A Comprehensive Analysis of Feeding Indices in Schizothorax richardsonii, a Himalayan endangered Species

Abstract

Feeding indices in fish are tools used by researchers to know feeding behavior, habits, and diet. This study is about various feeding indices of the endangered fish Schizothorax richardsoni of Uttarakhand. The main objective of the study was to study the fish's feeding behavior. A total of 74 fish samples were collected monthly over 12 months. Sample collection and calculation of all indices were done according to the standard method. Seasonal variations in feeding were noticed in all samples. In April, the mean value of GaSI reached its peak at 20.38, indicating active feeding during this period; conversely, it was lowest in January. The RLG values ranged from 2.53 to 5.54, suggesting that fish is primarily herbivorous. Feeding intensity was increasing from November to January and May to June, indicating increased feeding activity during these periods, while it was decreasing in July to September and March to April. Fish weight-gut weight and fish length-gut length show strong positive correlations. With a comprehensive understanding of the fish's feeding behavior, researchers can gain valuable insights into the fish's ecological role and the health of the river ecosystem. Therefore, acquiring detailed knowledge is essential for achieving positive outcomes in its culture and conservation.