Food And Feeding Habits Of Schizothorox Richordsonii (Gray, 1832) Inhibiting Bhagirathi River, Tehri Garhwal, India

Research Article
Amit Kumar Sharma., Malik D.S And Himanshu Bargali
Schizothorax richardsonii, Bhagirathi river, food and feeding, Garhwal.

Scientific knowledge about food and feeding habits of fish is considered as an important condition factor for increasing fish production. Food as well as feeding habits preferences of the fish species, varies with the time of day, with the season of the year, with the ecological condition and with the availability of food matter present in the water body. In the present study, an attempt has been made to investigate the food and feeding habits of the Schizothorox richordsonii inhibiting in Bhagirathi river at Tehri Garhwal. Based on the qualitative and quantitative analysis of gut contents, Schizothorox richordsonii has been categorized as herbivorous. Schizothorox richordsonii inhabiting Bhagirathi river (a cold water hillstream river) is a periphytonic feeder, feeding on Bacillariophyceae, Chlorophyceae, Cyanophyceae, detritus, and sand in very preferential order. Enterosomatic index (ESI) indicates low feeding during spawning (October-November and February-March), while during pre- and post-spawning periods feeding increases. The mean value of the Gastrosomatic index (GaSI) and active feeding were found to be maximum 4.03 in January 2017 and minimum 1.24 in November 2016 respectively. Active feeding occurred during JanuaryFebruary months and also shows highest Gastrosomatic index value in winter prior to the breeding season started as well as poorer active feeding, occurred during the breeding season with the lowest Gastrosomatic index value.