期刊名称：International Research Journal of Environmental Sciences
电子版ISSN：2319-1414
出版年度：2013
卷号：2
期号：2
页码：38-43
语种：English
出版社：International Science Community Association
摘要：The present work is an attempt to assess the biodiversity of fish fauna in Karanja Reservoir located in the northern part of Karnataka between 17°2230 N latitude and 76°59 E longitude. During the study period, it was observed that the 64 species of finfishes belonging to 37 genera, 16 families and 5 orders were recorded. Among them order Cypriniformes represented 31 fish species followed by Siluriformes 20, Perciformes 10, Osteoglossiformes 2 and order Synbranchiformes 1 fish species. The Simpsons index of diversity (1- Lambda') was highest in Athiwala (B) (0.9235) followed by Byalahalli (A) (0.8970) and Kheni Ranjola (C) (0.8842). This indicated that the greater fish biodiversity in Athiwala fish landing centre when compared to other two centres. Overall the number of fish landings was more in A (S= 60, N= 7342) followed by B (S= 59, N= 5507), A (S= 59, N= 3487) and the species richness (d) was more in B (7.1106). However, Margalefs species richness (d) showed clear differences between the centres. Further the number of dominant species (N) was more in B. The similarity in species composition and abundance among centres was in the range of 76.21-83.46. In this study an attempt has been made to evaluate the ichthyofaunal diversity in the region and suggests mitigating measures.
