Gastro-Somatic Index Variation in Cirrhinus mrigala Under Changing Body Weights

The purpose of the study was to examine the fish Cirrhinus mrigala's gastrosomatic index (GSI), which is a measurement of the fish's stomach weight in relation to its overall body weight. As GSI acts as aimportant indicator of the fish's overall health, nutritional state, and feeding patterns. The aim of the research is to understand the variations in GSI. among different fish species of different weights, and ecological circumstances. the connection between weight and height, in addition to condition metric, comparative intestinal length, and gastro-somatic ratio One hundred Cirrhinus mrigala specimens were examined for the relationship between weight condition factor, relative gut weight, and gastro-somatic index (Ga.SI). The value, ranging from 3.007 to 000 for 100 species were inversely proportional to body weight, indicates that the fish exhibit isometric growth under the current conditions. The smallest fish having weight 133gram showed (Ga.SI).value 3.007 while fish having weight 975gm showed (Ga.SI value 0.615 suggesting that the fish weight is inverse to (Ga.SI). Regression equations were used to establish the relationship between total weight and gut weight. The Relative length with weight of gut values provided insights into the feeding habits of the species, with Cirrhinus mrigala being oligophagous a fish That feeds in the lowest layer of water feeding on the bottom on decayed vegetation, although it can also switch to a filter feeding mode g on the bottom on decayed vegetation, although it can also switch to a filter feeding mode. The thin terminal lips are adapted for picking up food material from the substratum (Jhingran and Khan, 1979). The Ga.SI value was employed to assess feeding intensity and was found to be lowest among large fishes.