site II. On the seasonal basis, the highest value of diversity indices was observed in cold season at Site I and in rainy season at Site II. According to the number of fish species, individuals and diversity indices, the study area Myint Daunt Gwae In may be related to the suitable ecology of water body. So there is a need to continuous maintain the In (Lake) in order to protect and conserve the fish fauna to thrive in the In (Lake).