Longitudinal Patterns of Population Structure for Fishes Inhabiting River Tawi in Jammu region (J&K)

摘要

The present study, was carried out to investigate the diversity and assemblage structure of ichthyofauna of both upstream and downstream section of river Tawi from four different sections i.e. Station I (Chenani), Station II (Jhajjar kotli), Station III (Nagrota), and St^ion IV (Gujjar Nagar). The sampling was done from January 2016 to December 2016. The results of present investigation revealed the occurrence of twenty one fish species in all the study stations belonging to five orders viz. Cypriniformes, Mastacembeliformes, Synbranchiformes, Perciformes & Siluriformes and 6 families i.e. Cyprinidae, Nemachilidae, Mastacembelidae, Chinnidae, Sisuridae and Bagaridae. In all the study stations Cyprinidae was found to be dominant (62%) followed by family Nemacheilidae, (9%) Mastacembelidae, (9%) Channidae, (10%) Sisuridae and Bagaridae showed least contribution of 5% each. The fish diversity indices i.e. Shannon weiner (H) and Evenness (e) at all the stations were 1.286 & 0.7234，1.662 & 0.753, 1.959 & 0.5454 and 1.978 & 0.4252 at station I，II，III and IV respectively.