author(s)
Sengbira K Sangma, Pampa Bhattacharjee and Prasenjit Pal

abstract
Length-weight relationship, condition factor, relative gut length and gastro-somatic index (Ga.SI) were calculated for 122 specimens of Chanda nama and 70 specimens of Trichogaster lalius. The b value for both the species was 3.08 which indicate isometric growth of the fish in existing scenario. The value of condition factor was 0.93 for C. nama and 1.94 for T. lalius indicates good condition of the fish. The relationship between total length and gut length was drawn using regression equation. The Relative length of gut (RLG) values revealed the feeding habit of C. nama as carnivorous and in T. lalius the values revealed that the juvenile shows carni-omnivorous feeding habit whereas in adult it is herbi-omnivorous. The Ga.SI value was used to determine feeding intensity and was found to be lowest in the month of July for C. nama and June for T. lalius which may coincide with the breeding season of the fish.